The Apodida: A Morphological Study |
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Page 13
... lateral edges of the shell fold . This ridge is of consider- able interest , as it appears in almost every Trilobite . We shall later find reason to believe that it was a ༣- FIG . 2. - Diagram of head and first trunk segment of Apus ...
... lateral edges of the shell fold . This ridge is of consider- able interest , as it appears in almost every Trilobite . We shall later find reason to believe that it was a ༣- FIG . 2. - Diagram of head and first trunk segment of Apus ...
Page 14
... lateral projections , the middle part of the fold being merely indicated by a low ridge , which is not sufficient to form a barrier across the ventral surface . These two projections have been handed on to the higher Crustacea as the ...
... lateral projections , the middle part of the fold being merely indicated by a low ridge , which is not sufficient to form a barrier across the ventral surface . These two projections have been handed on to the higher Crustacea as the ...
Page 15
... Laterally it covers and protects the limbs . Posteriorly , it is armed with thorns , and has a keel along the dorsal ... lateral edges of the shield are prolonged into the ridge which , run- 1 Cf. pp . 39 , 40 , and 194 , also Fig . 43 ...
... Laterally it covers and protects the limbs . Posteriorly , it is armed with thorns , and has a keel along the dorsal ... lateral edges of the shield are prolonged into the ridge which , run- 1 Cf. pp . 39 , 40 , and 194 , also Fig . 43 ...
Page 21
... lateral parts remained soft and flexible . We also find certain parts of the body thickened for protection against other parts . Thus the outer edges of the under lips are thickened for protection against the working of the powerful ...
... lateral parts remained soft and flexible . We also find certain parts of the body thickened for protection against other parts . Thus the outer edges of the under lips are thickened for protection against the working of the powerful ...
Page 53
... lateral edges of the dorsal fold , so the musculature can easily be traced back to that of a typical Annelid ... laterally , both dorsally and ventrally , into the parapodia . At the posterior end of the body where the parapodia are less ...
... lateral edges of the dorsal fold , so the musculature can easily be traced back to that of a typical Annelid ... laterally , both dorsally and ventrally , into the parapodia . At the posterior end of the body where the parapodia are less ...
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Common terms and phrases
2nd Edit 3rd Edit acicular glands animal Annelidan antennæ Apodidæ appendages Apus bending body brain canal carnivorous Annelid chitinous Cirripedia Cladocera cœlom Crustacea cuticle deduce developed diverticula dorsal parapodium dorsal shield eggs ENGLISH epithelium ESSAYS Eurypterus excretory exoskeleton eye of Apus fold function ganglia genital Globe 8vo gradually groups head-shield higher Crustacea HISTORY homology hypodermis Illustrated intestinal jaws labrum larva larvæ lateral limbs of Apus Limulus longitudinal Malacostraca mandibles masticatory ridges maxillæ membrane ment mid-gut modern Crustacea morphological mouth muscle bands musculature Nauplius nephridia nerves number of segments ocelli œsophageal commissures original Annelid Ostracoda pair of limbs paired eyes Phyllopodan POEMS position posterior primitive Crustacean probably Prof prostomium Pterygotus pygidium round rudimentary second antennæ sensory cirrus sensory organs SERMONS shell gland sinus specialised surface theory tion Tracheata Trilobites trunk limbs trunk segments tube unpaired eye ventral parapodia vols
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