 | Thomas Henry Huxley - Anatomy, Comparative - 1864 - 360 pages
...deferens ; A, amis. Of these five certainly, and six probably, constitute the head, which possesses a pair of antennae, a pair of mandibles, and two pairs...hinder pair of which are coalescent, and form the organ called the " labimn." Three, or perhaps, jn some cases, more, somites unite and become specially... | |
 | Henry Alleyne Nicholson - Zoology - 1871 - 704 pages
...exceeds twenty. " Of these, five certainly, and six probably, constitute the head, which possesses a pair of antennae, a pair of mandibles, and two pairs of maxillas, the hinder pair of which are coalescent, and form the 'labium.' Three, or perhaps, in some... | |
 | Joseph John Murphy - Biology - 1879 - 650 pages
...January, 1872, p. 183. 3 Ibid. 7th December, 1871, p. 101. 3 These three pairs of modified limbs aro "a pair of mandibles and two pairs of maxillae, the...pair of which are coalescent, and form the labium." — Huxley. Zoeas, they have an abdomen \vithout appendages : as in all Zoeas, the mandibles are destitute... | |
 | Joseph John Murphy - 1879 - 636 pages
...January, 1872, p. 183. 2 Ibid, 7th December, 1871, p. 101. 3 These three pairs of modified limbs are "a pair of mandibles and two pairs of maxillae, the hinder pair of which are roalescent, and form the labium." — Huxley. Zoeas, they have an abdomen without appendages : as in... | |
 | Henry Alleyne Nicholson - Zoology - 1880 - 878 pages
...and six probably" (according to some authorities, four only), "constitute the head, which possesses a pair of antennae, a pair of mandibles, and two pairs...'labium.' Three, or perhaps, in some cases, more, somites Fig. 174.— Diagram of the external anatomy of an insect. ft Head carrying the eyes (o) and antenna... | |
 | Henry Alleyne Nicholson - Zoology - 1887 - 968 pages
...in reproduction ; j Femur ; only) " Constitute the t Tibia ; ta Tarsus. " '' head, which possesses a pair of antennae, a pair of mandibles, and two pairs...Insects, are attached. Two additional pairs of locomotive Fig. 225. — A, One of the Dragon-flies (sEskna grandis), slightly dissected : h Head, carrying the... | |
 | George Rolleston - Anatomy, Comparative - 1888 - 982 pages
...very great. The head appears to consist of five fused somites, denoted by the presence of two pairs of antennae, a pair of mandibles, and two pairs of maxillae. The number of somites in the thorax and abdomen of Entomostraca is extremely variable. In the Malacostraca... | |
 | Eugen Korschelt, Karl Heider - Embryology - 1899 - 464 pages
...be emphasised as an important Arachnidan character. The Insects, as is well known, carry on the head a pair of antennae, a pair of mandibles, and two pairs of maxillae, which, on account of their structure and ontogeny, are justly regarded as limbs ; further, there are... | |
 | Richard Hertwig - Zoology - 1902 - 730 pages
...appendages show no signs of a schizopodal condition. The head is always a distinct region, bearing a single pair of antennae, a pair of mandibles, and two pairs of maxillae, the posterior pair often being fused into a lower lip or labium. The respiratory organs are trachece (figs.... | |
 | Richard Hertwig - Zoology - 1905 - 730 pages
...the inflexibility of the anterior part of the body. The first five appendages are always two pairs of antennae, a pair of mandibles, and two pairs of maxillae. The remaining pairs vary greatly in character and from one to three may be modified into maxillipeds, while... | |
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ZOOLOGY. sesses a pair of antennae, a pair of mandibles, and two pairs of maxillae, the hinder pair of which are coalescent, and form the 
