. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE TliACUKATA. 485. Fig. 323.—Antkuiou Pou- TION OF A ClUliUl'OD. at = iiDtcnnoD. »«j' = uiuxilla. mx' = second mnxillu. mxp = maxilliped. cluwlike uud is perforated by the tluct of a poisfm-gland. Eacli trnuk-se({iueiit, of which tht'ie may be over a huudred, bears but a single pair of .\,pi)eiidu^es, there being uo conipouud se^iueuts as ill the Diplopoda. Each le^' is as a rule seven-joiuted, the coxal joiiits of those of the same segmeiit beiug widely separated, a
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE TliACUKATA. 485. Fig. 323.—Antkuiou Pou- TION OF A ClUliUl'OD. at = iiDtcnnoD. »«j' = uiuxilla. mx' = second mnxillu. mxp = maxilliped. cluwlike uud is perforated by the tluct of a poisfm-gland. Eacli trnuk-se({iueiit, of which tht'ie may be over a huudred, bears but a single pair of .\,pi)eiidu^es, there being uo conipouud se^iueuts as ill the Diplopoda. Each le^' is as a rule seven-joiuted, the coxal joiiits of those of the same segmeiit beiug widely separated, and there is uo mod'tica- tiou of the seventh pair to serve as copulatory or<5aus. though the pair of the penultimate segment are much reduced in size and lie at the sides of the reproductive orifice Stigmata are usually wanting in the first three trunk-segments, but occur in a certain number of the others, lying usually laterally between the segments except in Sciitigei^a, in which they have a dorsal position. They open into branched tracheal trunks which usually an- astomose with one another, though in Scutigent they open into sacs from which a large number of simple iiiibranched tracheal tubes arise arranged in a bunch as in the Diplopoda. Crural glands occur on the coxal joints of several of the posterior appendages. The nervous system is arranged as in other Myriapods, and simple eyes are usually present, in Scutigera only being closely aggregated together to form a faceted eye. This, however, is not a compound eye exactly similar to that of the Insects, but is to be regarded simply as a close aggregation of simple eyes. The reproductive organs are usually paired, and the sexes separate. The ducts unite before opening to the exterior, so that there is but a single opening situated on the antepenulti- mate segment of the trunk, the appendages of which are greatly reduced in size. The embryos of Scolopendra and GeopJdlus leave the egg with almost the same number of a
Size: 1551px × 1611px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1894
