. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). lil V. 474 INVEBTEBRA TE MORPHOLOO 7. various ommatidia. CO pg' Rh Pg*" T Fig. 217. — Ommatidium OF Eve of Munca (after HiCKBUN). c = crystiiUiue coue. CO = c'onieii. Pff = piijint'iit cells. r = retiimlii-ceUs. Bh = rlmlHloia. T = tiacheii. tv = tmchctil dllutatioD. Other sense-organs occur in the various groups, but may more satisfactorily be considered in the special descriptions of these groups. True nephridia similar to those of the Annelids occur in Peripatus
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). lil V. 474 INVEBTEBRA TE MORPHOLOO 7. various ommatidia. CO pg' Rh Pg*" T Fig. 217. — Ommatidium OF Eve of Munca (after HiCKBUN). c = crystiiUiue coue. CO = c'onieii. Pff = piijint'iit cells. r = retiimlii-ceUs. Bh = rlmlHloia. T = tiacheii. tv = tmchctil dllutatioD. Other sense-organs occur in the various groups, but may more satisfactorily be considered in the special descriptions of these groups. True nephridia similar to those of the Annelids occur in Peripatus, but iu the Myriapods and Insects they are en- tirely wanting, their place as excretory organs being taken by the Malpighiau tubules. The Tracheata are bisexual, the reproductive organs being typically paired and opjning to the exterior by ducts, which may unite before reachiiij^ the genital orifice. Accessory struc- tures, such as a bursa copulatrix for the reception of the penis and a recep- taculum seminis occur iu the female, ami vesiculiB semiuales and accessory glands in the male. The region of the body- wall in the viciuit}' of the reproductive orifice is in the Insects frequently iu- vagiuated, adding a still greater com- plication, and furthermore the terniiual portion of the duct in the male is frequently capable of being evaginated and thus serving as a penis, while integumentary elevations or processes of the last abdominal segment iovm ovipositors in the females. I. Clash Protraeheata. This interesting group contains but a single genus, Pcripntm, which has, lii>u- ever, a wide distribution, species Ixiiij,' found in tne West Indies and South Anu'rica, at the Capt' of Good Hope and in New Zealand, thus indicating an origimd wide distribution of the genus which has become extinct except iu these few widely separated regions. Feripiitm is an elongated cylindrical form, measuring iu. Please note that these images are extracted from scanned page images that may
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
