. The Cambridge natural history. Zoology. !28 ORTHOPTERA on account of the capacious crop, and the small gut-like, chylific ventricle; eight elongate pouches are situate on this latter part at its junction with the gizzard. The Malpighian tubules are very numerous and delicate ; there are extensive salivary glands and reservoirs; and on the anterior part of the true stomach there are eight caecal diverticula. The great chain of the nervous system con- sists in all of eleven gangliaâtwo cephalic, three thoracic, and six abdominal. The ovaries in Stilojyyga orient- alis consist each of eight egg
. The Cambridge natural history. Zoology. !28 ORTHOPTERA on account of the capacious crop, and the small gut-like, chylific ventricle; eight elongate pouches are situate on this latter part at its junction with the gizzard. The Malpighian tubules are very numerous and delicate ; there are extensive salivary glands and reservoirs; and on the anterior part of the true stomach there are eight caecal diverticula. The great chain of the nervous system con- sists in all of eleven gangliaâtwo cephalic, three thoracic, and six abdominal. The ovaries in Stilojyyga orient- alis consist each of eight egg-tubes, placed at the periphery of a common receptacle or oviduct, the pair of receptacles themselves opening into a common chamber-;âthe uterusâ which is surrounded by a much branching serific or coUeterial gland. In this chamber the effp--case is formed from the secretion of the gland just mentioned. According Fig. 125.âAlimentary canal of Siiio- to Miall and Dennv,^ there is a pygaorientalis. (After Dufour.) c, i ⢠i Head ; I, salivary glands ; c, sallv- Spemiatheca wllich openS not into. ary reservoir ; d^ crop ; e, diver- ticnla placed below proventriculus ; /, stomacli ; g^ small intestine ; /;, rectum ; i, Malpigliian tutes; k, extremity of liind body. the uterus but into the cloacal chamber behind it. Lowne doubts this diverticulum being a true sperniatheca. The manner in which the eggs are fertilised and their capsule modelled is uncertain.^ The internal reproductive organs of the male are very com- plex in Stilopyga orientalis; each testis consists of a number (30 to 40) of vesicles placed on a tube which is prolonged to form the vas deferens. There is a very peculiar large complex gland consisting of longer and shorter utricles, opening into the vesiculae seminales, and forming a " mushroom-shaped ; * â ^ The Cockroach, p. 170. " Cf. Duchamp, liev. Sci. Nat. Monfjie/lier, vii. [?1879], p. 423. ' Huxley, Manual Anat. Invert. Animals, 1877,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
