Chilton. — On the Isopodan Fauna of New Zealand. 145 



obliquely across the body, its retractor muscle is attached to its posterior 

 end and arises from the left posterior portion of the foot. The ovotestis 

 and spermatheca were not seen, but the peduncle of the latter is long and 

 opens into the vagina at some distance from the reproductive orifice. The 

 vas deferens leaves the oviduct about half way down, passes forward almost 

 as far as the reproductive orifice and then bends sharply backward opening 

 into the posterior end of the penis. 



Hab. Dunedin and Shag Point, on rocks and on the roots of D' Urvillaa 

 utilis. 



EXPLANATION OF PLATE XVII. 



A. Siphonaria obliquata. Alimentary system. 



B. „ „ Reproductive system. 



C. ,, „ Jaw x 6. 



D. „ „ Teeth x 190. 



E. Siphonaria australis. Jaw x 13. 



F. „ „ Portion of radula x 11. 



G. „ „ Teeth x 315. 



H. Siphonaria zealandica. Alimentary system. 



I. „ ,, Reproductive system. 



K. „ ,, Jaw x 22 (small specimen). 



L. „ ,, Radula x 11. 



M. „ ,, Teeth x 315. 



N. Siplwnaria redimiculiim. Alimentary system. 



0. ,, ,, Reproductive system. 



P. „ ,, Nervous system. 



Q. ,, ,, Jaw x 8. 



R. „ „ Teeth x 315. 



S. Gadinia nivea. Alimentary system. 



T. „ ,, Reproductive system (portion only). 



U. „ „ Radula x 10. 



V. „ „ Teeth x 315. 



Reference to Letters on Reproductive Systems. 



a, Penis. — b, accessory gland. — c, vas deferens. — d, retractor of penis. — e, ovotestis. 

 — ■/, oviduct. — g, spermatheca. The numbers under the teeth signify the number of the 

 tooth from the central one, which is marked c. 



Art. X. — Additions to the Isopodan Fauna of New Zealand. 



By Charles Chilton. 



[Read before the Philosophical Institute of Canterbunj, 6th April, 1S82.J 



Plate XVIII. 



While staying for a few days at Timaru during the last Christmas holidays 



I contrived to collect a few small Crustacea from amongst the seaweed that 



is exposed at low tide, just at the north side of the breakwater. 



10 



