52 SUTER : COMMUNICATIONS FROM NEW ZEALAND. 



and the laterals, normally also tricuspid, offer various distorted shapes, 

 but the transition teeth, 9 — 12, are nearer the normal form. 



The other case occurred in Charopa l>ianca, Hutt. (fig. 3), where 

 the laterals i — 4 have about the same shape as the transition tooth 5 

 in the normal radula. 



The same form of abnormal teeth is repeated through the whole 

 length of the radula. 



The normal radula of F. hypopolia is figured in '■'■ Trans. N. Zeal. 

 Inst.,^' xxiv, pi. XX, fig. 4, and '■'•Man. Conch." (2), ix, pi. ii, fig. i, and 

 that of CJi. hianca in '^Trans. JV. Zeal. Inst." xxiv, pi. xxi, fig. 21. 



3.— Endodonta (Charopa) egesta (Gray). 



(Plate iii, figs. 4—6.) 



The peculiar sculpture of this species, resembling slightly that of 

 E. ( Acanthoptyx) acanthinida, Crosse, from N. Caledonia, and also 

 Fla/nmulina ( Siiteria) ide. Gray, from New Zealand, made me some- 

 what suspicious whether this shell was really correctly classed, its 

 anatomy being hitherto unknown. When in Auckland I found a few 

 living specimens, and these I used for studying part of their anatomy. 



The jaw (fig. 4) is thin and transparent, yellowish, arcuate, tapering 

 at both ends, with a sharp concave cutting edge without median pro- 

 jection, vertically distantly and faintly striated. 



The radula (fig. 5) is tongue-shaped, with the formula 9 — 5 — i — 

 5 — 9. Marginals low and wide, with longer entocone and mesocone, 

 which are united at their base ; the ectocone appears first as a small 

 cusp, then multiplies to 2 and 3 cusps, which are reduced to a single 

 cusp again. The transitian teeth become more elevated, the long 

 mesocone separates from the equally long entocone, the ectocone still 

 remaining small. The laterals are tricuspid, the mesodont extends 

 beyond the posterior end of the base, and the endodont has a longer 

 and stouter cusp than the ectodont. The tricuspid central tooth 

 has a short mesodont, which does not extend to the posterior end 

 of the base, and minute side-cusps. 



Reproductive orga?is (fig. 6). The albumen gland is small, the free 

 oviduct slightly contracted behind its middle, and the receptaculum 

 seminis is inserted very little in front of the place where the vas 

 deferens diverges from the common ducts. The penis sac is stout 

 and rather short, the vas deferens enters in front of the posterior end, 

 where the retractor muscle is attached, and the penis sac is contracted. 



Foot without a caudal pore. 



There can be no doubt now that the species is in its right place. 



i 



