170 Transactions. — Zoology. 



Central tooth rectangular, the length more than twice the breadth ; the 

 reflexed portion triangular, slightly sinuated on the sides, about half the 

 length of the base and with a moderate point. Inner laterals like the 

 central tooth, but more deeply sinuated on the inner side ; outer laterals 

 bicuspid, the inner cusp larger and with a long point, the outer cusp with a 

 small point. Inner marginals with a long acute point, and a small one 

 inside it ; outer marginals with the base as long as broad, and a single long 

 point. The cutting points increase in size as far as the middle of the 

 marginals and then decrease. 



Hab. Southland (G. M. Thomson). 



Helix kivi, Gray. PL ix., fig. a, and pi. xi., fig. i. 



Jaw composed of about 50 separate overlapping plates, the length of 

 which is four or five times the breadth, the inner edge of one plate 

 lying in front of the outer edge of the one next it ; all the plates transversely 

 striated. Central plate with a length of three times its breadth, the lower 

 margin emarginate. 



Dentition, 28-1-28. Laterals about 15. 



Central tooth rectangular, the length twice the breadth, the reflexed por- 

 tion not reaching half-way and slightly constricted at the sides, with a 

 broad cutting point. Laterals with the reflexed portion sinuated on the 

 inner margin, and an additional small point on the outer side. Inner mar- 

 ginals with a broad blunt double cutting point, with several small acute 

 ones outside it ; outer marginals with 3 or 4 acute points. 



Hab. Auckland (Cheeseman). 



Helk geanum, Pfeiffer. PI. ix., fig. l. 



Animal elongated, the foot narrow, projecting behind the shell ; mantle 

 subcentral, rather anterior, included ; eye-peduncles long, rather clavate ; 

 tentacles moderate. Colour white, finely speckled with dark grey above, in 

 front of the shell, and on the head, eye-peduncles, and tentacles ; edges and 

 sole of the foot often with white streaks. 



Jam like that of P. pilula. 



Dentition, 27-1-27. Laterals about 14. 



Central tooth wedge-shaped, broader behind ; the reflexed portion short 

 with a small cusp on each side. Laterals like the central tooth, but the 

 reflexed portion oblique, inclined inwards. Marginals with a broad base and 

 numerous points, of which one near the inner side is longer than the rest. 



Hab. Eyreton, N. Canterbury (C. Chilton). 



Paeyphanta phlogophoea, Pfeiffer. PI. ix., fig. z, and pi. xi., fig. p. 



Animal with the mantle subcentral, slightly reflected over the peristome 

 of the shell, the margin entire ; eye-peduncles moderate, thick, the tentacles 

 short; tail depressed, rounded, with a mucous gland. Colour slate grey, 

 the sole and sides of the foot orange. 



