164 Transactions.— Zoology. 
ParuLa Ina, Gray (ide). Pl. ix., fig. v. 
Animal with the body rather short and narrow; mantle sub-central, 
rather anterior, slightly reflected over the peristome of the shell; foot 
narrow, extending behind the shell, the tail truncated and furnished with a 
mucous gland: no locomotive disc. Eye-peduncles very long, cylindrical, 
approximated at their bases; tentacles long. Colour pale olive-brown 
spotted with dark brown; a longitudinal dark brown line runs round the 
side of the foot, below which it is edged with alternate, transverse, bars of 
brown and pale olive-brown. 
Jaw, with about 80 flat ribs, each transversely striated. 
Dentition, 22-1-22. Laterals about 8. 
Central tooth rectangular, longer than broad; the reflexed portion tri- 
cuspid, extending over a third of the base, the median cusp long and 
straight, but not reaching the posterior margin, the cutting point rather 
large, projecting beyond the margin; the side-cusps constricted on the 
outer side. Laterals like the central, but rather oblique, the outer side- 
cusps being larger than the inner. Inner marginals with a single bidentate 
cutting point; outer marginals broader than long, with several cutting points. 
Hab. Greymouth (R. Helms). 
PATULA CORNICULUM, Reeve (= eta, Pf.). Pl. ix., fig. r. 
Animal like coma, but the eye-peduncles smaller and not clavate. 
White, slightly speckled with grey above; peduncles purplish. 
Jaw finely striated. 
Dentition, 14-1-14.  Laterals 4 or 5. 
Central tooth rectangular, longer than broad; the reflexed portion about 
half the length of the base, tricuspid, the middle cusp long, extending to 
the posterior margin and armed with a small point. Laterals like the 
central tooth, but the middle cusp more clavate. Inner marginals with 
one, and outer with three acute points. . 
Hab. Eyreton, North Canterbury (C. Chilton). 
In the shell the interstices between the ribs are finely reticulated. 
ParuLa INFECTA, Reeve (= zeta, Pf.). Pl. ix., fig. n. 
Animal like coma. White, eye-peduncles and a stripe on each side of 
the head greyish. 
Jaw finely striated. 
Dentition, 15-1-15. Laterals 3. 
Central tooth rectangular, broader than long; the reflexed portion 
tricuspid ; the side-cusps constricted on the outer side; middle cusp reach- 
ing to the posterior margin and the cutting point projecting beyond. First 
lateral like the central ; the others smaller, bicuspid, the inner cusp small, 
the outer long, narrow, and with a small point. Marginals tridentate, the 
denticles nearly equal in size, 
