206 Transactions.—Zoology. 
P. ruLminata, Hutton (1882). 
Spire convex, finely striated; very narrowly umbilicated ; estrella 
sub-callous. Pale horny with reddish-brown undulating bands. Diameter 
:84 inch. Dentition, 88-1-88. 
Stewart Island (T. Kirk). 
Sec. ELASMOGNATHA. 
Jaw in a single piece, with a more or less quadrate projecting plate above. 
Fam. Janellida. 
Animal limaciform, without tentacles; mantle rudimentary or absent. 
Respiratory orifice near the median line on the back. 
Genus Janella, Gray. 
Mantle absent; shell rudimentary; a mucous pore in front of the 
respiratory opening. Back with a longitudinal groove giving off oblique 
ranches on each side. 
J. BITENTACULATA, Quoy and Gaimard (1832) ; Athoracophorus bitentacu- 
latus, Gould (1852); J. antipodarum, Gray (1853). 
Yellowish, marked with pale brown ; tail depressed, acute. Dentition, 
250-1-250. 
Var. PAPILLATA, Hutton (1879). 
Back with small papille. 
North Island.—Wellington (F.W.H.). 
South Island.—Tasman Bay (Quoy); Christchurch (Fereday); Grey- 
mouth (Helms) ; Dunedin (F.W.H.). 
Auckland Islands (H. Krone). 
Chatham Islands (H. Travers). 
J, MARMOREA, Hutton (1879). 
Blackish marbled with pale brown; tail rounded, obtuse. Dentition, 
258-1-258. 
South Island.—Dunedin (Bourne) ; Greymouth (Helms). 
Sec. AGNATHA, 
Jaw absent; all the teeth aculeate; the transverse rows forming an 
angle salient posteriorly. 
Fam. Streptavida. 
Animal heliciform. Shell globose or depressed. 
Genus Streptaxis, Gray. 
Shell umbilicated, globosely depressed ; the base polished ; convex ; 
striated above; the last whorl enlarged and descending ; peristome ex- 
panded, reflected. 
S. TARANAKI, Gray (1848). | 
Umbilieus moderate; peristome thin, expanded ; whorls 5. Pale horny, 
shining and white within. Diameter *64 inch. 
