138 Transactions.— Zoology. 
Animal.—Body elongated, the eye-peduncles long and thick, tentacles 
moderate ; foot very long and narrow, compressed, not tapering, truncated 
posteriorly and with a caudal gland; mantle slightly reflected. Colour 
variable—(a.) Entirely slate-grey, or reddish-brown, (b.) upper parts slate- 
grey, foot yellowish speckled or marbled with grey, (c.) white with a few 
black spots, the upper anterior parts of the body, except a pale band on the 
top of the head, slate-grey. 
Dentition, 25-1-25. Jaw ribbed. 
Hab. Greymouth, sent by Mr. R. Helms, after whom I have much 
pleasure in naming it. 
ZONITES (?) FULMINATA, sp. nov. 
Shell depressed, very narrowly umbilicated, striated ; colour pale horny 
with numerous longitudinal zig-zag red bands on the body-whorl, which 
show only as irregular radiating bands on the spire. Spire slightly convex ; 
whorls 54, slowly increasing, rounded, smooth, with a fine striation of 
growth-lines; suture impressed ; umbilicus very narrow, almost covered up 
by the reflected columellar margin of the peristome ; aperture subvertical, 
transversely lunately rotund : peristome thin, regularly arched, columellar 
lip callous, reflected. Greatest diameter 0°34, least 0-27, height 0-23. 
Dentition, 38-1-88. Jaw ribbed. 
These two species differ from Zonites in the jaw, I propose to put them 
in a new genus to be called Phacussa, 
This species appears to approach H. venulata, Pfeiff., which I have not 
seen; but that shell is said to be imperforate, downy, and differently 
coloured from this one. 
Hab. Stewart Island (Mr. T. Kirk, a single specimen), 
Sec. AGNATHA. 
Ruyripa PATULA, sp. nov. 
Shell depressed, umbilicated, thinnish, translucent, scarcely shining, 
finely malleated ; colour brown, yellowish at the apex. Spire rather convex, 
obtuse; whorls 81-4, rapidly inereasing, rounded, the first 21 transversely : 
plaited, the remainder with numerous small longitudinal depressions, and a 
few obsolete broad spiral grooves near the periphery; under the lens finely 
spirally striated ; last whorl very large, the last quarter occupying more 
than half the diameter of the shell, the base evenly rounded; suture im- 
pressed: umbilieus rather narrow: aperture very large, oblique, oblong- 
oval; peristome slightly thickened, the right margin descending, columellar 
margin reflected over the umbilieus, but not covering it. Greatest diameter 
0-9, least 0°63 ; height 0-4; breadth of aperture 0:5. 
Animal.—Foot broad, flattened, and acutely pointed behind, the margin 
minutely crenulated, tail extending beyond the shell; no caudal gland, nor ; e 
