188 Transactions. — Zoology. 



Animal. — Body elongated, the eye-pedimcles 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. E. 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 5^, 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 Innately rotund ; peristome thin, regularly arched, columellar 

 lip callous, reflected. Greatest diameter 0-34, least 0-27, height 0-23. 



Dentition, 38-1-38. Jaw ribbed. 



These two species differ from Zovites 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. 



Ehytida patula, sp. nov. 



Shell depressed, umbilicated, thinnish, translucent, scarcely shilling, 

 finely malleated ; colour brown, yellowish at the apex. Spire rather convex, 

 obtuse ; whorls 3J-4, rapidly increasing, rounded, the first 2{- 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 : umbilicus rather narrow : aperture very large, oblique, oblong- 

 oval ; peristome slightly thickened, the right margin descending, columellar 

 margin reflected over the umbilicus, 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 crenulatecl, tail extending beyond the shell ; no caudal gland, nor 



