438 GASTROPODA. [Pectinibraitchia. 



Type in ray collection : of 0. saxatilis. in the Dominion Museum, 

 Wellington. 



Hab. - - Takapuna. from sand in rock-pockets (R. Murdoch): 

 Plimmerton, Cook Strait ; Bay of Islands ; Lyall Bay. typo (A. 

 Hamilton). 



Genus 3. ALCIRA, H. Adams, 1860. 



Alcira, H. Ad.. P.Z.S.. 1860, 450. Type : .-1. elf'/nns, H. Adams. 



Shell fusiform, thin, spire produced ; whorls spirally striated 

 or ribbed, rarely smooth ; aperture ovate ; columella truncate, with 

 a single oblique fold anteriorly ; outer lip thin, smooth internally, 

 posteriorly expanded, and with the anterior margin sometimes crenu- 

 lated. 



The type is the only species recorded by Try on, occurring at the 

 Cape of Good Hope. 



Fossil in the Pliocene of New Zealand. 



KEY TO SPECIES. 



A. Height of spire equal to that of the aperture, or a little more. 



a. Surface smooth ; outer lip a little thickened . . . . lirriijuta. 



(in. Surface sculptured. 



b. Penultimate whorl with 4-5, body-whorl with 12-14 



cinguli, crossed by growth-lines ; suture simple . . sulcato. 

 bb. Penultimate whorl with t>-7, body-whorl with 1(>-20 

 cinguli, and low irregular axial riblets ; suture mar- 

 gined . . . . . . . . . . Stiff ri. 



B. Height of spire H times that of the aperture. 



n. Whorls shouldered, spirally sharply ridged ; suture bimar- 



ginate . . . . . . . . . . . . ini'julfi///. 



a<t. Whorls flatly convex. 



b. Surface smooth ; outer lip thick . . . . . . xttngui-ttea. 



bb. Surface with spiral ribs ; outer lip sharp . . . . transitans. 



C. Height of spire twice that of the aperture. Surface smooth or with 



cinguli and deep grooves ; suture canaliculate ; outer lip 



inside with a few denticles . . . . . . . . rnrians. 



1. Alcira angulata, Suter, 1908. Plate 19, fig. 23. 



Alcira angulfita, Suter, P. Mai. S., viii, 1908, 181, pi. 7, f. 9. 



Shell small, elongate -fusiform, turreted, spirally ribbed, fulvous. 

 Sculpture : The protoconch smooth, all the succeeding whorls sharply 

 spirally ridged ; 2 fine spiral threads on the shoulder, the ripper close 

 to the suture, a third strong spiral cord upon the angle of the whorls, 

 and 3 smaller ones below, the lowest fine and margining the suture ; 

 the spiral ornamentation is continued over the whole of the body- 

 whorl, the spirals on the base being closer together ; interstices above 

 the base slightly broader than the cinguli, with fine growth-lines. 

 Colour yellowish-brown, the base lighter. Spire elevated, conic, tur- 

 riculate, about 1| times the height of the aperture. Protoconch conical, 

 smooth, of 2 whorls, the nucleus small, the second whorl relatively 

 high. Whorls 6i, regularly increasing, distinctly shouldered, lightly 



