52 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



1. Turritella (Colposi>ira) Smithiana, n.sp. PL Y, Figs. 1-1 c. 



Shell small, turreted. Apex blunt, protoconch consisting of about two 

 smooth, rounded Avhoiis. Whorls eleven or twelve, convex or slightly 

 angular, increasing gradually. Ornamentation consisting of four 

 strong keels with an additional one on the body- whorl, and numerous 

 fine threads on the base and between the keels. Aperture imperfectly 

 known, apparently sub-quadrate, rather longer than wide, slightly 

 channelled below. Inner lip reflected on the body-whorl. Outer 

 lip, as indicated by the lines of growth, possessing a deep and rather 

 wide sinus situated between the second and fourth keels, but not 

 limited by either. Columella nearly straight, being but slightly 

 curved. Umbilicus closed. Base rather convex. 



The largest specimen, which is nearly entire and consists of eleven 

 whorls, is 9*5 mm. in length and about 3 mm. in width. Another 

 would be larger if perfect, but the body-whorl is broken. The sinus 

 of an individual measuring about 2-5 mm. in width is about 1*25 mm. 

 in depth, as indicated by the lines of growth : it would probably be 

 deeper if the lip were entire. 



Dredged byH.iM.S. "Challenger" off Sydney, at a depth of 410 fms. 



Mr. Edgar Smith had marked this as a new species, therefore 

 I name it after him. There are about forty-two specimens in the 

 British Museum (Natural History), nearly a dozen of which are 

 fragments, and none have the aperture entire. They are all dead 

 shells, and of a creamy-white colour. There are fifteen examples 

 with the protoconch, but none of them show its junction with the 

 succeeding whorls very clearly. The one figured is slightly worn at the 

 junction, and the post-embryonic shell probably began rather sooner 

 than appears. The whorls vary slightly in angularity according to 

 the prominence of the central keel. This species is distinguished from 

 most of the other members of the group by the less flattened whorls 

 and the five strong keels. The sinus also is rather wider in proportion 

 to the size of the shell than .that of T. aceisa and T. runcinata. 

 In this feature, as well as in the form and ornamentation of the 

 whorls, it agrees with C. Godeffroyana, from which it differs in its 

 smaller and more slender form, and in having an extra keel. 



2. Turritella (Colrospira) crenulata, n.sp. PI. V, Pigs. 2-2b. 



Shell very small, turreted. Protoconch composed of about two smooth, 

 convex whorls. Whorls eleven, gradually increasing, flattened and 

 somewhat quadrate in form. Ornamentation beginning immediately 

 after the junction with the protoconch ; it consists of four keels, of 

 which the three uppermost are strongly and the lowest but slightly 

 crenulated, the third keel is the strongest. There are also numerous 

 fine threads on the base. Aperture imperfectly known. A deep sinus 

 in the outer lip is indicated by the lines of growth, situated between 

 the first and third keels. Inner lip reflected on the body-whorl. 



Length 6-5, width 2 mm. 



Dredged by the " Challenger" off Sydney in 410 fms. 



