•»74 

 3. Ilatuinca (iul>ia w. sp. I'l. XXXII, li^r. S, 9. 



Stat. n. Sailus kctjil. ratcriioster-islands. 37 M. and Icss. Coral aiul coralsand. 5 Spec. 



Shell ovatc, roiiiuleilly-lrmu-ateil abovc, more contractcd below, thin, |jcllucicl, white. 

 Sciilptiire consistinjj of rather sliony;, radialinj^ striac and a few conspicuous, impressed, spiral 

 striae, at the upper and basal part of body-whorl, the inedian part of ihat whorl beinjj covered 

 with very fine, close-set spirals, only visible under a strong lens. .Spire concave, but scaicely 

 iimbilicated, (juite or nearly concealed by the cnamelloiis ])oinl <if jimrtion of the pcristome, 

 the border of the spiral excavation is rounded, the space within thai bortlcr is opatiuely-white, 

 by an internal laycr of enamel, visible at the peristomc. Aperture elonj^ate, witli raiscd, 

 rounded upper marj^in, somewhat contorted at its insortion ; outcr margin thin (broken), moder- 

 ately curved, more so above and below, narrow, comprcssed, gutter-like at the base. Columellar 

 side of body-whorl convex, with a thin laycr of enamel ; columella concave, forming a strongly 

 contorted fold at its lower part, cnding below in the basal gutter, reflected over the umbilical 

 region, which is bordered by a blunt rim of the same opaepiely-white colour as the spire. 



Alt. from v-ertex to base of apert. 11'/.,, lal. 7; apert. alt. 12'/,, lat. 3'/.2 MiH- 



Alt. from vcrtex to base of apert. lo'/^, lat. 6'/^; apert. alt. i 1 7s< '^it- 3 Mill. 



This species has much puzzled me; at last I asked the opinion of Mr. Smitii, who 

 thought it might be a /7a»ii7iea\ as however the base of aperture was quite different, I was 

 by no means certain. The prcservation of the specimens was rather bad, nevertheless I got 

 a defective radula and 3 gizzard-plates. I found many rows of teeth, the laterals (i) have a 

 subquadratc base and a simple, long cusp; as median tooth (M) I may consider a triangularly 

 rounded object, but I see no cusp. The gizzard plates are brownish, with a median keel, they 

 are many-articulated, having the appearance of a contracted, many-valved chiton ; length of 

 gizzard-plates about i , breadth about '/j Mill. These plates and the laterals are in accordance 

 with what is known of Haiiiijica, and so I have left the species in that genus, though with 

 some doubt, as the simple shape, of what I consider to be the median tooth, is more that of 

 Atys, as figured by Beiuiii in .Skmper's "Reisen im Archipel der Philippinen". The measurements 

 of latitude of shell are not quite trustworthy, as the peristomc is more or less broken, especially 

 in the largest specimen. 



Fam. HYn.\TiNiD.\E. 

 Hydatina Scluunachcr. 



I. Hydatina sp. 



Stat. 193. Sanana-bay, ICast coast of Suia Ik.si. 22 M. Mud. i .Spec. 



The shell of the only specimen has been destroyed by formol, and cannot be identified; its 

 epidermis rcminds that of //. p/iysis Lin., but the brown spiral lines are so much more crowded, 

 that it seems to be quite different; however the specimen is too much shrunkrn for description. 



22 



