223 



ed. so as neaily to cover the perforation. The inner lip, ap- 

 plied to the base, extends from the columella to the suture, 

 and is smooth. 



Dim. — Height. 3 5 mm. : greatest diameter, 2*4 mm. 



Locality. — 300 fathoms, off Cape Jaffa, 10 dead. 



Diagnosis. *^~Tt approaches .S'. degans^ Jeffreys, Proc. 

 Zool. Soc, 1876, p. 200 : Tryon, Man. Conch., vol. ix., p. 47, 

 pi. viii., fig. 75 : but is rtistinct in having the sutural sinus 

 with a much smaller lamina between it and the suture, the 

 sloping part of the spire-whorls longer, a different relation of 

 the angulation and carinae to sinus, and a less production of 

 the baso-labral angle. It is also very similar to Segirenzia 

 monocinrjnlata , Seguenza, as figured by Dall. in Bulletin 37, 

 1889, of'the United States Nat. PTist. Mus., p. 142, pi. Ixii., 

 fig's. 88-89 : but the sinuses in the aperture are different. They 

 differ greatly, however, in the two figures given, so this 

 species may prove eventually only a variety. 



Genus SrPHOiSiARfA, Sowerby. 

 Siphonaria stowae, sp««. nov. PL viii., figs. 3 to 8. 



Shell small, moderately solid, oval, depressed. Apex sub- 

 terminal one-eighth distant from posterior end, slightly to 

 the left of the mid-line, oblique, inclining backwards from 

 the central line, pointed and slightly projecting posteriorly. 

 Posterior end nearly vertical, slightly concave. Dorsum sub- 

 convex, more rapidly descending anteriorly. Left margin 

 straightiy convex : right more rounded, faintly bulged at the 

 site of the siphon, just in front of the middle point. Nume- 

 rous subdistant rather rude ribs, equal in width to the inter- 

 spaces, m.ultiplying by frequent intercalations; rough, irregu- 

 lar growth lines. Interior smooth, margin invalidly crenu- 

 lated. Ornament, ribs opaque white; dark brown specks, 

 lines, and blotches, chiefly intercostal, plainer on the right 

 side ; internally light horn tint, a chestnut horseshoe around 

 the posterior third, and broken blotches on each side of the 

 siphon. 



Dim. — Length, 7'5 mm. ; breadth, 5*9 mm. ; height, 3'25 

 mm. The radula contains about 94 rows of teeth, each con- 

 sisting of a central denticle, with about 22 laterals on either 

 side. The rachidian is narrow, with a small cusp tending to 

 be bilobed. The laterals have large sim])le cusps, and these 

 as v/ell as the teeth grow gradually smaller the further they 

 are from the centre. (Figs. 6, 7, 8.) 



Hah. — Pondolowie Bay. in Spencer Gulf, on rocks above 

 tide mark : 9 examples, alive. Fry in siiell sand. King's 

 Point, Encounter Bav (^Miss Stow). 



