130 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, 



'Porcupine' Exp. 18/0: Atl. St. 16, 17a. Two specimens, one 

 of which appears to be full-grown and the other half-sized : both 

 are now figured. 



Distribution. ' Bulldog ' Exp., Long. 5-1° 33' W., Lat. 55° 36' N. 

 (Wallich) ; 1622 fms.! A smaller specimen. I had at first mis- 

 taken it for H. rota. See 'British Conchology,' vol. iv. p. 72. 



Family XIII. Vermetid.*:. 

 >/ Siligiuaria anguina, Linne. 



Serpula anguina, L. S. N. p. 1267. 



Siliquaria anguina, Philippi, Moll. Sic. i. p. 173, t. ix. f. 24, a-e. 



'Porcupine' Exp. 1870: Med. St. off Jijeli, Rasel Amoush. 



Distribution. Throughout the Mediterranean and Adriatic, Cape 

 Verd I. ('Talisman' Exp. 1882); 30-122 fms. 



Fossil. Miocene : Vienna Basin, Switzerland, Maine-et-Loire, 

 Touraine, and Madeira. Pliocene : South of France, and Italy. 

 Post-tertiary : Pozzuoli, Sicily, Morea, and Rhodes. 



It would be interesting to know the nucleus of this curious shell. 

 I have never seen a quite perfect specimen, although the species is 

 not uncommon. In the young the spire is irregularly twisted 

 upwards and is occasionally heterostrophe, with a circular mouth : at 

 this stage of growth there is no indication of the peculiar slit. 



Family XIV. Ttjrritellid^e. 



Genus Stilbe \ Jeffreys. 



Shell forming an elongated cone, smooth, and of a glittering 

 lustre ; nucleus or apex of the spire regularly and bluntly pointed : 

 mouth somewhat angular at the base. 



Neither the soft parts of the animal nor the operculum being yet 

 known, I cannot satisfactorily assign this remarkable shell to any 

 family ; but all the characters above given agree with those of 

 Turrit ellidce. 



Stilbe acuta 2 , Jeffreys. (Plate X. fig. 2.) 



Shell stiletto-shaped, thin, semitransparent, and very glossy : 

 sculpture none, except slight and microscopic lines of growth : 

 colour milk-white : spire tapering : whorls 10, convex, very gradually 

 increasing in size ; apex somewhat compressed : suture distinct and 

 deepish : mouth oval, pointed above and below, a little dilated at 

 the base : outer lip sharp : inner lip interrupted above, reflected on 

 the pillar, behind which is a narrow slit or umbilical chink. L. 

 0'25. B. O'l. 



'Porcupine' Exp. 18/0: Atl. St. 16. One perfect specimen 

 and the lower half of auother. 



Distribution. ' Bulldog ' Exp., Long. 54° 33' W., Lat. 55° 36' N. 

 (Wallich) ; 1622 fms. A smaller specimen. 



1 2riX/3;j, splendour. 3 Pointed. 



