GASTEROPODA. 25 



1. Aporrhais PES-PELiCANi. Linn. Tab. II, fig. 4, a — h. 

 Strombus PES-PELICANI. Linn. Syst. Nat. p. 1207, 1767. 

 TsiTONiUM PES-PELicAXi. Miill. Zool. Dan. prod. p. 244, 1776. 

 Aporehais quadrifidus. Da Costa. Brit. Conch, p. 136, t. 7, fig. 7, 1778. 

 RosTELLARiA PES-PELICANI. J. Sow. Min. Gonch. t. .558, 1827. 



— Dubois de Montp. Conch, foss. du Plat. Volhyn. Podol. pi. 1, 



fig. 31, 1831. 



— Nyst. Coq. foss. de Beige, p. 561, pi. 43, fig. 7, 1844. 

 Chenopus pes-pelicam. Phil. En. Moll. Sic. p. 215, 1836. 



Aporrhais pes-pelicani. S. Wood. Catalogue 1842. 



— Morris. Cat. of Brit. Foss. p. 138, 1843. 



A. Testa turritd ; anfractibus convexis, subangidatis, medio nodulosis, striatis ; labro 

 dilafafo, in tres digitos partito ; diffitis divaricatis, canali, elongato, obliquo. 



Shell turreted, with 10 — 11 conve.x volutions, covered in the centre with small 

 nodules ; transversely striated ; outer lip digitated, and separated into three sharp 

 digitiform processes, one of which runs up the spire ; base of volution angulated ; 

 canal produced and curved. 



Axis, i inch. 



Locality. Cor. Crag, Ramsholt and Gedgrave. 



Red Crag, Sutton, Ncwbourn, Brightwell, and Bawdsey. Recent, British Seas. 



This shell is rarely found in good condition in the Red Crag ; some well-preserved 

 specimens, however, show a perfect identity with the long known recent species. 

 The middle of the volution is slightly angular and nodulous, so also is the prominent 

 keel at the base of the whorl, like that of the recent shell, with another ridge beneath 

 it. Tlie strise are obliterated fi-om all my Red Crag specimens, though shown in those 

 from the Coralline. This is a living Mediterranean species, and stated by Philippi to 

 be exceedingly variable there. My Crag specimens are very uniform in character. 



Terebra,* Adanson, 1757. 



Terebka. Lam. 

 Subula. BlainviUe. 



Gen. Char. Shell subulate, turriculate, generally much elongated, with an acumi- 

 nated apex; volutions numerous ; aperture comparatively short, ovate ; base emarginate, 

 with or without a canal ; outer lip thin ; columella often oblique and spiral, sometimes 

 striated ; many species have a corneous operculum. 



This as a recent genus is abundant in species, and is nearly confined to the tropical 

 seas. Mr. J. E. Gray has separated several recent species included by Lamarck in this 

 genus, in consequence of a difference in the animal, and united them into a distinct 

 group, under the name of Bullia. There are no good generic characters in the shell 

 of Bullia by which it can be distinguished, although its general form is intermediate 

 between the elongated Terebrse and some of the Nassas. 



* Etvm. Terelro, to bore. 



