GASTEROPODA. 25 



1. Aporrhais pes-pelicani. Liun. Tab. II, fig. 4, a — b. 



Strombus pes-pelicani. Linn. Syst. Nat. p. 1207, 1767. 

 Tritonium pes-pelicani. Mull. Zool. Dan. prod. p. 244, 1776. 

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

 Rostellaria pes-pelicani. J. Sow. Min. Conch, t. 558, 1827- 



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



fig. 31, 1831. 



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

 Chenopus pes-pelicani. 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, subangulatis, medio nodulosis, striatis ; labro 

 dilatato, in tres digitos partito ; digitis divaricatis, canali, elongato, obliquo. 



Shell turreted, with 10 — 11 convex 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, \ inch. 



Locality. Cor: Crag, Ramsholt and Gedgrave. 

 Red Crag, Sutton, Newbourn, 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. The strise are obliterated from 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. 



Terebra. Lam. 

 Subula. Blainville. 



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

 nated apex ; volutions numerous ; aperture comparatively short, ovate ; base emar- 

 ginate, 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. B. 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 cha- 

 racters 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 Nassae. 



* Etym. Tereuro, to bore. 



4 



