PLEUROTOMA. 381 



num costatum is P. septangularis. The present species 

 is probably Fusus fasciatus, F.pyramidatus, and F. cras- 

 sus of Brown, and the young his F. minimus ; Hanley 

 described it as P. Metcalfei, and Leach as Mangelia Pen- 

 nantiana. 



P. lineolata (Mangelia lineolata, Risso) = P. multi- 

 lineolatum, Desh.= Fusus lineatus, Brown, is a Mediter- 

 ranean and Adriatic shell, closely allied to P. costatum ; 

 it was described and figured by Leach as Mangelia lineata 

 and recorded from Cork on the authority of Dr. Drum- 

 mond. 



P. proximum (Murexproximus, Mont.) isWest-Indian. 

 Laskey pretended to have found it on "Tyningham 

 sands, near D unbar " The specimen in the British 

 Museum, marked " mus. Montagu," however, is a worn 

 P. nebula, and quite unlike the description and figure 

 given by the author. 



4. P. RUGULO'SA*, Philippi. f| - $o . 



P. ruguhsum, Phil. Moll. Sic. ii. p. 169, t. xxvi. f. 8. 



SHELL at first sight mistakeable for a small and stumpy P. 

 costata ; but the following characters will serve to distinguish 

 it. The present species is more solid, and has a broader base 

 and shorter spire ; the ribs are thicker, and angulated near the 

 top of each whorl, so as to give a turreted appearance to the 

 shell ; another and peculiar difference is that, instead of the 

 spiral strise being uniform, some of tbem are larger and more 

 raised than the rest, viz. about a dozen on the body- whorl, and 

 4 on the preceding whorl ; the colour is tawny, or yellowish- 

 white, with sometimes an obscure reddisb-brown band on the 

 periphery ; the whorls are only 7 in number, and end abruptly; 

 the canal is truncated ; and the outer lip is remarkably thick, 

 and never has a ledge on the inside. L. 0*25. B. 0*125. 



HABITAT : Bay in St. Merryn Parish, Cornwall (Hoc- 



* Slightly wrinkled. 



