60 



at tbe upper part. ; a sinus in the right lip. Operculum 

 hornv. 



* T. TEREBRA. Turbo T. Turt. Lin. Pen. Brit. Zo., 

 vol 4, pi. 81, fig. 113. Mont. Test. Brit., vol. 2, p. 293. 

 Turritella T. Fiem. Brit. An., p. 302. Sparingly along 

 the south coast, from the Land's-end. 



* T. ELEGANT1SSIMA. Turbo E. Mont. Test. Brit., 

 vol.2, p. 298, pi. 10, fig. 2. Turritella E. Flem. Brit. 

 An., p. 303. Montagu found it not uncommon in sand 

 from Falmouth harbour, and I have obtained it from the 

 Land's-end. 



T. NITIDISS1MA. Turbo N. Mont. Test. Brit., vol. 2, 



p. 299, pi. 12, fig. 1. Fiem. Brit. An., p. 304. Montagu 



found it in sand from Falmouth harbour. 

 T. UNICA. Turbo Albidus. Turt. Lio. T. U. Mont. 



Test. Brit., vol. 2, p. 299, pi. 12, fig. 2. Turritella U. 



Flem. Brit. Ann., p. 303. Rare. In sand from Falmouth, 



by Montagu. 



CANALIFERA. 



The shell with a canal, variable in length, at the base of 

 the aperture, the right margin of which does not alter by age. 

 An operculum. The first division, with no constant wart on 

 the right lip. 



CERITHIUM. 

 GENERIC CHARACTER : The shell turreted, aperture 



short, oblong, oblique, the bottom ending in a short or 



curved canal, never notched. A slight channel at the 



upper extremity of the right lip. Operculum small, 



roundish, horny. 

 C. COSTATUM. Strombos C. Mont. Test. Brit., vol. 1, 



p. 225. C. C. Flem. Brit. An., p. 357. Very rare. 



Da Costa found it in Cornwall. 



* C. LIMA. Mures Reticulatus. Mont. Test. Brit., vol. 1, 



p. 272. Terebra R. Flem. Brit. An., p. 346. C. Lima, 

 Mr. Forbes: a specimen kindly named by him for me. It 

 is abundant in shell sand near Looe, Fowey, and from the 

 Land's-end ; but I have no where seen it so large as on a 

 heap of sand from the river below Truro. 

 PLEUROTOMA. 

 GENERIC CHARACTER: The shell turreted or fusi- 

 form, ending below in a straight canal, more or less 

 lengthened ; a fissure in the upper part of the right lip. 



* P. SINUOSA. Murex S. Mont. Test. Brit,, vol, 1, 

 p. 264. Flem. Brit. An., p. 354. In shell sand, near 

 Looe, and from the Lanu's-end. 



FUSUS. 

 GENERIC CHARACTER: The shell somewhat spindle- 

 shaped, channelled at the base, swelling in the middle or 

 below; no external protuberances; spire elevated and 



