122 Mr. Jeffreys on British Mollusca. 



Cardium aculeatum, ii. 4. Guernsey (Dr. Lukis). 



C. rusticum, ii. 11. Guernsey (Dr. Lukis). 



C. punctatum, Brocchi, Foss. Subapenn. ii. 666. tav. xvi. f. 11 ; 

 Philippi, Test. Sic. ii. 38. C. nodosum (Turton), B. M. ii. 22. This 

 species is not uncommon at Guernsey, and individuals are sometimes 

 found there of a beautiful pink colour. Mr. M 'Andrew has taken a 

 variety of it in Vigo Bay. The punctures in the interstices of the 

 ribs are more apparent towards the beaks, and may be easily observed 

 under a moderate magnifying power. Philippi has, in his second 

 volume, separated it from C. papillosum, and pointed out, with his 

 usual discrimination, the differences which exist between the two 

 species. I had also erroneously considered them identical in my 

 paper on Piedmontese Testacea. Brocchi's name, being prior in 

 point of date, must therefore be restored. 



C. papillosum, Poll, Test. Sic. t. 16. f. 2-4; Phil. i. 51. This 

 beautiful and very distinct species was first discovered in Guernsey by 

 Dr. Lukis, and I have since detected it in shell-sand dredged off St. 

 Martin's Port. It seems to be tolerably diffused on this part of our 

 coast, though as yet rare. The largest specimen found, and for 

 which I am indebted to the kindness of Dr. Lukis, measures upwards 

 of half an inch in length and breadth. The one figured in PI. V. 

 fig. 1 a, b, is smaller, but of a milk-white colour. Other specimens 

 are mottled with the same rosy hue that distinguishes those obtained 

 from the Mediterranean. 



C fasciatum, ii. 25. Guernsey (Dr. Lukis & J. G. J.) 



Lucina divaricata, ii. 53. Besides the locality mentioned for this 

 rare shell by Messrs. Forbes and Hanley, where I obtained by 

 dredging two single valves, I found another valve many years ago in 

 shell-sand dredged from the Cornish coast for manure. 



L. flexuosa, ii. 54. Plymouth and Guernsey. 



Clausina Croulinensis, Jeffreys, Ann. N. H. xx. 19. Lucina 

 ferruginosa, var., B. M. ii. 62. If such a thing as a species exists in 

 nature, there can be, I think, no question that this is distinct from 

 C. ferruginosa, both as regards form and texture and dentition. 

 Figures of it are given in PI. V. fig. 2 a-c. Mr. Barlee has lately 

 found it in the Shetlands, together with C. ferruginosa. 



With great deference to Mr. Searles Wood's opinion, I cannot 

 agree with him in considering his Cryptodon ferruginosum specifically 

 identical with the Lucina ferruginosa of Forbes and Hanley. His 

 specimens (which I have examined carefully and compared with ours) 

 appear to differ essentially in form, as well as in the hinge and mode 

 of dentition ; and I should be inclined to place his species generically 

 with L. flexuosa instead of with Clausina. 



Diplodonta rotundata, ii. 66. Guernsey (Dr. Lukis & J. G. J.). 



Montacuta ferruginosa, ii. 72. Guernsey (Dr. Lukis). 



M. substriata, ii. 77. Guernsey (Dr. Lukis). A more solid and 

 opake variety, in which the radiating striae or ribs are obliterated, 

 has been taken by Mr. Barlee, at a depth of 110 fathoms, in the 

 Shetlands. 



M. ? Donacina, var. cylindrica, Wood's Crag. Moll, part ii. p. 131. 



