THE 



JOURNAL OF MALACOLOGY. 



No.2. June 30th, 1902. Vol. IX. 



NOTES ON THE BRITISH SPECIES OF BUCOINUM, 

 FUSUS, ETC. 



By J. T. MARSHALL. 



Cassidaria tyrrhena, Chemn. — -Since my account of this species was 

 published {^), Mr. F. W. Wotton has obtained several very fine 

 living specimens which were obtained by trawling off the south-west of 

 Ireland in 50-60 fathoms, two of which he very generously presented 

 to me. His largest specimen measured 3j-in. by 2|-in.,and contained 

 the animal still showing signs of life. I have another fine specimen 

 exceeding 3-in. by 2 -in., dead but perfect, trawled in 50 fathoms 

 south of the Scilly Islands in 1900. A fragment w^as dredged by the 

 "Porcupine" Expedition of 1870 on the Channel slope off the Scillies in 

 539 f , and another fragment of 0. ecliinophora by the 1869 expedition 

 off Donegal Bay in 183 f. Mr. E. A. Smith has conclusively shown C'^) 

 that Morio, Montf., has the preferential claim for recognition over 

 Cax><i(laria, if the coleopterists will only adopt some other name than 

 the former for the beetles. 



BucciNUM UNDATUM, L. — This is a most instructive species, no other 

 affording better evidence of the effects of environment. Any one 

 interested in the variation of species will find the study of this one 

 most fruitful and interesting, while a series from various localities and 

 depths will impart a good-object lesson in the variability of species. 



(i) Jou n. Co ich. , 1893, vol. vii, o. 260, and 1894, p. ^80. 

 (2) Joarn. Malac, 1895, vol. iv, p. 11. 



JouRN. OF Mai.ac, igo2, vol. ix, No. 2. 



