SCISSURELLA. 285 



variety was found by Mr. Waller in Shetland. Believing 

 the S. aspera of Philippi to be the same species as 

 S. angulata of Loven, and that the latter is merely a 

 large form of S. crispata, I will venture to give the 

 Calabrian tertiaries as the only known locality for this 

 shell as fossil. Loven and others have dredged the 

 present species on the Norwegian coasts, at depths 

 varying from 30 to 100 f., Moller and Torell in Green- 

 land, and the latter at Spitzbergen also ; Martin ob- 

 tained it in the Gulf of Lyons, and Benoit in Sicily. 



Dr. Fleming discovered in 1809 this remarkable little 

 shell on the shore at Noss Island in Shetland after a 

 storm; he sent specimens to Colonel Montagu, who 

 pronounced them to be the fry of a Trochus. It was 

 procured in a living state by Mr. Barlee on several 

 occasions; but, unfortunately, he never observed the 

 animal. This deficiency has been in some measure 

 supplied by Professor Barrett, who in company with 

 Mr. M f Andrew dredged a live specimen at Hammerfest. 

 His description and figure in the ' Annals of Natural 

 History ' for February 1856, aided by the dried remains 

 of the animal in specimens received from Mr. Barlee, 

 have enabled me to give a short, though meagre, account 

 of the soft parts. Barrett remarked that " no part of 

 the animal was external to the shell. When it was 

 placed in a glass of sea- water, it crawled up the side, 

 and scraped the glass with its tongue. After immersion 

 in spirit it became inky-black." Apparently the fry 

 have no slit, a condition similar to that which exists in 

 the Fissurellida and Haliotidce. 



S. angulata probably bears the same relation to 

 S. crispata, as Chiton nagelfar or C. abyssorum does to 

 C. Hanleyi. Sowerby named our shell (perhaps from 

 inadvertence, or a typographical error) S. crispa. 



