358 TEREBRATULID^. 



loops, one on each side, which, folding back again, unite 

 in a single very ample loop above. 



The recorded size of one of the examples described by 

 Montagu, was an inch and an eighth from the beak of the 

 larger valve to the ventral margin, and seven-eighths of an 

 inch when measured from side to side. These dimensions 

 somewhat exceed those of an individual, full-grown to all 

 appearance, that we received from the north of Europe, 

 which only measured eleven lines and a half by nine and 

 two-thirds. 



The discovery of this species as a British production, is 

 due to that veteran naturalist, Dr. Fleming, who forwarded 

 an account of his obtaining a group of three individuals 

 (we presume the one delineated in his Philosophy of Zoo- 

 logy) to Col. Montagu, who described the shell at large 

 in the eleventh volume of the Linneean Transactions. He 

 had obtained it from a cod-line in deep water to the 

 eastward of Bressay in Zetland. Our own drawing is 

 copied from the figure in the last-named work, aided by a 

 Swedish example, for as two out of the three original types 

 have been lost (those given to Leach and Montagu) the 

 liberal discoverer has not unwisely refused to trust the 

 unique British example still left him, to the risks attendant 

 upon its transit from Scotland. 



We entertain but little doubt that the Anomia Tere- 

 hratida of Turton's Conchological Dictionary, all mention 

 of which was omitted in his subsequent work on British 

 Bivalves, was identical with this species, which the Doctor 

 at that time, by his own confession, had never seen. His 

 reference for a figure is to Da Costa's Elements of Conclio- 

 logy, pi. 6. fig. 3 (probably the nearest likeness to the 



