258 FISSURELLIDiE. 



Habitat : Hard ground, from 25 to 90 f., in Shet- 

 land and the west of Scotland, being rather plentiful 

 in the latter district ; Aberdeen (Macgillivray) ; Nor- 

 thumberland and Durham (Alder, King, and others) ; 

 Scarborough (Bean); co. Antrim (Hyndman, Waller, 

 and J. G. J.). The specimens, however, from the last- 

 mentioned locality are probably relics of the glacial 

 epoch, and not recent. The variety is rare; it oc- 

 curred in my Shetland deep-water dredgings. T. Noa- 

 china is tolerably common as a fossil in the Clyde beds ; 

 also at Fort William (J. G. J.); Bridlington (S. Wood); 

 Kelsey Hill, Yorkshire (Darbishire) ; Uddevalla (Hi- 

 singer); older glacial formation at Christiania, 400-440 

 ft. (Sars) . It inhabits every part of the sea north of 

 Great Britain, from Gottenburgh (Malm) to Spitzbergen 

 and North Greenland (Torell), at depths of from 4 to 

 150 f . ; Canada (Bell); Maine (Mighels); Massachusetts, 

 frequently in the stomachs of fishes (Gould) ; New Eng- 

 land, 20-30 f. (Stimpson) ; and the variety has been 

 taken also from the stomachs of fishes caught in 40-75 f., 

 nearly 100 miles seaward from Casco bay. 



Fabrioius noticed the difficulty of keeping this mol- 

 lusk alive when taken from its native habitat. In the 

 young shell the slit is almost marginal, but recedes 

 further from the edge in the course of growth. 



The synonyms are somewhat numerous, viz. Patella 

 fissurella, Miiller ; Sipho striata, Brown ; and Rimula 

 Flemingii, Macgillivray, who gives the following reason 

 for that cognomen : — " One malacologist has named it 

 after Noah, another after Dr. Fleming. I am unable to 

 determine the priority, and therefore take the living 

 godfather.^^ Leach had called it Cemoria Flemingiana. 

 The fry is the Patella Zetlandica of Fleming. 



