414 LIST OF LABRADOR MARINE ANIMALS. 



C. pinnulatum Conr. Very common, and as large as usual ; with 

 the preceding species. 



Serripes grcenlandicus Beck. This is a very abundant species, 

 and is a very constant companion of Cardium islandicum, occurring 

 in a mixed sand and mud bottom in 10-20 feet, where it grows 

 to an enormous size. 



It varies considerably when old, some specimens being triangu- 

 lar and flattened, with the beaks placed far anteriorly, while other 

 shells are ventricose, oval, with the beaks very central. The 

 young all agree in being short and high, very thick and in 

 having the large swollen beaks placed nearly in the middle of the 

 shells. Some specimens from Greenland differ very much from 

 the Labrador she] is in being very triangular, not much longer than 

 high, and having the beaks small and flattened, and placed far 

 anteriorly. Were there nut others approaching very closely to 

 some Labrador forms, these characters would easily separate the 

 grcenlandicus into two representative species. 



Tapes fluctvx>sa Sby. One valve from the Bank. 



Mactra solidissima Chemu. One valve was given me, which 

 was taken three miles inland from the mouth of Esquimaux River 

 on a sand beach. 



31. polynema Stm. (M. ovalis Gould.) Rarely thrown up on 

 beaches. 



Mesodesma Jauresii Joannis. It is thrown up very abundantly 

 on beaches, of a very large size. 



Macotna fusca Stm. Common between tide marks. 



M. sabulosa Stm. (T. proxima.) Very large and abundant in 

 15 feet Salmon Bay. 



Solenensis Linn. Rarely taken. Young dredged in 15 feet. 



Thracia Conradi Couth. One small specimen was dredged. 



T. myopsis Beck. A fine large specimen was dredged in 10 feet 

 mud. 

 Pandora trilineata Say. A few specimens occurred in 15feet sand, 

 Pandorina arenosa Moll. One valve was taken with the pie- 

 ceding among nullipores in strong sand, 15 feet. 



Cyrtodaria siliqua Daudin. In from 15-50 feet Mostly on bard 

 s tony bottoms. 



Mya truncata Linn. The short obliquely truncated variety- 

 uddevallensisit it should not be considered a distinct species, occur- 

 red on the Bank. 



M. arenaria Linn. Abundant. 



