JAPANESE SHELLS AND FISHES. 105 



"Wood ; while certain specimens of C. horealis from Canada and 

 the United States equally approach G. analis from Bridlington 

 and G. scalaris from the Crag. Our Crag species are deplorably 

 multiplied. 



Venus fluctuosa, Gould. 



Rather common in from 3 to 48 fathoms. 



Spitzbergen (Torell). Circumpolar. 



Varies in colour from olive-green to yellowish-white. 



Tapes decussatus, L. 



Common in 4-35 fathoms. A trapeziform variety occurs from 

 Hakodadi. Japanese as well as European specimens differ among 

 themselves in shape and sculpture ; and it is impossible to separate 

 the so-called T. indicus from T. decussatus by any other than a 

 geographical character. 



North-east Atlantic and Mediterranean. 



Tellina inflata, Stimpson. 

 Pour specimens from 5-48 fathoms. 



TJuited States (Stimjoson) ; Grulf of St. Lawrence ( Whiteaves) ; 

 Spitzbergen {Torell); Wellington Channel {Belcher). 



Lyonsia hyalina, Conrad. 

 Two specimens Irom 5 fathoms. 

 United States {Gonrad and others'). 



Allied to L. Norvegica. Both species are very distinct from 

 L. arenosa, which is circumpolar. 



Saxicava rugosAj L. ; var. arctica. 



7 fathoms; var. prcecisa, Tokooka Harbour. Ubiquitous. 

 Pore' exp. 20-1230 fathoms. 



Mya arenaria, L. 



5-48 fathoms. 

 North Atlantic. 



GrASTBOPODA. 



Tectura testudinalis, Miill. 



Everywhere from the shore to 7 fathoms. 



Circumpolar, and North-east America. 



I cannot detect any difference between this species and T. 

 patina of Eschscholtz, notwithstanding Middendorff's ingenious 

 distinction as to the sculpture. 



Lepeta c^ca, MilU. 

 Erom 4 to 48 fathoms. 



