36 ROYAL SOCIETY OF CANADA 



Coluiabia in which search has been made. At Vesuvius Bay. I ohtained 

 very line specimens from the burrows of Penitella pem'ta. In many 

 cases the dead Penitella inclosed Saxicava rugosa, also dead, and con- 

 taining in its turn numerous specimens of Kellia. 



The variety Ghironii is characterized by Carpenter as " thinner, less 

 transverse, margins rounded," but the shells of this species are so verj' 

 variable in shape that it seems hardly necessary to apply a separate 

 name to a particular form. 



Fine specimens of K. Laperousii frequently exceed 25 mm. in length. 



48. Kellia suborbicularis, Montagu, sp. 



Mya saborbivularis, Mont., Test. Brit., p. 5(54, and suppl. p. 39, pi. xxvi., tig. 6 

 (1803 and 1808). 



This does not appear to be so common a shell as the last named, 

 but I think that in many cases it may have been passed over as the 

 young of Laperousii. 



I have found the two species together at Victoria and Salt Spring 

 Island, and Dr. Dawson dredged it in several localities near the Queen 

 Charlotte Islands. 



PYTHINA, Hinds. 



49. Pythina rugipera, Carpenter. 



Kept. Brit. Assoc, 1863. p. 643 (August, 1864) ; and Proc. Acad. Nat. Sci. Phila., 

 1865, p. 57. 



This species was described from two living specimens obtained by 

 Dr. Kennerley in Puget Sound. IS^o other specimens have been found 

 80 far as I am aware. 



LEPTON, Turton. 



hO. Lepton rude. Whiteaves. 

 Kept. Prog. Geol. Surv. Canada, 1878-79, p. 198b, fig. 2. 



This curious shell is not uncommon on muddy shores, where it is to 

 be found attached to the ventral segments of a crustacean, Gebia Puget- 

 tensis. 



The prawn in question is a common species, but in most localities 

 only a small percentage will be found with the attached Lepton. 



LAS^A, Leach. 



51. Las.ea rubra, Montagu, sp. 



Cardium rubrum, Mont., Test. Brit., Suppl. p. 83, pi. xxvii., fig. 4 (1808). 



Common near Victoria, generally at the roots of seaweed in tide 

 pools. Dr. Kennerley obtained a single specimen of this species in Puget 



