36 ROYAL SOCIETY OF CANADA 
Columbia in which search has been made. At Vesuvius Bay, I obtained 
very fine specimens from the burrows of Penitella penita. In many 
cases the dead Penitella inclosed Saxicava rugosa, also dead, and con- 
taining in its turn numerous specimens of Æellia. | 
The variety Chironii is characterized by Carpenter as “thinner, less 
transverse, margins rounded,” but the shells of this species are so very 
variable in shape that it seems hardly necessary to apply a separate 
name to a particular form. 
Fine specimens of K. Laperousii trequently exceed 25 mm. in length. 
48. KELLIA SUBORBICULARIS, Montagu, sp. 
Mya suborbicularis, Mont., Test. Brit., p. 564, and suppl. p. 39, pl. 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 RUGIFERA, Carpenter. 
Rept. 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. No other specimens have been found 
so far as J am aware. 
LEPTON, Turton. 
50. Lepron RUDE, Whiteaves. 
Rept. Prog. Geol. Sury. Canada, 1878-79, p. 1988, 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 Zepton. 
LASÆA, Leach. 
51. Lasma RuBRA, Montagu, sp- 
Cardium rubrum, Mont., Test. Brit., Suppl. p. 83, pl. 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 
