240 ROYAL SOCIETY OF CANADA 



116. Mya arenaria, Linm'. 



Now the commonest cl:im in southern British Cohimbia. It occurs 

 nearer hi^h-wîiter mark than the species of Macoma. 



121. Penitella penita, Conrad. 



122. Penitella ovoidea, Gould. 



I have lately collected numbei*s of these shells, which occur together 

 in shale on Newcastle Island, near Nanaimo. They are quite distinct, 

 and may be easily separated, as pointed out by Carpenter and Whiteaves. 



In P. penita the umbonal reflexion is closely adherent (Carpenter), 

 and the siphonal tube has the epidermis wrinkled but not tuberculated 

 (Whiteaves). In P. ovoidea, on the other hand, the umbonal reflexion 

 is not adherent, but there is an anterior opening (Carpenter), and the 

 siphonal tube has the epidermis strongly tuberculated (\Yhiteaves). 



P. ovoidea is also much smaller and more slender in form than P. 

 fenita. 



SCAPHOPODA. 



128. Dentalium rectius, Cpr. 



A few living specimens of this rare shell were taken by a dredging 

 party of the Natural History Societj' of British Columbia in 00 ftithoms, 

 sand, near Victoria in 1896. At the same time specimens of two species 

 of Cadulus were taken. These were recorded in error, by Dr. Newcombe 

 C" Nautilus," X, 18), as Cadulus aherrans, Whiteaves, a species that has 

 not yet been found in any other than the original locality. Dr. New- 

 combe's shells, which proved to belong to new species, have been described 

 by Dr. Dall as— 



129a. Cadulits Hepburni, Dall. 



/. c, p. 12, pi. i, fig. 13. 



12!)/>. Cadulus Tolahei, Dall. 

 /. c, p. 13, pi. i, (Ig. H. 



OAHTKKOPODA. 



PTEKOPODA. 



In my former paper only one species of Pteropod is recorded, viz., 

 Cavolina tridentata, Forsk. A second species is added in Dr. Newcombo's 

 list of the raoUusca in the British Columbia Museum — 



