100 TUB NAUTILUS. 



A NEW SPECIES OF CAPULUS FROM CALIFORNIA. 



BY W. II. DALL. 



Mrs. T. S. Oldroyd, of Los Angeles, Cal., recently sent me a 

 species of Capulus which appears to be new, and which adds to the 

 fauna of California a genus not hitherto known to belong to it. 



Capulus californicus u. *p. 



Shell only moderately elevated, oval or more or less conformable 

 with the object upon which it roosts, (he apex small, somewhat later- 

 ally compressed, incurved almost symmetrically, nearly concealing 

 the smooth, one-whorled nucleus, situated near the posterior margin ; 

 surface nearly smooth, somewhat irregular, mesially with small faint 

 radial not very close-set ridges, covered witli an imbricated dense 

 soft glistening periostracum which projects beyond the margins ; in- 

 terior polished, white, with faint rosy rays extending from the apex 

 to the anterior margin ; Alt. 10, Ion. before the apex 30, behind it 

 5.5, total basal length 36.5, average width 29 mm. 



This fine shell was found on the flat valve of Pecten diegcnsis 

 Dall (floridus Hinds non Gmelin), in 20 to 25 fathoms off San 

 Pedro, California. 



Carpenter reported some fragments of Gapnhis from Mazatlan, but 

 these were not really sufficient to establish the presence of the genus. 

 The present species is related to C. culyptra Martyn. of Japan, and 

 C. htnujoricus of the northeast Atlantic. It is less elevated than 

 either, tlie sculpture is much fainter than in C. hunyaricus and the 

 apex is less conspicuous, more posterior and less coiled. 



I have several times received a small shell collected among kelp 

 roots and variously mottled or tinted with purple or reddish-brown 

 and yellow. A very young specimen of this kind was described by 

 Carpenter under the name of Pgep/iis telliiin/l!s. It is not a Psepiiis 

 but has the characters of Petrirvla. I have suspected for a long time 

 it was the young of .P. carditoides, but have not yet seen enough 

 material to make, this certain, and therefore suggest that Pacific 

 coast students should endeavor to solve the problem. 



MOLLUSCA ASSOCIATED WITH MASTODON REMAINS. 



I have received from Dr. Arthur Mead Edwards, the well-known 

 microscopist of Newark, N. J., certain Molluscan forms for deter- 



