205 



Teredo miiidaiiensis Bartsch (192,1). 



She/I. Small, transparent, white; regular in outline, similar to T. tnivalis; characterized by numerous 

 fine, close-set ridges. 



Pallets. Blade nearly triangular, with apex at insertion of stalk; distal portion not different from 

 base. The stalk expands suddenly at its free end into a distinct knob, which is the most striking charac- 

 teristic of this species. 



Type. Cat. No. 31(W7.S, United States National Museum; from Mindanao, Philippine Islands. 



Dislrihulion. Thus lar known only from the type locality. 



Genus BANKIA 



Bankia setacea Tryon (1863). Figures 74 and 75. 



Shell. Anterior lobe relatively small; auricle of medium size, its posterior margin semi-circular in 

 outline. Ridges numerous and close-set. .-interior median area nearly always suffused with brown, 

 especially dorsally. Adult shells typically much larger than any of the foregoing. 



Pallets. IJecidedly feather-like in appearance, the blade consisting of a series of cone-in-cone 

 elements which are drawn out laterally into slender projections, with a thin memlirane stretched 

 between. 



Type. Museum of the Academy of Natural Sciences, Philadelphia; from San Francisco Bay. 



Distribution. Pacific Coast, from Kodiak Island to San Diego Bay. 



Bankia iiiexieanu Bartsch (1922). 



Shell. Closely similar to that of B. selacea. 

 Pallets. Blade consisting of a series of cone-in-cone elements, the distal margins of which arc cut 

 off abruptly, without the lateral prolongations and the connecting membrane. 



Type. Cat. No. 194176a, United States National Museum; from Sinaloa, Mexico. 

 Distribution. West Coast of Mexico. 



Bankia orniiti Bartsrli (1923). 



Shell. Small, with a broad posterior median portion and an auricle of moderate size. 



Pallets. Made up of closely crowded elements, the free margins of which are much fimbriated, so 

 that each segment has a comb-like appearance. 



Type. Cat. No. 348191, United States National Museum; from Bacochibampo Bay, Sonora, Mexico. 



Bankia excolpa Barlsch (1922). 



Shell. Small, with a narrow median lobe and reduced auricle. 



Pallets. Asymmetrical, the stalk being inserted to one side of the median line; the blade made up 

 of closely apposed elements wholly or partly covered on both the inner and outer faces by a periostracum. 

 Type. Cat. No. 98763, United States National Museum; from the Gulf of California. 



The foregoing descriptions are based on specimens taken during the present 

 investigation, with the exception of the descriptions of Teredo mindanensis, Bankia 

 orcittii and Bankia excolpa, of which no specimens have come to hand. The types of 

 these three species have been examined by Dr. Miller, ho\\'e\er, who finds no reason 

 to question their ^•alidity. Brief descriptions of them have therefore been included, 

 in order that the present report may be as complete as possible. 



