442 bulletin: museum of comparative zoology. 



dorsal valve, a feature cliaracteristic of no other described recent species. It is 

 named in bouor of Dr. Hermann Strebel of Hamburg, Germany, whose admirable 

 contributions to the knowledge of the MoUusca of the Antarctic region aud 

 Mexico are known to all malacologists. 



In this connection it seems not improper to notice here another remarkable 

 member of this family which was dredged by the " Albatross " on the ^est coast 

 of Hawaii, in about 200 fathoms, in 1903. 



BASIL,10L.A Dall, n. gen. 



A Hemithyris in which the deltidial plates join in the middle line before the 

 foramen of the ventral valve, then are reflected backward and upward witliiu the 

 cavity of the beak until they meet each other, thus forming in the cavity of 

 the beak a wide tube with free anterior edges (except in the senile stage of the 

 shell) and soldered to tlie inside of the umboual cavity laterally and near the fora- 

 men. The posterior free edges of the deltidia, which form part of the margin, an- 

 teriorly, of the foramen are produced aud funicular ; the dorsal anterior margin 

 of the internal tube is produced beyond the margin of the deltidium as seen ex- 

 ternally, in two small pointed folds of a W shape, which perhaps serve as a myo- 

 phore. There is no septum in either valve ; in youth and middle age the hinge teeth 

 are supported by high props in the ventral valve, the cavity behind which, on each 

 side, becomes in the senile stage more or less filled with a shelly deposit ; the 

 hinge plate and crura as in Hemithyris, but the hinge teeth sharply cross-striated. 

 The valves are sinuated in front, aud the surface of the shell is smooth. 



^ype, Hemithyris beecheri Dall, 1895. 



This remarkable form will be described and illustrated in my forthcoming report 

 on the Mollusks of the Hawaiian voyage of the " Albatross." 



Terebratulacea. 



Terehratididae. 



TEREBRATULIIVA D'Orbignt. 



Terebratulina n. sp. 



This species, under the name of T. crossei Davidson, originally described from 

 Japan, is reported by Fischer and Oehlert as obt.aiucd in the Magellanic region 

 in New Year Sound and near Punta Arenas, iu 9 to 184 fathoms, temperature 

 7° to 8*.2 C. (44°.6-46°.7 F.). I am informed by Dr. Blochmann of Tubingen, 

 who is engaged iu a critical study of the species of this genus, that the Magellanic 

 species is distinct from that of Japan, as might be expected. It resembles some- 

 what T. kiiensis Dall and Pilsbry, but is not yet named. 



