56 BULLETIN OF THE 



This extremely common shell, under the influence of the sun and weather, 

 bleaches white or nearly so. Two specimens of this kind were described by 

 Turton, many years ago, under the above mentioned name, as British. They 

 were of course exotic, and West Indian. But they have been referred to B. 

 striata of the Mediterranean and West Indian faunse. Turton's types in the 

 Jeffreys collection enable me to correct this error. 



Bulla abyssicola Dall. 



Plate XVII. Fig. 11. 



Bulla abyssicola Dall, Bulletin M. C. Z., IX. p. 97, 1881. 



Bulla pinguicula Jeffreys MS., Ann. Mag. Nat. Hist., Oct. 1880, p. 318, No. 140 (name 

 only). Watson, Chall. Rep., p. 638, 1886. 



Habitat. Yucatan Strait, 640 fms. Station 43, 339 fms. (young). Station 

 136, off Frederikstadt, Santa Cruz, in 508 fms., ooze, bottom temperature 

 42°. 5 F. 



The nearest relative of this species appears to be the Bulla utriculus of Europe, 

 which is longer, less cylindrical, and has a deep pit at the apex. 



I have been enabled from an inspection of his type to determine that the 

 manuscript name of Dr. Jeffreys applies to this species. It was obtained by 

 the Travailleur in the Bay of Biscay, and also by the Challenger in 450 

 fms., mud, off Fayal, Azores, at (Challenger) Station No. 75. As no descrip- 

 tion has ever been attached to Dr. Jeffreys's name, it necessarily falls into 

 synonymy. 



It is possible that this species also is more nearly related to the preceding 

 family, but the soft parts are as yet unknown. 



Bulla Krebsii n. s. 



Shell nearly the form of B. occidentalis A. Adams,* but more cylindrical and 

 of an ivory porcellanous white. The posterior angle of the aperture is more 

 sharp and the aperture near it narrower, while on the columella there is a faint 

 revolving ridge which suggests a plait, though too obscure to be so named. 

 The surface is brilliantly polished, with perceptible incremental lines. Callus 

 on the body, thin with a very minute chink behind that on the pillar. Apex 

 deeply sunken, pervious, scalate, showing nearly four volutions, the margin of 

 the vortex rounded, with faint indications of a carinal line. Max. Ion. 8.0; 

 max. lat. 5.0 mm. 



Habitat. Station 163, near Guadelupe, in 769 fms., sand, bottom temper- 

 ature 39°.75 F. 



I cannot make this fit in with any previously known species. It may prove 

 not to be a typical Bulla. 



* Thes. Conch., Bulla, pi. cxxiii. fig. 73. 



