388 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



The only station at which specimens were at all common is D5236 

 in 494 fathoms (903 meters), Pacific Ocean, east coast of Mindanao. 



Taken as a whole the specimens are very typical in size and general 

 characters, at least for warm, comparatively shallow water. None 

 of the specimens has a greater diameter than 3 mm. The species 

 reaches its greatest development both in size and the amount of its 

 spread in colder waters. The finest specimens I have ever seen were 

 from the Arctic, while those of the colder parts of the North Atlantic 

 reach large dimensions. 



In the general faunal area it is knoAvn from the Hawaiian Islands 

 (Bagg, Cushman) in the east to the Kerimba Archipelago, off south 

 eastern Africa (Heron-Allen and Earland), and Mauritius (Egger) 

 from southern Japan (Cushman) in the north to Raine Island, and 

 Kandavu (Brady). In nearly all cases it is noted that the specimens 

 from this region are of comparatively small size and rather close 

 coiled. I noted this in the Philippine material, and it is confirmed 

 by the following notes: ^^ 



Although tolerably abundant and widely diffused, the specimens are feeble, none 

 of them exhibiting the rapid increase in size of the outer convolution which is char- 

 acteristic of the species. 



Heron-Allen and Earland: ^^ 



All the specimens are small and of the true Philippi type; none of the broad diver- 

 gent type * * * were found at Kerimba. 



It may be that Costa's name ammonitiformis should be applied to 

 this smaller and more closely coiled form, and foliacea Philippi ap- 

 plied to the larger, more flaring form from colder and deeper water 

 elsewhere. 



Cornuspira foliacea — Material examined. 



CORNUSPIRA FOLIACEA (Philippi), Tar. EXPANSA Chapman. 



Plate 77, fig. 2. 



Cornuspira carinata Costa, var. expansa Chapman, Biol. Res. Endeavour, vol. 3, 

 pt. 1, 1915, p. 12, pi. 1, fig. 3. 



w Mlllett, Joum. Roy. Micr. Soc, 1898, p. 612. 

 8» Trans. Zool. Soc, vol. 20, 1916. p. 592. 



