390 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



but one are within the Archipelago, and range in depth from 78 to 

 569 fathoms (143 to 1,040 metere); bottom temperatures range from 

 41.2° to 59.0° F. (5.1 to 15.3° C). These stations embrace the 

 following general localities: Off Romblon; western Bohol; Panay; 

 Verde Island Passage; off southern Luzon; eastern Luzon; off Min- 

 danao; between Siquijor and Bohol; Negros and Siquijor; and Sulu 

 Sea. 



A few specimens were found at D5590, Sibuko Bay, Borneo, in 310 

 fathoms (567 meters), bottom temperature 44.3° F. (6.8° C). 



Heron-Allen and Earland ^* note that in their material from the 

 Kerimba Archipelago "two or three distinct types occur" and give 

 notes on the various forms. It probably indicates that if this and 

 other widely distributed species are closely studied various forms 

 may be distinguished. 



Cornuspira involvens — Material examined. 



CORNUSPIRA INVOLVENS Reuss, var. SUBSTRIATULA, new variety. 



Plate 77, fig. 5. 



Description . — Test similar to the typical in general characters, 

 but the exterior, instead of smooth, is marked by numerous fine 

 longitudinal striations. 



Distribution. — Type specimen (U.S.N.M. No. 10752) from Alha- 

 tross station D5236, in 494 fathoms (903 meters). Pacific Ocean, 

 east coast of Mindanao, bottom temperature 41.2° F. (5.1° C). 

 Specimens were common at this station, while very few of the typical 

 form occurred. The variety was also noted from the following sta- 

 tions: D5282, in 248 fathoms (454 meters), China Sea, off southern 

 Luzon, bottom temperature 47.4° F. (8.5° C); D5567 in 268 fathoms 

 (491 meters), bottom temperature 52.0° F. (11.1° C); and D5571, 



»< Trans. Zool. Soc., vol. 20, 1915, p. 593. 



