186 
PACIFIC SCIENCE, Vol. XXI, April 1967 
showing two views of the lateral and the rachidian. 
Fig. 11. Radula teeth of Benthovoluta hilgen- 
dorfi (von Martens, 1897). Copied from Habe, 1952. 
whorl considerably longer than spire, with a 
long, straight, open anterior canal; outer lip 
broken in all specimens, but apparently simple, 
thin; columella with 2 low spiral folds, the 
upper fold larger. 
locality: Off Cagayan Islands, northern 
Sulu Sea, Philippines, in 508 fathoms; U.S.B.F. 
"Albatross I” Sta. 5423, 9° 38' 30" N, 121° 
11' E, gray mud and coral sand bottom; March 
31, 1909. Six specimens collected. 
measurements: 
SPECIMEN LENGTH WIDTH 
Holotype (usnm 637252) 54.75 mm 13.4 mm 
Figured Paratype 
(usnm 238408) 57.75 mm 12.9 mm 
remarks: This species differs from both B. 
hilgendorf von Martens and B. plicifera Yoko- 
yama in being more slender, with a thinner 
shell, and with the axial ribs more angulated 
at the periphery. 
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