JAPANESE MOLLUSKS, PLEUROTOMID^E. 17 



Drillia graoilenta Reeve. Smith, P. Z. S., 1879, p. 195, pi. 19, f. 24 ; Reeve, C. Icon., 

 f. 114 (plus P. contracta Rve., f. 116, and P. fusoides Rve. f. 349). 



E. coast of Kii, S. of Nippon (St. John) ; Karaakura and Tokyo 

 Harbor (Stearns). 

 Drillia humilis Smith. P. Z. S., 1879, p. 193, pi. 19, f. 20. 



Ojika Bay, Goto Is., 10 fms. (St. John). 

 Drillia principalis n. sp. PI. 2, f. 17. 



Shell resembling D.jeffreysii Smith, but decidedly more attenua- 

 ted. Whorls about 13, angular convex, concave above, buff, finely 

 mottled all over with reddish-brown, purplish on the spire, especially 

 between the folds. Sculptured with oblique longitudinal folds (11 

 on penult, whorl) which stop abruptly at the shoulder and grad- 

 ually decrease below ; spirals rather spaced, coarse and unequal, 

 alternating in size, absent on the concave upper surface of the 

 whorls; the surface between lirse and over the concave analfasciole 

 finely spirally striate. Aperture sub-rhombic, narrowed below, 

 slightly over one-third the shell's length ; canal a little recurved. 

 Anal sinus very deep, straight ; outer lip arched forward, with a 

 distinct sub-basal sinus. Columella moderately calloused and nearly 

 straight below, bearing a callous tubercle above. 



Alt. 53, diam. 18 mm. 



Alt. 36, diam. 11 mm. 



D- jeffreysii, while allied to this, is far broader if specimens of the 

 same size be compared. D. latisinuata Smith has a wider, squarer 

 anal sinus, with flaring posterior lobe of the outer lip. The shape 

 of the sinus itself is different in D. lanceolata (Rve.) Martens. In 

 some specimens the spiral lirse are much wider, flattened, and the 

 folds more numerous. Inland Sea (Stearns). 

 Drillia inconstans Smith. Ann. Mag. N. H., 1875, (4), xv, p. 417. 



Ooshima Harbor, 8 fms. ; Tsushima Strait, 9 fms. ; Matoza Har- 

 bor, 6 fms. (St. John). 

 Drillia intermaculata Smith. P. Z. S., 1879, pi. 19, f. 19. 



South of Corea. 

 Drillia interrupta Lam. C. Icon., f. 51. 



Deshima (Dkr.). 

 Drillia japonica Lischke. Smith, P. Z. S., 1879, p. 191, pi. 19, f. 15. 



Boshiu, Kamakura, Tokyo Harbor, coast of Prov. Kii (Stearns) ; 

 Nagasaki (Lischke) ; north of Kiushiu, 33 56' N. lat., 130 27' E. 

 long. (Smith). 2 



