102 



THE NAUTILUS. 



resembling a loosely woven fabric. The aperture is somewhat 

 oblique, contracted, obtuse posteriorly, tourmaline-pink around 

 the lips, paler, nearly white, in the throat. The outer lip is 

 thickened within except posteriorly where it is excavated; the 

 thickening bearing about seven teeth, the upper ones larger. 

 The columella has two or three blunt and low but deeply enter- 

 ing folds. The inner lip has a thin free edge. The siphonal 

 fasciole is deeply striate spirally. 



Length 21, diam. 11 mm. (type). 



Length 23.8, diam. 12.3 mm. (Honolulu Harbor). 



The specimens from the Honolulu Harbor dump, though 

 quite perfect in appearance, are evidently bleached. The color 

 is a handsome maize-yellow, uniform, or sometimes a shade 

 darker on the high points of the sculpture. The aperture is 

 pure white (fig. 6.) 



This species, though differing in color and sculpture, is related 

 to P. incarnata Dh., " Ricinula " pulchra Reeve, and P. carolinse 

 Kiener — species somewhat like Cantharus or Drupa. A section 

 shows that the two columellar plaits are strong within, ascend- 

 ing the pillar. 



Drupa morus (Lam.). PI. 9, fig. 11. 



Ricinula morus Lam., An. s. Vert, vii, 1822, p. 232. Encycl. 

 Meth., pi. 395, fig. 6 a, b. 



Haena, Kauai, Honolulu Harbor; Mokumanu, off Mokapuu 

 Point, and Kainalu, Oahu. 



The specimens from the harbor are rather small, length up to 

 about 16-18 mm., but otherwise they appear typical. A speci- 

 men from Kainalu is 22 mm. long. Lamarck referred to ex- 

 cellent figures in the Encycl. Methodique, but also to Lister, 

 954: 4, 5, and Martini III, 101: 970; both are dubious and in- 

 conclusive illustrations, which served as the sole basis of Drupa 

 uva Bolten, Mus. Bolt., p. 56, no. 703. They look more like 

 some forms of D. tuberculata than like morns; and we prefer to 

 use the positively identified name. 



The common Hawaiian species of the genus is Drupa tuber- 

 culata (Blainv. ), which the authors have from various places in 

 Kauai, Oahu, Molokai, and on Molokini. It occurs at low 

 tide, and may be picked up on any reef or rocky shore (pi. 9, 

 fig. 10.) 



