PLACOSTYLUS DIPLOMOKPHA. 117 



callus rather thin, yellowish. Alt. 18.2, diam. 12.8, longest axis of 

 aperture 11.6 mill. New Hebrides: Aura Island. 



Diplomorpha brazieri HARTMAN, Proc. Acad. Nat. Sci. Phila., 

 1889, p. 93, pi. 5, f. 6 (June, 1889). 



Thid very distinct species differs from others in the almost unex- 

 panded outer lip. It is probably nearest P. layardi, which is very 

 different in the aperture. Described and figured from the type. 



P. PEASEI (Cox). PI. 72, figs. 7, 8, 9. 



" Shell deeply and openly umbilicaied, ovately conical, very 

 broadly inflated toward the base ; spire short, broadly conical ; whorls 

 5, convex, last rapidly increasing in size and inflated ; suture im- 

 pressed ; aperture squarely ovate, obliquely produced, lip and colu- 

 mella white, thickened, and broadly reflected, interior of aperture 

 orange-red ; covered with a striated dark chestnut epidermis. Length 

 0.94, breadth 0.70 of an inch." (Cox.) 



Solomon Is. (Rainbird). 



Partula peasei Cox, Proc. Zool. Soc. Lond., 1871, p. 644, pi. 52, 

 f. 2. PFR., Monogr. viii, p. 208. 



Named in honor of W. Harper Pease. I doubt the locality as- 

 signed to this species. It is evidently very near P. delatouri Hartm., 

 from which it differs in the more inflated last whorl and far more 

 ample umbilicus. The single specimen before me (pi. 72, figs. 7, 8) 

 is denuded of cuticle, the last two whorls being flesh-tinted, those 

 above orange-tinted. AVhorls 4^, convex, the last much inflated, 

 ascending in front, the later half obliquely produced below ; a distinct 

 groove is seen behind the lip, running backward, indicated internally 

 by a slight ridge and a distinct prominence within the middle of the 

 outer lip. The aperture is vertical, and the peristome broadly flaring 

 throughout, almost reflexed. There is no prominence on the colu- 

 mella, which is oblique and straight in the middle, and the moderate 

 parietal callus bears no tooth. Alt. 23, diam. 19, longest axis of 

 aperture 16^ mill. 



P. DELATOURI (Hartman). PI. 72, figs. 10, 11, 12. 



Shell umbilicate, obesely ovate, moderately solid, slightly shining. 

 Gray-whitish, deepening to fleshy-purple behind the lip, under a thin 

 yellowish cuticle with narrow darker or reddish-brown streaks. Sur- 

 face smoothish, with slight growth-wrinkles and some spiral stria- 

 tion, usually rather faint. Whorls 4^-4^, convex, the last very 



