316 PROCEEDINGS OF THE ACADEMY OF [NoV., 



Off Honolulu, D. B. Langford. 



The shell is less elongate than M. gracilis Reeve, and is more 

 closely related to M. granahna than to the M. filosa complex. 



Valuta filans L. (Mantissa p. 548, 1771) is not positively iden- 

 tified, though the opinion of Hanley that it is identified with M. 

 filosa Lam. (not Born), (Kiener's pi. 5, figs. 12), seems probable. 



M. filosa Born ( + M. nexilis Martyn) and M. hernardiana Phil, 

 appear to be distinct and valid species. M. circula Kiener {"cir- 

 culata" of Reeve and Tryon) is also quite distinct. None of these 

 has been taken in Hawaiian waters so far as I know, 



Mitra emersoni n. sp. PI. XII, fig. 19. 



A species closely related to M. crenijer Lam.;^ smaller; the verti- 

 cal impressed lines about twice as far apart. 



The shell is buff with a broad, irregu'ar peripheral band of chest- 

 nut, its upper half interrupted into a series of large spots; also an 

 indistinct, brown band composed of spots and dashes at the base. 



Sculpture of alternately smaller and larger spirals and well-spaced, 

 vertical, impressed lines. Four plaits. Embryonic shell pinkish. 



Length 29.3, diameter 9.3, aperture 16.4 mm. Seven and one- 

 half post-embryonic whorls. 



Off Honolulu. D. B. Langford. 



Named in honor of Mr. Joseph Emerson of Honolulu. 



Mitra pallida Pse. (Proc Zool Soc. London, 1860, p. 146) has not 

 been described with sufficient detail for recognition. 



Mitra waikikiensis n. sp. PI. XII, flg. 17. 



The shell is fusiform, pale brown with ill-defined darker peripheral 

 and basal bands and white tubercles. Sculpture of spiral cords 

 (eleven on the last whorl behind the lip) and lower longitudinal 

 ribs, producing tubercles where they cross the cords. Aperture 

 white. Columella with three plaits, the uppei" large, the lower 

 quite small. 



Length 12.5, diameter 4.8, length of aperture 6.7 mm. 



Length 11.6, diameter 4.5, length of aperture 6.3 mm. 



Off Waikiki, Oahu, in 35-50 fms. D. B. Langford. 



VexiUum thaanumi n. sp. PI. XII, flg. .31. 



The shell is fusiform, rather slender, white, with a cinnamon 

 band below the periphery. At the periphery there are narrow vin- 



^Which perhaps = M. clathrus (Gmelin), but the figure of that is very unsatis- 

 factory. 



