MUSEUM OF COMrARATIVE ZOOLOGY. 105 



Daphnella retifera n. s. 



Shell small, thin, oval, short-spired, yellowish with pale cloudy markings of 

 brownish ; nucleus of the Sinusiyera type to hegin with, but not strongly sculp- 

 tured, and the liirval sliell after 2.^ turns of the usual sort becomes smooth and 

 continues for 2^ whorls more, quite smooth and rounded, before the normal 

 sculpture begins ; the latter continues in the largest specimen for 2}^ turns 

 more. The fasciole is hardly discernible except by following the incremental 

 lines ; it is sculptured like the rest, and not excavated ; the suture is distinct; 

 the sculpture is composed of numerous tine sharp spiral threads with sligiitly 

 wider interspaces, crossed by somewhat less prominent transverse threads, 

 making a very regular reticulation over the whole surface; at most of the 

 intersections a small point elevates itself, giving a peculiarly rasp-like appear- 

 ance to the dull unpolished surface of the shell; notch shallow, situated at the 

 suture; aperture pointed behind, outer lip arched well forward, hardly con- 

 tracted for the broad short canal ; edge thin, interior not lirate ; columella 

 not callous, nearly straight, simple, very slightly recurved at the end of the 

 canal; whorls moderately rounded. Lon. of shell, 6.5; of last whorl, 5.0 ; lat. 

 of shell, 3.0 mm. 



Obtained by the U. S. Fish Commission at Stations 2595 and 2596, twenty 

 miles E. S. E. from Cape Hatteras, in 49-63 fms., sand, bottom temperature 

 75°.0. 



This is a very delicate and elegant little shell, remarkable for the number 

 and size of its larval whorls and the prickly reticulation. In color, though 

 less decided, it recalls D. lymnceiformis Kiener. 



Daphnella morra Dall. 



Plate XII. Figr. 1. 



Pleurotoma [Drillia) morra Dall, Bull. M. C. Z., IX. p. 69, 1881. 



Habitat. Sigsbee, off Havana, 450 fms. U. S. Fish Commission Stations 

 2595, 2596, 2608, and 2614, in 22 to 168 fms., sand, off the coast of North 

 Carolina, temperature 75°.0 F. 



The examination of more material has shown that this should be placed in 

 Daphnella. When fresh it is of a glistening translucent rich brown ; the spire 

 is often quite lax, in other cases more compactly coiled, so that at first the 

 specimens would seem unrelated, especially if one was fresh and the other dead 

 and opaque. This little shell has some general resemblance to Lachesis minima^ 

 but in details of nucleus and aperture the difference is conclusive. 



? Daphnella elata Dall. 



Shell small, Mangilia-VikQj elongated, narrow, translucent white with streaks 

 and lines of dark brown or yellow ; nucleus with the first whorl minute, tilted, 



