86 



THE NAUTILUS. 



Shells from recent food debris of Arroyo. Pecos, Las Vegas, N. M. 



A series of shells lately collected by one of us gives the following 

 species. The source of the shells is unknown, until the Arroya is 

 followed up and their station found. In wanting Ashmunella, and in 

 the abundance of Bifidaria, the assemblage is unlike that of the ad- 

 jacent mountains. 



Vallonia cyclophorella Anc. Bifidaria pilsbryana Sterki. 



Cochlicopa lubrica (Miill.). Vertigo ovata Say. 



Pupoides marginatus (Say). Zonitoides arboreus (Say). 



Pupoides hordaceus (Gabb). Euconulus fulvus (Drap.). 



Pupa blandi (Morse). Helicodiscus lineatus (Say). 



Bifidaria armifera (Say). Limnrea humilis Say. 



Bifidaria holzingeri (Sterki). Planorbis parvus Say. 



Bifidaria hordeacella (Pils.). Physa sp., broken. 



Bifidaria procera ^Gld.). 



The specimens of Bifidaria armifera vary in length from a trifle 

 over 3 mm. with 5^ whorls, to fully 4 mm. with 6^ whorls. 



CONUS CONSORS SOWS. 



BY CHARLES LE ROY WHEELER. 



My attention has been attracted to the above species while identi- 

 fying a mixed lot of cones from Zanzibar, embracing about four thou- 

 sand specimens, from the fact that many collectors, and some mus- 

 eums, have in their collections specimens labeled '' Conus consors 

 So\vb." that are far from what Sowerby evidently figured under that 

 name. But Tryon's description appears to authorize the errors in 

 identification. I, therefore, offer the following description : 



Conns consors Sowb., Thes. Conch., f. 492. 



Spire concavely elevated, with shallow channel and revolving 

 striae, delicately tessellated with orange, apex acute and of pinkish 

 tint ; body-whorl slightly depressed in centre and inflated above, 

 grooved toward the base ; ivory white, with an orange band below 

 the center, and one above sometimes reaching to the shoulder, the 

 upper part of this band more or less broken ; aperture white ; epider- 

 mis velvety, light brown, tough and very adherent. 



