86 TI1K NAUTILUS. 



Shells from recent flood 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. 



Vallouia cyclophorella Anc. Bifidaria pilsbryana Sterki. 



Cochlicopa lubrica (Mull.). Vertigo ovata Say. 



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



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



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



Bifidaria armifera (Say). Limmea 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 «H whorls, to fully 4 mm. with 61 whorls. 



CONUS CONSORS SOWB. 



BY CHARLES I.E 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 " Conns consors 

 Sowb." 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 : 



Conus 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. 



