132 THE NAUTILUS. 



stronger toward the umbilicus, where the interspaces become feebly 

 nodulous, the last one on the brink of the umbilicus more strongly 

 so ; umbilicus moderately large, funicular, its walls white, smooth, 

 and slightly excavated just within the basal margin ; pillar white, 

 thin, arcuate, ending in a blunt projection separated by a small notch 

 from the basal margin of the aperture, which, with the outer lip, is 

 thin and sharp ; throat pearly, without lirations or callus on the body. 

 Alt. of shell 19.0, max. diam. 18.0 ; diam. of umbilicus 2.5, min. 

 diam. of base 16.0 mm. 



The periphery is subangulate, becoming rounded in the adult. The 

 operculum is thin, horny, multi-spiral, with about 14 whorls. The 

 animal is of a reddish color somewhat like the shell, the sides of the 

 foot granular, the muzzle concentrically wrinkled, the tentacles long 

 and slender, with no epicephalic veil between them ; the eyes large 

 and black, on short but distinct peduncles, behind and above the 

 tentacles ; epipodial lobes with papillose edges and two or three more 

 elongate processes on each side, but none project from the opercular 

 lobe ; the foot is short and rather blunt behind. As contracted from 

 immersion in alcohol, the tentacles and epipodial processes seem 

 smooth, and show no such ciliation as is figured by Adams in Callios- 

 toma, while the absence of the " veil " is noteworthy. 



Altogether, though not very large, this is one of the most attractive 

 East American species, both in form and coloration. Only one 

 specimen has yet been obtained, No. 187233, U. S. Nat. Mus. register. 



NOTE ON TRIVIA ACUTIDENTATA GASK. A few years ago, 

 among a few shells obtained by me in San Francisco on board a 

 schooner direct from the Galapagos Islands, I found one beach-worn 

 Trivia which puzzled me, as it differed widely from any species then 

 known to me. Upon a recent careful reading of the original descrip- 

 tion of Trivia acutidentata Gask.. I find that this specimen corre- 

 sponds exactly to Gaskoin's description. 



This species, thus far unfigured, was described (Proc. Z. S., 1835, 

 p. 201) from a single worn specimen collected by Cuming in the Bay 

 of Guayaquil, and which, after description, was broken into unrecog- 

 nizable fragments. As the locality of my specimen is also substan- 

 tially the same, it would seem that this long-lost species has at this 

 late day been again found FRED L. BUTTON. 



FEEDING HABITS AND GROWTH OF VENUS MERCENARIA. By 

 Jas. L. Kellogg (N. Y. State Museum, Bull. 71). A very interest- 

 ing and instructive paper illustrated by four plates C. W. J. 



