NATICIDAE 187 



Subgenus Glossaulax Pilsbry 1929 

 Polinices reclusianus Deshayes Recluz's Moon-shell 



Plate 2oi 



Crescent City, California, to Lower California. 



1V2 to 1V2 inches in length, very heavy for its size. Spire moderately to 

 quite vi^ell elevated. Exterior semi-glossy, grayish with rusty-brown or green- 

 ish stains. Characterized by a large, tongue-like callus, brownish or white in 

 color, which may or may not cover the entire umbilicus. There is a strong 

 white, reinforcing callus at the top of the inside of the aperture. Operculum 

 translucent, reddish brown. The shape of shell and degree of development of 

 the umbilical callus is variable, and has received various names — alms Arnold 

 and imperforatus Dall. A common shallow water species also found as deep 

 as 25 fathoms. 



Polmices draconis Dall Drake's Moon-shell 



Figure 43a 



Alaska to Lower California. 



2 to 2 % inches in length, very similar to Lunatia leivisi, but with a wider 

 more elongate umbilicus, and with a very small, almost obsolete callus above 

 the umbilicus. Uncommon in waters from i o to 2 5 fathoms. 



Genus Sigatica Meyer and Aldrich 1886 

 Sigatica carolinensis Dall Carolina Moon-shell 



Plate 22I 



North Carolina to southeast Florida and the West Indies. 



^/4 inch in length, white, glossy, ovate, fairly thin-shelled; umbilicus 

 deep, round, without a callus. Characterized by 2 smooth nuclear whorls, 

 followed by 3 whorls which are finely grooved by about 20 spiral lines. 

 Suture well-channeled. Operculum paucispiral, corneous, its early whorls 

 thickened and raised somewhat. S. holograpta McGinty is so similar that it 

 may well be this species. Dredged 20 to 95 fathoms; not uncommon. 



5. se?nisulcata Gray from West Florida and the West Indies reaches 34 

 inch in size, has 5 to 6 spiral Hnes cut into the top third of the whorl, and a 

 few within the umbilicus. Often confused with Polinices lacteus. Rare. 



Genus Amauropsis Morch 1857 

 Amaiiropsis islandica Gmelin Iceland Moon-shell 



Plate 2 2r 



Arctic Seas to off Virginia. 



I to 1^/2 inches in length, % as wide, rather thin, but strong. Suture 



