6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82, art. 19 



Rertiarks. — This species is related to P. gouldii (Reeve), which 

 under the microscope shows a similar pattern of crisscross scratches ; 

 but in that species the shape is slenderer and the aperture smaller, 

 less than half of the total length, while in our species it is decidedly 

 more than half. It is a thinner shell than P. torridus (Gould) and 

 quite different in the microscopic sculpture. 



A note by the collector states that this snail is used for food. 



There is a young shell (U.S.N.M. No. 151003), taken by the same 

 collector at the same place, that measures: Length, 36.7 mm; diame- 

 ter, 26 mm; 6 whorls; at this stage the periphery is rather strongly 

 angular. 



PSEUDOTROCHUS AURIPIGMENTUM MUSCARUM, new subspecies 



Plate 2, Figures 1, 2 



Type.—V.S.'^M. No. 336169, collected by Aschemeier, Collins- 

 Garner French Congo expedition, at Agouma, Rem Nkami, Gaboon 

 Colony, French Congo. 



Descri/ptio?}. — The last whorl is cinnamon-buff, paler toward the 

 suture and in a band below the angular periphery, an ill-defined 

 darker band above it; sprinkled with chestnut dots; on the penulti- 

 mate whorl there are some oblique dark smears and scattered opaque 

 white spots in its upper half. Next earlier two whorls with short, 

 dark flames in the upper half; apical whorls nearly white. Colu- 

 mella and parietal callus chestnut-brown. 



Length, 56 mm; diameter, 29.3 mm; 7 whorls. 



Remarks. — The locality of this race is farther south than that of 

 P. auripigmeiitum or of any of its other races. 



!I S GOVFRNMFNT PRINTING OFF 



