H. A. Pilsbry — Littoral Mollusks from Patagonia. 127 



The original description and figures were from a young 

 shell. The species has not hitherto been recognized, probably 

 owing to this circumstance. Mature specimens collected by 

 Mr. Hatcher are here described and illustrated. The figures 

 referred to decolor Phil, in the Voyage au Pol Sud. (Zool., pi. 

 25, f. 6-8), look like adults of textiliosus. 



T. textiliosus has been reckoned a synonym of T. Gerver- 

 sianus by Tryon (Man. Conch. II and III), but this is only 

 another example of the "lumping" practised by him in deal- 

 ing with Trophon. 



It differs conspicuously from most other Cape Horn Tro- 

 phons in its less rude sculpture and symmetrical contours. 

 T. decolor Phil, has a much shorter anterior canal, purple 

 interior and fewer spirals. In T. cancellinus Ph. the lip is 

 thickened and dentate within. T. crispus Gld. differs in 

 sculpture ; and T. liratus Couth., which is apparently the 

 most nearly allied species, has the anterior canal longer, and 

 there are fewer spiral grooves. Specimens are in the collection 

 of the Academy of JNatural Sciences of Philadelphia from 

 " Santa Cruz River, Patagonia, Wm. Bell." 



Btjccinid^e. 

 JEuthria plumbea Phil. 



Enthria sp. undet. Like plumbea, but finely spirally 

 striated throughout. All of the specimens are beach-worn and 

 not suitable for description. 



Bullia globulosa Kiener. 



Volutid^e. 

 Scaphella lerussaci Don. 

 Scaphella ancilla Sol. 



Calyp^etkid^e. 

 Trochita corrugata Reeve. Varies toward forms in which 

 the radial ribs almost disappear. 



Tkochid^e. 

 Photinula coerulescens King. 

 Photimda tceniata Wood. 



Photinula pruinosa Mab. and Roch. Quite distinct from 

 the longer-known species in its Gibbula-like contour and wide, 

 flattened, lusterless columella. 



Patellid^e. 

 Nacella arnea magellanica Gmel. 

 Nacella cenea deaurata Gmel. 



MOPALIID^E. 



Plaxiphora setigera King. 



