278 PLANAXIS. 



P. NIGRA, Quoy. PL 52, figs. 37, 39, 41-47. 



Epidermis chocolate or olivaceous chocolate, smooth, a few close, 

 narrow, engraved lines at the base, and occasionally vestiges of 

 others on the spire and at the suture, interior polished chocolate. 



Length, 13-15 mill. 



New Ireland, Viti and Sandwich Is., South Africa. 



P. Hanleyi, Smith (fig. 39), P. similis, Smith (fig. 44), and P. 

 acutus, Krauss (fig. 42), are synonyms. P. Albersi, Dunker (fig. 

 46), from Guinea, West Africa, may be identical, or it may be the 

 young of P. nucleus ; and probably P. atropurpureus, Recluz (fig. 

 45), from the "South Seas," may be added. 



Var. NIGRITELLA, Forbes. PL 52, figs. 47, 43. 



Dark chestnut or chocolate color, polished, under a thin epider- 

 mis, closely, narrowly spirally engraved, usually obsolete on the 

 middle of the body whorl. Length, 12-15 mill. 



It is somewhat difficult to distinguish this variety from the type, 

 except by its distribution; it is usually lighter colored and occurs 

 at Mazatlan, West Coast of Mexico. 



P. acutus and P. obsoletus, Menke, are synonyms, and very prob- 

 ably P. castaneus, Smith (fig. 43), is to be added ; it is described 

 without locality. 



P. LINEATUS, Da Costa. PL 53, figs. 49-57, 59, 63-66 ; PL 52, figs. 



38-48. 



Small, nearly smooth, polished beneath the epidermis, light yel- 

 lowish varying to orange brown and chestnut color, spirally lineated 

 with chestnut and chocolate. Length, 6-12 mill. 



West Indies, Madeira, Paumotus, Tahiti, Solomon's Is., etc. 



The lineations are usually regular throughout, but sometimes few 

 and distant, at others the upper or lower part of the body whorl is 

 devoid of them. First described in error as British. 



The synonyms are Bucc. zebra, Megerle, B. striyosum, GmeL, 

 P. pedicularis, Lam., Bucc. pygmwum, Brug., P. succinctus, A. Ad. 

 (fig. 65), P. eboreus, Smith (fig. 64.) There can be no doubt of the 

 specific identity of the Polynesian representatives which have re- 

 ceived the names of P. lineolatus, Gould (fig. 57), and its var. pro- 

 ductus, Nevill, P.fasciatus, Pease (fig. 66), P. atra, Pease (fig. 38), 

 named from specimens so dark in color that the banding is scarcely 

 visible except by transmitted light, P. eingulatus, A. Ad. (fig. 48), 

 P. variabilis, E. A. Smith (figs. 50, 51), P. ineptus, Gould (fig. 52), 



