236 SURCULA. 



Linnaeus ; the usual shouldered form is also the P. scalarina, 

 Lam. 



P. BECURVIROSTRIS, Marrat (unfigured). W. Africa. 



No dimensions are given. ? = P. aculeiformis. 



Genus SURCULA, H. and A. Adams, 1853. 



With long canal. 

 S. MACULOSA, Sowerby. PL 5, fig. 57. 



Smooth, or with light revolving striae, the shoulder of the 

 whorls angulated and defined by a row of tubercles ; flesh- 

 colored, light brown, or light purplish, with chestnut macula- 

 tions. L. 42, cliam. 13 mill. 



West Columbia to Gulf of California. 



S. BRUNNEOMACULATA, Sowb. PL 10, fig. 71. 



Shell stout, with a more turreted spire and more angulate 

 periphery and stronger nodules than ' S. maculosa, the whorls 

 also more distinctly spirally striate ; color j^ellowish brown with 

 chestnut maculations and interrupted bands. 



? California (Frick). 



Notwithstanding the differences above pointed out, the species 

 is evidently so closety allied to S. maculosa, that I have hesitated 

 to keep it separate. I scarcely think that Weinkauffs figure 

 represents the species. 



S. AUSTRALIS, Roissy. PL 5, fig. 58 ; PL 2, fig. 9. 



Shell yellowish white, encircled. by corded orange-brown ribs, 

 with several intermediate striae ; outer lip broadly rounded 

 above into the rather shallow sinus. L. 100, diam. 28 mill. 



China Sea, Philippines. 



S. turris, Yal. (fig. 9), is a synonym. 



S. ARCUATA, Reeve. PL 5, fig. 61. 



Shell arcuately fusiform, thin, inflated, rather transparent; 

 whorls lined and sharply keeled round the middle, keel painted 

 with regular brown spots; lip rounded, separated from the last 

 whorl by a broad sinus; canal slender, curved, equaling the 

 length of the spire. L. 43, diam. 13 mill. 



Coast of Veragua, Central America (Hinds). 



