238 SURCU^A. 



by coarse riblets and stride; interior of outer lip generally 

 showing revolving striae ; yellowish brown, chestnut or chocolate, 

 under a light olivaceous or brownish epidermis, the projecting 

 portions of lighter color. Jj. 62, diam. 26 mill. 



Panama to Gulf of California. 



P. funiculata, Val. (fig. TO), and P. duplicata, Sowb. (fig. 77), 

 are synonyms. The species is a very common one in the Gulf 

 of California and at Mazatlan. Fig. 69, which represents the 

 typical olivacea, at first sight would be supposed to be distinct 

 from funiculata (fig. 70), and to approach the next species. 

 The shoulder is very narrow, so that the angle is not prominent. 

 I figure an intermediate form from Weinkauff (PL 34, fig. 3), 

 which he calls S. olivacea. 



S. TUBERCULIFERA, Brod. and Sowb. PL 5, fig. 68 ; PL 10, fig. 60. 



Whorls well rounded with strong rounded ribs, nodules forming 

 a single row on each whorl, with strong revolving striye ; yellowish 

 brown, darker banded above arid below the nodules, with some 

 additional brown revolving lines below the lowest band. 



L. 63, diam. 22 mill. 



Gulf of California. 



Described from a specimen not fully grown (PL 5, fig. 68). 

 Through the kindness of Mr. R,. E. C. Stearns I am enabled to 

 give a figure of an adult of this fine species (PL 10, fig. 60). I 

 have a specimen before me uniform yellowish brown, without 

 bands. 



S. UNDATIRUGA, Bivona. PL 5, figs. 71, 72 ; PL 6, figs. 73, 74. 



Whorls angulated in the middle and nodulous on the angle, 

 above it the surface is smooth, below the nodules are continued 

 as flexuose wrinkles or ribs, becoming evanescent towards the 

 base of the aperture; yellowish brown, with usually one or two 

 darker bands. L. 50, diam. 16 mill. 



Sicily, Algiers, Spain, Teneriffe, W. Coast of Africa. 



This is the S. balteata, Beck, of Kiener (fig. 72), S. corrugata, 

 Kiener (fig. 74), and S. tenuis, Gray (fig. 73). Monterosato 

 considers corrugata a synonymn, but he separates balteata and 

 tenuis as a variety under the name of similis, Bivona. 



