STROPHOCHEILUS-BORUS. 23 



teristic. I have four specimens of this species before me, and from 

 a study of them and the literature, it seems to me impossible to make 

 any separation between cantagallanus and proximus. 



Var. INTERCEDENS Martens. PI. 10, figs. 53, 54. 



Shell ovate-elliptical, the larger part of the penultimate whorl dis- 

 tinctly granulated, but gradually passing from dark reddish-brown 

 to brown-yellow, the last whorl evenly convex, with numerous 

 malleations or hammer-stroke-like impressions, forming spiral series ; 

 shining brownish-yellow, with numerous narrow darker streaks, the 

 suture less oblique than in ovatvs, whitish, an indistinctly defined 

 band under it gamboge yellow. Aperture pear-shaped, somewhat 

 narrowed below ; peristome thick, pure white ; outer lip beautifully 

 curved; columellar margin arising bow-shaped from the basal mar- 

 gin, and passing obliquely into the parietal wall above, here being 

 flattened, not cord-like ; outside edge thick, appressed. Parietal 

 wall with a thick porcelain-white deposit, sharply defined outside as 

 in B. valenciennesi, not so thin and outwardly attenuating as in 

 ovatus ; having in the superior angle a nodule-like swelling on its 

 edge. Length 110, breadth 69 , greater diam. 72, lesser 55 -^ mill. ; 

 aperture, length 63J, breadth 42 ; measured inside cavity, length 

 57, breadth 31 mill. (Martens'). 



Bahia, Brazil ; I specimen (Fokkes coll.). 



Bitlimus intercedens MART., Novit. Conch, v, p. 14, pi. 141, f. 1, 

 2. PFR., Monogr. vii, p. 13. 



It is not possible for me to recognize any described species in this 

 specimen. While the surface features of the last whorl are very 

 similar to B. ovatus, the general form is between that species and 7>. 

 cantagallanus ; the slender form of the apex, and the characters of 

 the peristome agree better with the preceding species than with 

 ovatus. (Martens). 



Compare 8. gummatus Hidalgo. 



S. GUMMATUS Hidalgo. PI. 11, figs. 57, 58 , pi. 19, f. 40 ; pi. 20, f. 

 41. 



Shell subimperforate ovate-attenuate, solid, rather thick. Pale 

 rose, under a varnish-shining fulvous epidermis irregularly marked 

 with chestnut streaks. Spire slender, conic, somewhat obtuse ; 

 suture distinct; whorls 5-1, slightly convex, rapidly increasing, the 

 first obsoletely radially costate, the rest longitudinally somewhat 



