240 PSEUDOTROCHUS. 



NON, Bull. Soc. Malac. France, v, 70. Perideris i., PFR., 

 Monogr., iv, 595; vi, 203. KOBELT, C. Cab., p. 40, pi. 14, 

 f. 1-5; pi. 11, f. 7, 8; pi. 12, f. 3, 4. DOHRN in Pfr., Novit. 

 Conch., iv, pi. 162, pi. 137, f. 3 (var.) ; Malak. BL, xxii, 

 1875, p. 206. SCHEPMAN, Notes Leyden Mus., x, 1888, p. 

 247. P. i. var. insignis PFR., Monogr., viii, p. 266 (1877). 



Figures 29-31 represent specimens of forms ordinarily en- 

 countered, figs. 30, 31 representing a shell received from 

 Gould. The last whorl is covered with a yellow cuticle, 

 deeper in tint from the middle down; the spire is grayish- 

 or bluish- white, with very little cuticle. The last whorl has 

 a few short purplish streaks, becoming more numerous and 

 wider on the spire. 



23a. Var. FLAVUS Pils. 



The other specimen figured (fig. 29) is quite solid, white 

 under a yellowish cuticle, which is thin and more or less 

 worn on the spire; dark streaks are rare, and chiefly on the 

 spire. The columella and parietal callous are pink, the 

 aperture thickened within and white or pinkish. Usually 

 there is no trace of columellar truncation. The subsutural 

 bead-margin is very distinct. Length 49, diam. 23, oblique 

 length apert. 22 mm. This seems to be the commonest form 

 in collections, and has been illustrated by Kobelt on his pi. 

 14, f. 1-4. 



235. Var. INSIGNIS Pfr. PL 12, fig. 32. 



On a reddish or reddish-yellow ground, it is marked with 

 a wide black band interrupted with narrow, irregular yellow 

 streaks, at the periphery of the last whorl half of this band 

 showing above the suture ; above there are some narrow black- 

 ish streaks and strewn dots. Liberia (Dohrn coll.). 



Gould states (Otia, 210) that "B. interstinctus proves to 

 be very variable in form, and especially in color, being green, 

 brown ochreous, sometimes spotted, etc." 



24. P. VERDIERI (Chaper), PL 16, figs. 68, 69. 



Shell oblong-conic, solid; under a very thin fugacious yel- 

 lowish cuticle it is ivliite, a small area around the axis and 



