BULIMULUS-BOSTRYX-LISSOACME. 101 



Bulinu* conspersus SOWB., P. Z. S., 1833, p. 73; Zool. Beechey's 

 Voy., p. 145, pi. 38, f. 17 ; Conch. Illustr.,f. 49. Bulimus con*perus 

 PFR., Monogr., ii, p. 190. HIDALGO, Viaje al Pacif., p. 125 ; Journ. 

 de Conch., 1870, p. 60. ?. conspersus RVE., Conch. Icon., f. 137. 



Sowerby, in his original description, mentions two forms of this 

 species, one more ventricose than the other. Reeve has called the 

 stouter form B. coagulatus ; but Hidalgo reunites the two. The 

 series of coagulatus before me shows no slender individuals ; but I 

 have not been able compare Reeve's form with conspersus, as that 

 species is not represented in our collection. 



B. COAGULATUS Reeve. PI. 49, figs. 30, 31. 



Shell narrowly umbilicated or perforate, globose-ovate, thin ; 

 white, densely mottled with corneous or corneous-brown oblique 

 streaks and short transverse marks, or corneous-brown, with opaque 

 white, obliquely transverse markings. Surface shining, with irreg- 

 ular wrinkles of growth. Spire short, conic, apex corneous, smooth. 

 Whorls 5, the earlier slightly convex, last H convex, the body- 

 whorl globose. 



Aperture over half the length ; outer lip thin, acute; columellar 

 lip thin below, with a short triangular reflection above ; parietal 

 callus very slight. 



Alt. 16, diam. 12 mill. 



Alt. 13*, diam. 9 mill. 



Lima, Peru (Bland). 



B. coagulatus RVE., Conch. Icon., pi. 77, f. 558. PFR., Monogr., 

 iii, p. 418. 



Quite thin and much inflated. Hidalgo unites the species with 

 B. conspersus Sowb., but the specimens before me look much more 

 globose. 



B. MODESTUS Broderip. PI. 47, figs. 82, 69, 70. 



Shell umbilicate, ovate-pyramidal, rather thin. Surface sculptured 

 with thread-like, raised whitish and rather coarse strice, rarely with 

 traces, in some places, of spiral incised lines cutting them, or of spiral 

 series of short wrinkles, visible only under the lens. Color whitish- 

 brown, with oblique streaks of dark, dull brown in the typical form ; 

 (but in a variety rusty brown, cut into zones by narrow spind whitish 

 bands or lines, the brown zones further interrupted by whitish 

 oblique streaks. Sometimes light spirals are absent). Spire elevated, 

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