PSEUDOTROCHUS. 227 



description). Perideris kercadonis Grat., PFR., Monogr., iv, 

 595; vi, 204. SHUTTLEWORTH, Notitiae, i, p. 80. KOBELT, 

 C. Cab., p. 31, pi. 3, f. 1, 8. *Bulimus interstinctus Old., 

 REEVE, C. Icon., v, pi. 89, f. 367c. 



Grateloup's figure (fig. 77) and description are given. The 

 single specimen before me (pi. 8, fig. 41) is pale yellow 

 around the middle of the last whorl, whitish above and be- 

 low. The irregularly-spaced, deep brown streaks are widest 

 and strongest where they cross the periphery. They hardly 

 reach the suture, and a small basal tract is free from them. 

 The columella is bounded by a purple-brown band. The 

 periphery is indistinctly subangular. It is conspicuously 

 thinner than P. interstinctus. This specimen is labelled 

 "Cape Palmas." 



8. P. ^QUATORIUS (Reeve). PI. 13, fig. 39. 



Shell acuminately oblong, whorls 7, swollen, rounded, 

 smooth, obliquely finely striated, encircled with a small spiral 

 crenulated ridge at the sutures; columella scarcely trun- 

 cated, lip simple. Ash-blue, whitish towards the apex, 

 sprinkled irregularly with brown streaks and spots (Reeve). 



West Africa: Banks of the Gaboon river (Cuming coll.). 



Achatina ccquatoria REEVE, Conch. Icon., v, pi. 1, f. 2 

 (Feb., 1849). A. interstincta var. 6, PPR., Monogr., iii, 480; 

 Conchyl. Cab., pi. 25, f. 26. ? P. cailleana KOBELT, Conchyl. 

 Cab., p. 47, pi. 16, f. 9. 



The marking of this species, from a locality nearly on 

 the equator, is very peculiar, not disposed in regular stripes, 

 but wavy and scattered ; the whorls are more than usually 

 rounded, and the apex has a papillary aspect ' (Rve.). It 

 is a more solid shell than P. cailleanus, with darker ground- 

 color; but both Pfeiffer and Morelet considered the two to 

 be varieties of one species. Figure and description are 

 from Reeve. 



9. P. CAILLEANUS (Morelet) . PI. 13, figs. 37, 38. 



Shell imperforate, ventricose-conic, pellucid, thin, im- 

 pressed with obsolete, unequal strias ; white, uniform or flamed 



