CLAVATOR. 203 



not only in the great size but also in the more produced spire, 

 9 instead of 8 whorls, the shell longer and a little more 

 solid, aperture more thickened, columellar margin longer, 

 thick, the summit subacute. (Ancey.) 



Length 144, diam. 45.5, alt. aperture 48 mm. 



Length 139, diam. 41, alt. aperture 42.5 mm. 



Northwestern Madagascar (Humblot). 



Bulimus hcrculeus ANCEY in Mabille, Diagnoses test, nov., 

 in Bull. Soc. Philomath, de Paris, ser. 7, x, 1885-86, p. 182.- 

 Clavator herculeus (Anc.) Mab., KOBELT, Conchyl. Cab. p. 

 972. Clavator balstoni Angas var. ? herculea Ancey, The 

 Nautilus xvi, p. 68. 



This form is spirally striate like C. eximius, of which it is 

 apparently merely a local variety. The last measurements 

 given above are from Ancey 's original description. 



96. Var. BALSTONI Angas. PI. 51, fig. 44; pi. 50, fig. 39. 



"Shell imperf orate, elongately ovate, somewhat thin, shin- 

 ing, irregularly striated, and crossed here and there with con- 

 centric lines, giving portions of the surface somewhat of a 

 tessellated appearance, rich chestnut-brown, paler towards 

 the apex; spire elongately conical, somewhat obtuse at the 

 apex; whorls 7, slightly convex, the last longer than the spire; 

 sutures impressed, margined, and crenulated; aperture 

 ovately oblong, bluish purple within; outer lip slightly arcu- 

 ate, and a little thickened at the edge; inner lip with a 

 strong callous, which is slightly flattened and expanded over 

 the columella." 



"Alt. 3 inches 9 lines, diam. 1 inch 4 lines; length of aper- 

 ture 1 inch 5 lines, breadth 9 lines." (Aug.). 



Madagascar: Ekongo on the southeast coast (Waters); 

 Imeriiia (F. Sikora) ; Antankaratra country (Humblot). 



Bulimus balstoni ANGAS, P. Z. S., 1877, p. 527, pi. 54, f. 7.- 

 Clavator eximius Sh., KOBELT, Conchyl. Cab. Buliminus, pi. 

 100, f. 1. Clavator balstoni Angas, ANCEY, Nautilus xvi, 

 p. 68. 



This fine snail differs from C. eximius in little but the 

 smaller size. Angas' type measures about 93 mm. long; that 



