PERISTERNIA. 81 



P. SPINOSA, Gray. 



Shell fusiform, white, covered with a smooth brown periostra- 

 cum ; whorls seven, upper ones with a series of conical tubercles, 

 the last with distinct spiral ridges and a sub-posterior series of 

 conical spines; canal sub-cylindrical, with the mouth about as 

 long as the spire ; throat ridged ; pillar with three very slight 



plaits. 



Sierra Leone. 



This species, the type of which is said to be in the British 

 Museum, was described over forty years ago, but not figured. 

 It has not been recognized by subsequent authors. It appears 

 to correspond in some degree with P. spinosa, Mart, The name 

 being pre-occupied, I would give it another if I knew the species 

 to be a good one. 



P. PULCHELLA, Reeve. PI. 64, figs. 53-57. 



Fulvous brown, sometimes white, with brown bands ; aperture 



violet. Length, 1-1*10 inches. 



Zanzibar; New Caledonia. 



Var. MARIEI, Crosse (fig. 57). Brown or white, with brown 

 bands and base ; whorls with a more defined shoulder than in 

 the type. 



New Caledonia. 



I think that P. Sutoms, Kobelt (fig. 56), described from a 

 single specimen, locality unknown, is identical. 



P. INCARNATA, Desh. PL 65, figs. 63-66, 69, 70. 



Orange-brown, aperture rosy. Length, '75-1 *30 inches. 



Philippines ; Indian Ocean ; Red Sea. 



Ricinula pulchra, Reeve (fig. 64), appears to be the same 

 species ; it has the teeth on the outer lip characteristic of Sis- 

 trum, but there are two folds on the columella. 



Var. ELEGANS, Dunker. Fig. 65. 



Yellowish brown, with dark brown between the revolving ribs ; 

 whitish within. Length, *66 to 1 inch. 



Viti Isles. 



P. gemmata, Rousseau, non Reeve (fig. 66), is probably the 

 same form. 

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