460 NOTES ON PROSOBKANCHIATA, 



not described, the figures being considered sufficient description 

 thereof. 



LoTORiUxM coRNUTUM, Perry, sp. B. 



(Plate xvii., fig. 10.) 



Triton exaratus, Reeve; Tryon, Man. Conch. iii. p. 22, pi. 12, fig. 104. 



Apex of four and one-half whorls, brown, semitransparent, 

 smooth, shining, covered with a thin brown epidermis. I have in 

 the paper referred to above figured this apex under the name of 

 I'ritoniwm olearium, Linn. 



LoTORiUM cosTATUM, Born, sp. A. 



I'riton succinctus, Lamarck; Tryon, op. cit. p. 11, pi. 6, f. 37. 



I have not thought it necessary to figure this apex; it is exactly 

 similar to that of the preceding species. 



LoTORiUM VESPACEUM, Lamk., sp. B. 



(Plate xvii., fig. 11.) 



Triton vespaceus, Lamk.; Tryon, op. cit. p. 22, pi. 12, f. 94. 



Apex of four and one-half whorls, fairly solid, opaque, dark 

 brown at the sutures with a lighter band medially; covered with 

 a light brown epidermis. 



LoTORiUM CHLOROSTOMUM, Lamk., sp. A. 



(Plate xvii., fig. 12.) 



Triton chlorosiomus, Lamk.; Tryon, op. cit. p. 13, pi. 7, f. 47. 



Apex of four and one-half whorls, semitransparent, smooth, 

 shining, covered with a thin light brown epidermis. 



LoTORiUM AQUATiLE, Reeve, sp. A. 



(Plate xvii., fig. 13.) 



Triton pilearis, Linn.; Tryon, op. cit. p. 12, pi. 6, f. 31. 



Apex of four and one-half whorls, rather solid, semitransparent, 

 light brown, smooth, shining, covered with a thick brown epi- 

 dermis. 



