LINES OF DESCENT. 8&9 
Small cylindrical varieties pass into the— 
N. bibalteata, Pease. 
Unifasciata, Pease. 
Microstoma, Pease. 
Fratercula, D’k’r. 
Babylonica, Watson. 
Dermestina, Gould. 
Tringa, Souv. 
Other varieties. N. scabriuscula, Powis. 
Nigella, Reeve. 
N. glaberrima, Gmel. I consider this to be a form of N, in- 
crassata, Miill. Its varieties are very numerous, at least fifty are 
before me. 
N. cuvieri and lacepedu, Payr. 
Variabilis, Phil. 
Tinei, Marav. 
Unifasciata, Kien. 
Gallandiana, Fischer. 
Maderensis, Reeve. 
Encaustica, Brusina. 
Gemmellari, Biondi. 
Intimately connected with these shells are the following, most 
ef which are West Indian forms :— 
N. paucicostata, Marr. 
Quinqueplicata, Marr. 
Rotundicostata, Marr. 
Annellifera, Reeve. 
Obtusata, A. Ad. Philippines. 
Variety. West Indies. 
Hanleyana, Marr. 
Nucleolus, Phil. 
Pura, Marr. 
Versicolor, C. Bb. Ad. 
Sanctez Helene, A. Ad. 
Acuta, Captr. 
Crebristriata, Captr. 
A specimen of the N. Sternsiana, Garrett, has just come to 
hand; it proves to be a variety of the N. crenolirata, A. Ad., from 
Singapore. The author had his doubts and sent for information. 
