HKBRA. 



4.'; 



ii^ (U'liiu'd by nodulos ; ril)K not closo, IViMiiuMitly lirokcn into 

 nodules by the reyolvinji' strisi' ; oohimelln eallus rather widely 

 spread. Usually oliye, chocohite or nearly black, light banded 

 on the periphery and tleckod with revohing chestnut spots ; 

 sometimes the shell is nearly Avhite, and then, wiiilst retaining 

 the red si)ots, tlie l)and is also red, or absent. 

 lAMigtii. MJ-'H inch. 



Went Indies ; AiUudie Coaxt of the United States, no rl hwnrd 



to Chempeake Bay ; liin Jnutiro, Brazil. 



Say's type was a stunted sjjecimen, and is badly iigvired (tig. 

 1 ^>8). Reeye's lignre represents a yery ditt'erent sjjecies. a juyen- 

 ile N. .subsj)inosa. Lam., from the Philippines : but N. Anfillnrum, 

 Phil. (ligs. 199-201 , and X. Htiirmii, Phil. (lig. 202 >, ^vill give a 

 fair representation of tlie nsual range of the species in size and 

 color. M. fessella/a, \\ee\e (tig. 203 \ N.fida, Keeye (lig. 204 j. 

 both described Avithout locality, and N. ciniaculus, Reeye (tig. 

 205), from St. Thomas, W. I., are also synonyms. N. Frefenses. 

 Perkins (fig. 206), is supposed by its author to possess distin- 

 guishing characters in its proportions, sculpture and color, but 

 it is well within the range of variation of X. ribe.r, in all these 

 particulars: it is found, though rarely, at Xew Haven, Conn., 

 and near Salem, Mass., and may have l)een carried there with 

 southern oysters. N. paucicostata. Marrat. an unfigured species 

 from Nassau (Bahiynas?), is also a probable synonym. N. poly- 

 gonafa. Lam. (tig. 207), is certainly very closely allied to N. 

 vibex ; it has been misunderstood by Reeye, avIio has figured for 

 it a yery different species, and Kiener has confounded with it -A^ 

 Jacksoniana. Quoy, a var. of N. monile. Kiener. 



Siib;;eiuis Hebra, 11. :nil A. Atlauif^. 



I retain this group after modifying the original diagnosis, 

 which only applies to immature specimens. The muricated or 

 spinose ornamentation forms a convenient separation from 

 Fhrontis, and the columella callus is also more defined, but the 

 spire is not " elevated '' more than usual, nor is the outer lip 

 without yarix or denticulations, when mature. 



X. SUBSPINOSA. Lam. PI. I'i. tigs. 208-212. 



Spiny, nodulous, the nodules generally forming three promi- 

 nent revolving series on the body-whorl, but sometimes subor- 



