.Vo. 1741. WEST ll//.7,'/ri\ C6XE8—DALL. 219 



CONUS PURPURASCENS Broderip, 1833. 



Magdalena Bay, Lower California, to Manta, Peru. 

 The color variations of this handsome species arc dazzling, but 

 the general habit of the shell is quite constant. 



CONUS PURPURASCENS, var. REGALITATIS Sowerby, 1834. 



Cape St. Lucas and southward to Peru, the Galapagos and Clip- 

 perton islands. 

 In this variety the nebulous brown obscures the brighter coloring 

 and the spiral lineation, but the mesial light spiral band is uniisualU 

 conspicuous. 



CONUS PURPURASCENS, var. REJECTUS Dall, 1910. 



Port Escondido, Gulf of California. 



This variety has the nebulous brown very pale and scattered in 

 very small patches over a pale purple or bluish ground color, the 

 whole surface in front of the shoulder being rather closely painted 

 with pale brown, thread-like, articulate, spiral lines. The pale 

 lateral band is still notable. The spire is somewhat lower and the 

 shoulder more angular than usual. The spire is ornamented with 

 a few radiating brown flammules, the sutural fasciole is excavated, 

 smooth, or with only one or two obsolete spiral stria-. 



CONUS TORNATUS Broderip, 1833. 



Cerros Island, Lower California, the Gulf of California, and 



south to Ecuador. 



The original figure in the Conchological Illustrations is quite dif- 



ferent from some of the shells to which subsequent iconographers 



have applied the name. This species is the Pacific analogue of 



( '. pealii of the Gulf coast of the United States. 



CONUS MAHOGANI Reeve, 1843. 



Magdalena Bay, Lower California, to Panama. 

 The particular mutation to which Reeve gave the name of mahog- 

 ani is an undersized slender shell, in which the brown nebulosity 

 obscures the spiral lineation. The young may be of this type while 

 the adult assumes the coloration of the norm of the species, which 

 has the nebulosity feeble and its conspicuous trait is the articulated 

 spiral lineation on a pale yellowish or bluish ground. The full-grown 

 shell rarely retains the melanitic hue of mahogani s. s., but there 

 are all intermediate color gradations. This species is ('. interruptus 

 Broderip, 1829, and Reeve in the [conica, but not the C. interruptus 

 Mawe (in Wood's Index >, L828. 



CONUS COMPTUS Gould, 1851. 



Carmen Island, Gulf of California, to Costa. Rica. 

 This species has much the coloration of the preceding with which 

 it has been too hastily united by some undiscriminating writers. 

 It is, however, a much shorter and stouter shell w it h less nebulatinn 

 and with a tendency of the spiral coloration to become associated in 

 an anterior and posterior obscure band. 



