X" 1741. WEST \\li:i,'lc\\ CONES DM. I.. 221 



CONUS GLADIATOR Broderip, 1833. 



Gulf of California to the Galapagos Islands. 

 This is the analogue of the Atlantic ('. mus. It is very uniform in 

 its dull and unattractive coloration and in spite of Tryon's opinion 

 seems in no way closely related to ('. hrunneus. We do not have it 

 from the mainland south of Panama Bay. 



CONUS VITTATUS Hwass, 1792. 



Acapulco to Panama.. 

 Specimens from the Tres Marias Islands are more vividly colored 

 than those from the mainland. A question arises as to the relations 

 of this species with C. coffea Linnaus, or fumigatus Hwass, reported 

 as West Indian, but of which no West Indian specimens have been 

 noted by us." The C. orion Broderip seems to be a variety in which 

 the spire is not convex; variations in this character can be noted in 

 our series. C. cumingii Reeve, 6 which is united with this species by 

 Tryon, does not seem to me to be at all nearly related to our species; 

 it is a Philippine shell. ('. lienoquei Bernardi, which Tryon unites with 

 ('. orion, is doubtless a. synonym of C. rittatiis. 



CONUS GRADATUS Mawe, 1828. 



Gulf of California. 



This belongs to a. group of cones of which C. proteus, ('. floridanus, 

 and similar species are members, and about which, owing to a. wide 

 range of color-pattern, much confusion has existed. The only way 

 to determine the names of the different forms is to go back to the 

 author's original descriptions and figures, those of subsequent authors 

 almost invariably including a certain amount of confusion; and yet 

 when the different forms are segregated there is little difficulty in 

 discriminating between well preserved specimens. In every case here 

 cited the species is believed to be that of the original author, and the 

 attributions of later writers, unless otherwise stated, are ignored. 



The norm of this species is a rather slender shell with a moderately 

 exserted sharp spire with slightly concave walls, the coloration being 

 squarish brown maculations on a white ground color. The following 

 forms may be regarded as species or varieties; all that can be said 

 is that for the most part they are easily separated. 



CONUS SCALARIS Valenciennes, 1832. 



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



This is a larger shell with < united or scalar spire and generally with 

 less brown color and more white ground exposed. 



CONUS REGULARIS Sowerby, 1841. 



Gulf of California to Panama. 

 This is a shorter and wider shell with a. short conical spire, longi- 

 tudinal brown nebulous streaks and spiral articulated lines, which 



" The (inly specimen so named in the collection is one identified by I >r. I'. I'. Car- 

 penter which was collected ;il Aden, in the Red Sea. 



^C'onch. Iconic;!, (onus, Suppl., %. 282. 



