THE NAUTILUS. 35 



cific rank in future lists, as its differences in form and color 

 are more than varietal, (a) very conical. Indian Ocean. 



C. moneta L. var. barthelymi Bernardi. Having the extremi- 

 ties constricted and prolonged. A rare variety from NCAV 

 Caledonia. 



C. annulus L. I cannot agree with those who consider this 

 to be merely a variety of C. moneta, as the average specimen of 



each is so different in character. One can easily separate the 

 varieties of annulus and moneta by the aid of the excellent de- 

 scriptions by S. Raymond Roberts in Tryon's Manual Conch, 

 vol. vii, pp. 177-8. 



(a). A dwarf specimen in the Manchester Museum measur- 

 ing 11 mm. 



(b). var. noumeensis, Marie. Dautzenberg mentions a speci- 

 men from New Caledonia, in the Bordeaux Museum, 30 mm. 

 long. 



C 1 . caurica L. This varies greatly in form from being long 

 and narrow, to almost circular. A friend informs me that he 

 has two hundred specimens all differing in shape and color. 

 I have a specimen whose dorsal surface is decorticated so as to 

 resemble that of a C. tabescens. 



C. caurica L. var. concava Sowb. described in 1870, by Sowerb) 7 

 (from H. Owen's MSS) in his "Thesaurus Conchylior- 

 um." Said to be from the R. Gambia, W. Africa. Is the 

 locality correct for this Indian and Pacific Ocean species. 



C. caurica L. var. nana Melvill. A dwarf form of var oblon- 

 gata, Melv. 



C. erosa L. var. chlorizans. An olive-green dwarf form (18 

 mm. long Richards). 



C. erosa L. Dwarf type specimen measuring 17 mm. 



C. lynx L. var. caledonica Crosse. This well-known variety 

 has the extremities pinched and extended, making the shell 

 much narrower than the type. 



C. lynx L. Having the aperture curiously widened out on one 

 side. 



C. mauritiana, L. (a). Frequently occurs extremely conical 

 in shape. (b). Somewhat resembling C. mus, v. bicornis in 

 having a distinct lump above posterior extremity, (c). A dwarf 

 shell in my collection from the Andaman Islands measuring 

 48.5 x 32 mm. This is absolutely adult in every particular, 

 and is probably unique. 



C. mus L. var. bicornis Sow. In my experience there seem 

 to be many intermediate forms between a good pronounced 

 specimen of this variety and the type. 



