MAZATLAN UNIVALVES 405 



-^ 480. CONUS GLADIATOR, Brod. 



Proc. Zool. Soc. 1833, p. 55 Mull. Syn. Nov. Test. Viv. 

 p. 121. Sow. Conch. III. pi. 33, f. 34. Bve. Conch. Ic. pi. 22, 

 f, W.Kien. Icon. Conch, p. 25, pi. 15, f. 4, pi. 109, f. 4. 

 C. B. Ad. Pan. Shells, p. 105, no. 114. 

 Hhizoconus (Leptoconus) gladiator, H. fy A. Ad. Gen. i. 252. 



This unpretending species is known when fresh by its ex- 

 tremely thick, somewhat deciduous epidermis, which lies in a 

 spongy mass, with ridges of growth, and distant spiral rows of 

 hairs, which often group into pairs. It is thick on the spire, 

 with a row of scaly bristles over the tuberculous shoulder. 

 Sinus area spirally striated. The elevation of the spire is 

 extremely variable. Operculum resembling that of C. puncticu- 

 latus, but larger, less bent, and commonly decollated. The larg- 

 est sp. measures long. 1*77, long. spir. *17, lat. 1*12, div. 140. 

 Aflatsp. 1'26, 0, '83, 183. 



A slender sp. T64, '2, '9, 130, 



Hab.= Panama ; in sandy or soft mud, in the clefts of rocks ; 

 Cumin g. Do. ; at low water mark, mostly under stones 

 which were more or less mingled with sand, not uncommon ; 

 C. B. Adams. S. W. Mexico, P. P. C. Mazatlan ; rare, 

 generally encrusted with coralline, Bryozoa, &c. ; L'pool Col. 

 Tablet 1935 contains 3 sp. stout, elevated. 1936, 3 do. nor- 

 mal. 1937, 3 do. flat. 1938, 3 sp. slender, flattened. 1939, 

 3 do. elevated. 1940, 3 sp. mended after fracture. 1941, 1 sp. 

 with rough portion of epidermis removed, resembling C. regali- 

 tatis. 1942, 2 sp. epidermis removed. 1943, 4 opercula, of 

 which one is normal, and another is mended from a sub-central 

 nucleus. 



481. CONUS NUX, Brod. 



Proc. Zool. Soc. 1833, p. 54*. Mull. Syn. Nov. Test. Viv 

 p. 120. Sow. Conch. 111. pi. 32, f. 31. Bve. Conch. Ic. pi. 20, 

 f. 110. Desh. in Lam. An. s. Vert. vol. xi. p. 129, no. 185. 

 Kien. Icon. Conch, p. 47, pi. 11, f. 3, pi. 102, f. 2. C. B. Ad. 

 Pan. Shells, p, 106, no. 116. 



Coronaxis (Conus) nux, H. fy A. Ad. Gen. i. 248. 



Most of the Mazatlan specimens are distorted, but may be 

 recognized by the deep violet stain at the base, and the nearly 

 smooth epidermis, which is adherent, with faint striae of 

 growth. The spire is tuberculous, sometimes flattened. The 



