56 



SYKES : NEW FORMS OF CATAULUS. 



DESCRIPTIONS OF THE NEW FORMS. 

 Cataulus smithi, n. sp. 



(Fig. I.) 



Shell deeply rimate, solid, straw-yellow, the protoconch a trifle darker, 

 jjyramidal, with the spire well raised ; the earlier whorls smooth, and the 

 residue sculptured by numerous, closely set, fine longitudinal costulae ; 

 suture well impressed ; whorls 8, plano-convex, the last being a littlecompressed 

 in front ; umbilical region large, sculptured as the rest of the shell ; the 

 umbilical carina is large and distinct, with a second smaller one within; lip 

 white, continuous, sub-ciicular, slightly projecting at the base, reflected, 

 most noticeably so at the lower outer margin, canal large. 



Alt. 26.5 ; diam. max. (of last whorl) 10.5 millim. 



As compared with C. aureus the present shell is straw-yellow and not 

 golden-yellow in colour ; it is much larger with flatter whorls, the mouth is 

 sub-circular and lacks the angle at the upper right-hand margin, &c. From 

 C. aiisfrnia/nif the shape and colour of the mouth and lip, as also the elongate 

 form, will suffice to sever it ; similar variations distinguish it from the 

 white-lipped var. of C. liap.madoma I would lay stress en the second carina 

 at the base. 



The name is gi\en as a trifling recognition of the assistance that 

 Mr. Edgjr Smith has always so readily given me on any difficult point. 



Fig. i. — Catanius siinthi, u. "^xi. X 1%. Fig. 2. — Cataulus prestoui, u. s,p. x 1%. 



Cataulus prestoni, n. sp. 



(Fig. 2.) 



Shell nearly related to C. aureu-^, but differing in the following characters. 

 Colour straw-yellow rather than golden-yellow ; size smaller ; whorls not so 

 inflated ; umbilical region more rounded ; lip not so produced at the base, 

 not so much reflected, and not so 'winged' at the upper right margin: canal 

 smaller. 



Alt. 20.8 ; diam. max. (of last whorl) 8 millim. 



Dedicated to Mr. Preston, in acknowledgment of his courtesy in 

 placing at my disposal all the specimens of Cataulus he acquired of 

 HughNevill's. 



