THE SUBGENUS CYLINDER. Tl 



into a conical prolongation, provided with two series of 

 hooked and subulate teeth. Indeed, the bite of C. textile, 

 C. aulicus, and C marmoreus is most severe, especially as 

 it is supposed that venom is introduced into the wound, 

 causing great difficulty in healing, while the pain continues 

 intense for a long period. 



Many monographs and illustrated descriptions of this 

 diversified genus have been published^ the best known 

 being Reeves'"s ^ Conchologia Iconica,^ vol. i. (1843-44), 

 with a Supplement of 8 plates, dated some years later, 

 337 species being described in all, and Sowerby's 'The- 

 saurus Conchyliorum^ (1869), forming vol. iii. of the 

 work, 450 species. 



Kiener, ' Coquilles Vivantes,^ 324 species. 



Weinkauff, in Kiister^s continuation of Martin and 

 Chemnitz^s ^ Conchylien Cabinet-* (1875), describes '411 

 species. 



The latest monograph is that of Mr. G. W. Tryon, jun,, 

 of Philadelphia (published 1884), in which about 450 

 species, not including varieties, are recognized. He bases 

 his classification on Weinkaufi'^s Catalogue, dividing the 

 genus into seventeen sections, of which the Texti, forming 

 the last or 17th group, are equivalent to the subgenus 

 Cylinder, of Montfort, now under discussion. 



Most conchologists, however, including the brothers 

 Paetel, in their 'Conchylien Sammlung,^ 2nd ed. 1884, 

 still follow the lines of Messrs. H. & A. Adams, as given 

 in their recent ' Mollusca^ (1858), and which appears to me 

 to be simple and less artificial. As all agree, however^ in 

 the limitation of the group now under discussion, it is out 

 of place to enter into the merits or demerits of the various 

 plans proposed for the arrangement of the whole genus. 



Out of 450 species known of Conus, but 26 are cata- 

 logued by H. & A. Adams, as appertaining to Cylinder; 



