322 BEV. E. B. WATSON ON THE 



(as B. variegatum), Aquat. Obs. p. 53, f . 4 ; Lamarck (as 

 T. variegatum), An. s. Vert. vu. 178 ; & 2nd ed. Desh. ix. 

 623 ; Deshayes (as T. variegatum), Encycl. Method, nr. 

 1054, plates vol. in. ccccxxi. 2 a, b (the nomenclature of 

 the plates being by Bory de St. Vincent, Aug. 1, 1824, the 

 text by Deshayes in 1832); Philippi (as T. tritonis), 

 Enumeratio, I. 212, & n. 183 ; Kiener, Iconog. (do.) vol. Vlil. 

 28, ii. ; Eeeve, Conch. Icon, (do.) vol. II. i. 3 & ii. 3. (L., 

 N., W.) Ennchal, Piedade. Not very uncommon. 



351. Troclms (Clanculus) Bertheloti, 1839, d'Orbigny (as Mono- 



donta), Moll. Canaries, p. 81, vi. 17-20 ; Philippi, Conch.- 

 Cab. 2nd ed. vol. n. pt. 3, p. 271, xxxix. 17 ; Eischer in 

 Kiener, Iconog. vol. xi. p. 295, xcv. 1. Hab. Madeira. 

 (M., L., N., Jn., Vf .) Erom the Gorgulho to Punta de Sao 

 Lourenco and Porto Santo. Not abundant. — For the 

 original definition of Clanculus by de Montfort see Conch. 

 Syst. 1. 191. Adams's definition I am unable to understand. 

 The umbilicus in the T. Bertheloti is a true, not a " false " 

 one, and though turreted like a corkscrew is perforated 

 to the very apex. The one most prominent feature by 

 which de Montfort differentiates the group is the umbilicus, 

 and to alter his defiuition to " perforee ou nou ombiliquee " 

 is impossible. 



352. Troclms (Gibbula) Candei, 1839, d'Orbigny, Moll. Canar. 

 p. 82, vi. 21-23 ; Philippi, Conch.-Cab. 2nd ed. vol. u. pt. 3, 

 p. 227, xxxiv. 15. Hab. Canaries. (L., N., Jn., W.) 

 Everywhere ; extremely common both in its typical form and 

 in that of the umbilicated var. of T. Sauleyi, of which 

 d'Orbigny made a separate species. 



353. Troclms {Trochocochlea) colubrinus, 1849, Gould, Bost. Soc. 

 Nat. Hist. in. 107; Exploring Exped., Shells, p. 183, 

 fig. 223; "Watson, 'Challenger' Keport, p. 63. Hab. 

 Canaries and Madeira. (L., N., Jn., W.) Everywhere ; 

 excessively common. — The name T. Sauciatus, Koch, as of 

 earlier date, has been suggested for this species, but for 

 Gould's species there is certainty, while for Koch's the 

 habitat is unknown and the description — " centrum " of 

 the base " vertieft unci schwarz-rothgefleckt " — is quite 

 inapplicable. Does any one know what Koch's species 

 was ? My lamented friend Dr. Eischer, whose knowledge 

 and judgmeut were equally trustworthy, regarded (see 



