CHITON-TONICIA. 89 



C. DISCOLOR Souverbie. (Vol. XIV, p. 175). PI. 10, figs. 3, 4 

 (this vol.) 



The reference to plate is incorrect in the text. Synonym is : Lepi- 

 dopleurus ectypus Rochebr., Bull. Soc. Philom. 1883-1884, p. 37. 

 A well grown specimen before me measures 28 mill, long, 16 broad. 

 It is closely allied to C canaliculatus Q. & G. 



C. RUBicuNDus Costa. (Vol. XIV, p. 182). 



Has been reported from the Balearic Is. by Hidalgo. The name 

 0. scytodesma should be removed from the synonymy. Scacchi's 

 description in Cat. Reg. Neapolitani p. 9, is insufficient for identifica- 

 tion, but suggests Callochiton laans rather than this species. 



C. suLCATUs Wood. (Vol. XIV, p. 191.) 



The authority " Sowerby " was wrongly written in the text. 



Genus TONICIA Gray (Vol. XIV, p. 194.) 



Add to synonyms : Lucia Gld., Otia Conch, p. 242 (preoc). — 

 iMcilina Dall, Proc. U. S. Nat. Mus. 1881, p. 284, 287. (Type of 

 both, C. confossus Gld.). 



Toniciopsis (in part) Thiele, Das Gebiss der Schneckeu, ii, p. 371, 

 for pida 'Rve.,"maillardi Dh., wahlbergi Kr. 



If a separate subgeneric name is needed for the Oriental Tonicias 

 with posterior mucro (division 3, of my arrangement, vol. xiv, p. 

 206), we may use Luclllna; Toniciopsis becoming a synonym. The 

 latter was founded upon a species of Tonicia (Lucilina), a species of 

 Onithochiton, and a Plaxiphora ! This instance well shows the 

 fatuity of founding genera upon slight variations of a single organ, 

 as Thiele has done, 



Tonicia lineolata (Fremb.) Hutton, Manual of the New Zea- 

 land Mollusca, 1880, p. 114, reported from Dunedin, Auckland 

 Islands and Campbell Island, is not likely to be the Chilian form 

 described in Vol. XIV, p. 198. 



T. INSCULPTA Souverbie. PI. 10, figs. 10, 11. 



Shell oval,subdepressed, obtusely carinated, having flat tubercles, 

 and sculptured with depressed points; mainly of a green color. 

 Tubercles subtriangular, depressed and scale-like, but little pro- 

 nounced on the anterior valve, where they are arranged in rays, and 

 extending alou<r the dianjonal line of the intermediate valves, with a 



