1M> < IIITON. 



SAVK.NV, iWript. de 1'Egypte, Gasterop., t. 3, f. 9. Chiton 

 Malar. Mar Kosso, p. 234 (1869). C. .<V/////x <iray, 

 COOK i- . Ann. Mag. N. H. 1885, p. 275. E. A. SMITH. IW. /ool. 

 Soc. Lond. 1891, p. 392. 



I have not seen this species, which is considered by Cooke and 

 Smith to be synonymous with the common Mediterranean C. x/V///*/s 

 of Gi iceua Spengl.). Smith says that it " may be regarded 



as a stron.L'ly marked form of the Mediterranean species. There is 

 also a species found in New Zealand, C. siculoides Cpr., MSS.= C. 

 wens Reeve, which is also inseparable." As I do not know that 

 Mr. Smith's opinion is founded upon a study of the inside as well as 

 the external characters, I prefer to retain C. affinis as a distinct 

 species for the present, although it is certainly closely allied to C. 

 olimren.4. Issel gives both figs. 8 and 9 of Savigny's plate as illus- 

 trations of his species, but his description applies only to figs. 9. 

 Savigny's figs. 8 represents, in all probability Callistochiton adenensis 

 Smith. 



C. RUBICUNDUS Costa. PL 45, figs. 73, 74, 75. 



Shell similar in form and color to Trachydermon rnber, but much 

 smaller; subelongate, much elevated, the valves beaked; dorsal 

 ridge very acute ; mucro median, elevated. Entire surface micro- 

 scopically granulose, the central areas having spaced, longitudinal 

 parallel sulci, 6 to 9 on each side; lateral areas snbelevated, smooth. 



Inside having 8-10 slits in the anterior valve, 1 in the central 

 valves, 9 in posterior valve ; teeth acute, but all distinctly serrated : 

 eaves moderate; sinus moderate; sutural-plates joined by a si.iall 

 serrated lamina. 



Girdle regularly imbricated with large, solid, smooth scales. 



Length 8$, breadth 5 mill. ; divergence 80. 



Length 6, breadth 24 mill. 



A, Philippi) ; Dalmatia (Mus. M'Gill Coll. and Acad. Nat. 

 I'hila.) 



Chitnn rnb,'rundu8 O. G. COSTA, Catalogo sistematico e raLrimat> 

 de 1 Tortaori d-lhi due Sicilie, p. i, iii, t, 1, f. 2 (Naples, 1829); Fauna 

 di Napoli, Aniiu. Mulli, Chiton, p. 8. Chiton j<l<-hf//ti.< Pim.irri, 

 KIIUIII. M..I1. Sicil. ii. p. 83, t. 19, f. 14. Chiton rubella* Cnt., M*. 

 olim, and C. /'/,////////.< Cri;.. V\ 



Doubtful synonyms: Ch. free law fi PORBEB, I{-|>. Ai-ir. Invert., 

 in K-p. i::th in.M-tin- Urit. Asso. Adv. Sci., for 184:;. ,,. i-s'^j (1844). 

 C. scytodern .\\, < '. /,// /'//;>;, // 



