577 



Cnjpto'plax torreslanus, Rocliebrune. Type (Bull. Soc. 

 Philom., Paris, 1881-82, p. 195, 1881). The following are 

 ■copied from Rochebrune's MS. notes: — "Chitonellus s.triatns 

 (Rv., C. Icon., pi. 1, sp. 4), long. O. 060, lat. O. 004, M.M., 

 non C. striatus, Lam. Hab., detroit de Torres. Mus., Paris." 

 I compared this type with ni}' shell from Sydney and found 

 iihem conspeciiic ; my largest specimen is a counterpart of the 

 type, which is numbered N. 13, 8. 



Cri/pto'phtx fChitonellusj laevis, Lamarck. Type (de 

 Lamarck animaux sans vertebres, vol. 7, Mollusques). Lab. 

 de Malacologie, K. 82. Oscabrelle lisse, De Blainville, 

 Malac, pi. 87, f. 5. Hab. les Mers de la Novelle-Hollandiae. 

 Peron et Lesueur. I saw type marked as such in Roche- 

 brune's handwriting. The same specimen is marked "type of 

 <.i-t/ptopla.r (Chitonellus) lainarclxi, Rochebr.," and the card is 

 marked "Perdn et Lesueur, N. 1^ 3," and agrees with figure, 

 pi. 87, fig. 5, Blain., Mann, de Malacologie. This type shell 

 measures 49x12 mm., and, as just stated, corresponds with 

 the figure. Nearly the whole of the shell is eroded and the 

 girdle is denuded of spicules, except on that portion com- 

 mencing opposite valve 7, where the spicules are fortunately 

 still in evidence. These spicules are very peculiar, being 

 very widely spaced, short, blunt and rounded, quite distinct 

 from any species I have seen from either the south or the 

 east coast of Australia ; neither dofes it agree with the speci- 

 men of Cryptoplax I collected at Rottnest, in Western Aus- 

 tralia. On the other hand, the small specimen I collected 

 at Yallingup, in that State, in October, 1920, and provision- 

 -ally referred to as C . hartmeyen, Thiele — see my paper (Trans. 

 Roy. Soc. S. Austr., vol. xlv., 1921) — may be a. juvenile of 

 this species. Should this identification ultimately prove cor- 

 rect, C . hartmeyeri, Thiele (the type of which I have never 

 seen), will probably be proved to be conspecific, and name will 

 be a synonym of C . laevis. Lam. 



Cryptoplax fChifonellusJ striatus, Lamarck. Type (An. 

 S. Vert., vi., p. 317, 1819). The type specimen is marked 

 in Lamarck's handwriting, ''Oscabrelle striee, Cliitonellus 

 ■striatus. He aux Kangaroo." The type measures 46x10 

 mm.; valves 5, 6, and 7 would be slightly spaced if the speci- 

 men had been carefully dried. The sculpture is similar to 

 the common South Australian shell, and although very few 

 spicules are left on the girdle, those that remain correspond 

 with the South Australian species, which is quite natural, as 

 Kangaroo Island, in that State, is the type locality. 



Comments. — The rediscovery of Lamarck's two lost tyjDes 

 is due to the very careful search made by Dr. Lamy. I was 

 told on arrival that these types were not in the Museum in 



