578 



Paris, and were probably in Geneva. But on calling attention 

 to the reference in the original description to their depovsition 

 in Paris, Dr. Lamy turned up Rochebrune's MS. and found 

 that when those notes were written Lamarck's types were still 

 in Paris, A further search was at. last rewarded with their 

 recovery. Pilsbry's figures in pis. 9 and 11, Man. Con., vol. 

 XV., are, I have no doubt, drawn from New South Wales 

 specimens. I agree with Mr. Tom Iredale that these northern 

 shells are a distinct species, and not Lamarck's striatus. As 

 a result of the foregoing investigation we are able to- 

 ^nize : — 



(1) Cryiyto'plax laevis, Lamarck ==C lamarcki, Rochebr; 

 probably = C^ liartmeyeri, Thiele, and is only known for "Wes- 

 tern Australia. 



(2) Cry'pto'plax sf,riatus, Lamarck, found in Victoria,. 

 Tasmania, South Australia, and Western Australia. 



(3) Cryptoplax torredani/ft, Rochebrune. Found front 

 Port Jackson northwards to Torres Straits. 



(4) Gryptoplax gunni, Reeve. Occurring in South Aus- 

 tralia and having probably a range of habitat coextensive with 

 C , strimtus, Lam., from which species it is easily distinguished 

 by its dense, very short, and slender spicules. 



Three further species are all said to occur in Australian- 

 waters : — C. ocidatus, Quoy et Gaim. ; 0. hurrowi, Smith; 

 C . michaelseni, Thiele. Tlie two first in the tropical waters 

 of Queensland, and the latter in Shark Bay, Western 

 Australia. 



Acanthochifon sneurii, Blanville. Type (Diet. Sc. Nat.^ 

 xxxvi., p. 553, Blainville). There are two specimens with 

 original label ''Port Roi George." They are undoubtedly the 

 shell we have known as Aca?Hhor/iifon asheKtoides, Smith. The 

 better of the two is similar to a pale specimen I collected at 

 Port Lincoln, in South Australia. 



Acaiitlwchiton jaciindus, Rochebrune. Type (Bull. Soc. 

 Philom., 1881-82, p. 194). There are a number of specimens 

 in spirit which are conspecific with preceding species, all much 

 wqni. 



Acanthochiton violaceas^ Quoy et Gaim. Type (Voy. de 

 rAstrol., iii., p. 403, t. 73, f. 15-20), New Zealand. These 

 are similar to specimens in my own collection from Doubtless 

 Bay, New Zealand. 



Acantliochitoti 7'ioJac(ifft, var. pajidlo. Type. On another 

 card marked "'Quoy et Gaimard, 1883, N.Z.," is a dissected 

 specimen with anterior valve missing. All valves smooth and 

 of peculiar shape. I am rather doubtful whether this is refer- 

 able to the same species. It is referred to in Voy. de 

 r Astrolabe at top of page 520 under the name //r/^/^/^o. 



