lOO 



THE BRITISH NATURALIST. 



[May 



Mr, R. B. Newton, in the "x\nnals and Mag. of Nat. Hist." for 

 April, has a paper on the use of the name Cyclostoma. It seems that 

 the term Cyclostoma was first appUed by Lamarck (1779) to what we 

 now call Scalavia ; but Scala is the earliest name for that genus (as 

 had been previously pointed out by Dall — " Bull. Mus. Comp. Zool.," 

 XVII., p. 299), and Cyclostoma, ^799) its synonym. The next use of 

 Cyclostoma was also by Lamarck (^1801) for what he afterwards called 

 Delphinida. Mr. Newton drops Cyclostoma altogether, and still writes 

 'Delphinula (1803) for this genus, though according to strict priority we 

 ought apparently to wTite Cyclostoma delphimis (L.)" 



Now coming to the Cyclostoma of all modern authors, we find that 

 it was first called Pomatias by Studer, in 1789, with our Cyclostoma 

 elegans for the type ! Mr. Newton adopts Pomatias for Cyclostoma, and 

 proposes that the name of the family Cyclostomatidce be changed to 

 Pomatiida. 



Finally, we find that the Pomatias of Hartmann and all authors is 

 said to be without a name, and it is accordingly called Hartmannia, 

 R. B. Newton. 



There is, however, a sub-genus called Cavdiostoma by Sandberger, 

 founded on a fossil species from the Eocene, which is supposed to fall 

 under Pomatias of authors. Possibly there are good reasons for con- 

 sidering it distinct, but failing such, Cavdiostoma, Sand. (1874), ought 

 to be used for Pomatias, Anctt., instead of Havtmannia. Havtmannia, 

 as a generic title, has been twice used in botany, but Havtmannia, 

 Spach., is but a section of Oenothera, while Hartmannia, D.C., is con- 

 sidered identical Hemizonia. , 



Anotiis, Westerlund, is the first of four names proposed for sections 

 of the genius Pomatias, Auctt., in 1883 ; but whether such names could 

 be used in a generic sense is perhaps doubtful. P. patulus, Drp., falls 

 in sect. Auritus, Wst. 



Limnoca palustris, var. nana, of the "Brit. Nat. Cat." { = minov, 

 Taylor, preocc.) seems to be practically identical with the var. minima 

 of Baudon. This latter name will have to be used instead of nana. 



In the "Journ. of Conch." 1889, p. 63, a small species of Pupa from 

 Colorado was named P. co/oradciisis, but not described. It is a distinct 

 ^:ipccTcs. allied to covpitlcuta, but decidedly smaller (length i^- mill.,) 

 more striate and slightly narrower. There are four aperturai lamellae. 



• There is a genus of fishes named CycIosfu)ua, Nilss., but this is of later date (1832). 



