490 Dr. J. Gwyn Jeffreys 07i 



Druce tells me that it has already received a name ; but I can 

 find no published description of it, although I have gone care- 

 fully through the Records. 



Herpcenia tritogenia^ Klug. 



This and the preceding species are evidently not rare in 

 Abyssinia. H. eripMa^ which I have examined from Angola, 

 is a larger and more creamy-coloured species than H. trito- 

 genia (with which it has been united). I think the two forms 

 will prove to be perfectly distinct : the markings are not quite 

 the same on the hind wings. 



HesperiidsB. 

 Pampliila inconspicua, Bertoloni. 



Fyrgus (close to P. galha). 



Thanaos (two species near T. Motozi, Wllgr.). 



Tagiades (very near to T.Jlesus, Fabr.). 



The Hesperiida3 require figures to distinguish them readily 

 from species already described, to which they are nearly 

 allied. 



XLIX. — New and pecidiar Mollusca of the Kellia, Lucina, 

 Cyprina, and Corbula Families procured in the ' Valorous ' 

 Ewjjedition. By J. Gwyn Jeffreys, LL.D., F.R.S. 



Kelliidae. 

 Montacuta Dawsoni, Jeffr. 



Montacuta Dawsoni, Britisli Conchology, vol. ii. p. 216 ; vol. v. p. 178, 

 pi. xxi. f. 27. 



Godhavn, Disco, 5-25 fms. ; Station 4, 20 fms. ; St. 5, 

 57 fms. ; Holsteinborg, 3-35 fms. ; St. 9, 1750 fms. ; Green- 

 land (coll. Moller, in Mus. Reg., Copenhagen) : Drobak (J. G. 

 J.) : Floro, Norway, 300 fms. (Friele) : ' Porcupine ' Expe- 

 dition, 1870, off Cape Sagres, in the Bay of Biscay ; a valve 

 only: Palermo (Monterosato) . 



Body whitish and gelatinous : mantle plain-edged, although 

 at first I thought the edges were ciliated, in consequence of 

 the posterior side of the shell being fringed by the polyparies 

 of a minute Hydrozoon ; the incurrent opening is wide and 

 not tubular. 



