289 



Guppy Rbprint 



141 



of South America. The African Shell figured under the name of 

 Margaritana pfeifferia?ia by Bernardi (Jonrnal de Conch. 1860, 

 PI. xii, F. 1, 2) bears much likeness to the species named, which 

 are all closely related. 



^. Cyrena semi striata, Desk. 



I had attached the MS. name of craigiana to this Shell ; but 

 a closer comparison of the numerous specimens contained in a 

 Slab presented by Mr. Craig to the Victoria Museum caused me 

 to feel doubtful whether it ought to be accounted distinct from 

 the C. semistriata of the European tertiaries (Pictet, Paleontol- 

 ogie, PI. Ixxvi, Fig. 10 ; and Forbes, Isle of Wight, PI. iii, F. 

 2). It is akin to C. solida Phil, of Central American Rivers. 



5. There is also a very remarkable Bivalve whose fragment- 

 ary condition prevents determination. 



The collection indicates fluviatile or estuarine conditions and 

 has resemblances to the tertiary deposits of the Amazon's valley 



Page 115 



whose Fauna has been described by Conrad (Amer. Journ. Conch. 

 1870) and Woodward (Ann. & Mag. N. H, 187 1.) I am of opin- 

 ion that a pliocene age is denoted. 



Note. — In addition to the papers referred to by Woodward 

 in the place above cited there is a paper by Etheridge in the 

 Journal of the Geological Society of London, 1879, P. 82 on Fos- 

 sils collected by Barington Brown in the Amazon's valley. 



