8 



arched, while the under margin is sinuated. The valves of the cara- 

 pace are convex in the centre and are of a shining white colour. 



In form this species resembles considerably the C. clavata, Baird, 

 Brit. Entomostraca, but is less club-shaped and more sharply pointed 

 at posterior extremity. 



2. Cypris Schomburgkii*, Baird. Testa subviridi, hirsuta, 

 pimcturata, ovali ; extremitate anteriore rotundata, mar- 

 gine subcompressa ; extremitate inferiore oblique-truncata et 

 mucronata, antennis pedibusque brevibus, setis plumosis. 

 (Tab. XXIII. fig. 3.) 



Long. ^ poll. ; lat. -^ poll. 



Hab. In insula St. Domingo, India Occidentali. Collegit M. Salle. 

 Museum Britannicum. 



The carapace valves or shell is of an oval form, with the anterior 

 extremity rounded in front and having its margin rather flattened or 

 compressed, the posterior extremity being obliquely truncated above 

 and terminating in a sharp point. The carapace is of a whitish green 

 colour and covered all round the edges with rough coarse hairs. The 

 valves are convex on the centre and have their surface dotted all over 

 with small dots or punctures. The antennae and legs are apparently 

 very short, and the setae of both are shortly plumose. 



This is the largest species of the genus I have yet met with, being 

 about ^th of an inch in length. Mr. James, in his account of the 

 Expedition to the Rocky Mountains, mentions his finding a Cypris 

 along with the Apus obtusus rather more than one-fifth of an inch 

 in length. 



2. On the Genus Thalurania. By John Gould, F.R.S. 



It is now some years since I proposed the generic name of Thalu- 

 rania for the Trochilus furcatus and its near alUes. This generic 

 term having been adopted by the Pruice of Canino and others, tends 

 to show that the division is a good one, and hence a Ust of the spe- 

 cies known up to the present time, with their native habitats, may 

 not be uninteresting to the members at the present meeting. I would 

 also take the present opportunity of laying before the Society a new 

 and very beautiful species, which, as far as I am aware, is only to be 

 seen in my own collection. 



The species of this well-defined genus are — 



Thalurania furcata. 



Hab. Cayenne, Demerara, and Brazil. 



Thal. nigrofasciata. 



Hab. Woods on the banks of the Upper Amazon. 



Thal. Columbiana. 



Hab. Temperate region in the neighbourhood of Bogota in Co- 

 lumbia. 



* Named after Sir R. Schomburgk, British Consul in St. Domingo. 



