46 DEVONIAN FAUNA. 



Size. — 5 mm. in length. 



Locality. — Luramaton. 



Remarks. — The anterior portion of the 6gured specimen is unfortunately 

 missing, and therefore the properties of the notch and beak, of the existence of 

 which there are some indications, cannot be denned. On account of the high 

 position of the broken part, and the great posterior convexity of the valve, it 

 seems preferable to regard this fossil as a Gypridina rather than as a Poly cope 

 such as that represented by PI. IV, fig. 12, which has less convexity, and no 

 ventral overlap, and in which the slight damage on the edge does not necessarily 

 indicate the loss of a beak. 



3. Cypridina? sp. PI. IV, figs. 18 a, 18 b, 18 c. 



Description. — Valve ovate and pyriform, very convex in the posterior half, steep 

 on three of its margins and tapering towards the anterior extremity, which is 

 broken away and obscured by the matrix. Edge view of the carapace (if the two 

 valves were closed) ovate, acute anteriorly j end view subcircular or obovate. 

 Remaining portion of test smooth. 



Size. — 6 mm. in length. 



Locality. — Lurnmaton. 



Remarks. — The fossil here indicated differs from any known similar forms by 

 its great posterior convexity. The defective specimen figured is the only one 

 which I have at present, but two other fine examples of Oypridinads in my 

 collection, which were unfortunately destroyed by accident before they had been 

 properly examined, would probably have thrown further light upon the species. 

 It is evidently nearly related to the form shown in fig. 6 in its shape and relatively 

 high posterior convexity, and may turn out to be a variety of the same species. 



2. Genus. — Cypridinella, Jones, Kirlcby, 8f Brady, 1874. 



Certain species were separated from Gypridina in the 'Monogr. Brit. Foss. 

 Biv. Entom. Carbonif. Cyprid.,' p. 21, as having both the front and hind margins 

 more or less produced and angulate. The genus does not appear to have survived 

 the Palasozoic Age. 



1. Cypridinella gmga, n. sp. PL IV, figs. 16 a, 16 b, 16 c. 



Description. — Valve subovate, narrow and pointed behind, rounded (by 

 damage) in front, with a faint indication of a small notch. 



