394 Prof. T. R. Jones 8^ H. Woochcard — Fossil Crustacea. 



fossils. There is also a fragmentary specimen in the Porter 

 collection, from Pilton, near Barnstaple. Mr. Dufton's specimen 

 was redescribed and refigured by the Eev. G. F. Whidborne in 

 the ' Monogr. Devonian Fauna of the S. of England ' (PaL Soc, 

 vol. iii, pt. 1, 1896, p. 6, pi. i, fig. 3). In 1896 1 was in the Sloly 

 quarry with the Geologists' Association, and found a small slab 

 bearing one good specimen [PI. XV, Fig. 6] and a cast of another. 

 Later, the same day, the corresponding half was found by Mrs. A. M. 

 Davies. These specimens are referred to in the Proc. Greol. Assoc, 

 vol. xiv, pt. 10, p. 440, and in the Brit. Assoc. Eeport of the 

 Committee on Paleozoic Phyllopoda, 1897. In my specimen the 

 valves are slightly elongated and narrowed by shearing, but are 

 nevertheless equal in breadth to those of the first specimen. Five 

 body-segments are visible. They bear the tubercles characteristic 

 of Echinocans on their posterior margins. The other specimen, 

 occurring as an impression on the same slab, is smaller ; three 

 body-segments are seen in Mrs. Davies' lialf. Two other specimens 

 have since been found by Miss Partridge, of Barnstaple, in the 

 same locality." 



By the kindness of Mr. A. K. Coomara-Swamy we have been 

 allowed to study his own specimen, and also the two obtained by 

 Miss E. M. Partridge, of Barnstaple. One of Miss Partridge's 

 specimens (732) shows evidence of the body-segments behind the 

 carapace ; both valves are present, but rather squeezed out of shape. 

 The other specimen (759), although the valves are less perfect 

 behind, shows the anterior border with the granulated surface of the 

 valves very beautifully, and what appear to be two ocular spots (or 

 tubercles) near the anterior border. We are much indebted to Miss 

 Partridge and also to Mr. A. K. Coomara-Swamy for the opportunity 

 to see and examine these rare Devonian Phyllopods. 



5. ESTHERIINA EXTUBEKATA, sp. nOV. (PI. XV, Fig. 7.) 



This seems to be the very tumid umbonal portion of a right-hand 

 valve of an JEsiheriina, separate from the rest of the valve. The 

 flat marginal portion of the valve may have been broken away, or 

 perhaps lies hidden in the matrix. 



Size. — Length 3 mm., height 2^ mm. 



The valve is semicircular on tlie ventral and nearly straight on 

 the dorsal border ; but the swollen umbo bulges out to some extent 

 at the anterior third of that hinge-line. It slopes gently down to 

 a rather blunt angle in front, and with a short hollow slope to 

 a sharp angle behind. 



The umbo is large, convex, very smooth, and shiny, 1\ mm. 

 broad, 1mm. distant from the anterior and scarcely |^mm. from 

 the posterior angle. It extends downwards for 1 mm. nearly to 

 the middle of the valve, and is succeeded by seven concentric, broad, 

 undulatory ridges, each having a raised line, mostly ^ mm. apart, 

 with smooth interspaces. 



The strong local convexity of the valve, succeeded by a limited 

 series of coarse concentric riblets, reminds us of the similar feature 



