from the Silurian Rocks. 159 



8. C. ? ensis, n. sp. 



Telson magnum, G-unciale, compressum, ad basin bulbosum, ensi- 

 forme ; apice incurvo, margine dorsali crenato-serrato, lateribus 

 planis nisi utrinque costa valida subcentrali ornatis. 



In all probability this is the telson of a remarkable species ; 

 for it has the bulbous base ; but it is so compressed laterally as 

 to be almost flat, and towards the end is curved down into a 

 sabre-shape. The breadth is greatest near the base, the tip 

 rather blunt. A lateral ridge, nearer the dorsal than the ventral 

 edge, runs two-thirds along each side from the apex, but does not 

 reach the bulbous base. 



Locality. Leintwardine, Shropshire; Lower Ludlow rock. 



9. C. vesica, n. sp. 



C parvulus, biuncialis, Isevis, capita pyriformi, inflato, corpora te- 

 nuissimo abbreviato. Cephalothorax lata ovatus, apice angusto, 

 margine dorsali valde curvo. Segmenta corporis libera 5, quorum 

 ultimum longe maximum. Appendices attenuatse. 



This cui'ious bladder-like species may very likely become the 

 type of a new genus, in which case 

 Physocaris would seem appropriate. 

 Tbe posterior edge is not at all 

 truncate, the dorsal margin is much 

 curved, and the anterior end narrowed 

 and with a small beak. Ccrat. (Pliysocaris) vesica. 



10. C. cassia, n. sp. 



C. sesquinncialis, oblongus, striatus, corpore brevissimo. Cephalo- 

 thorax oblongus, antica rotundior, postice truncatus falcatus, lineis 

 subrectis reiuotiusculis. Segjncntum ultimum (solum liberum) 

 corporis angustum, a{)j)endicibus brevibus. 



The oblong shape of this obscvii'c fossil would not be quite 

 sufficient to found a species on, though it distinguishes it from 

 most others. The greatly abbreviated body, showing but one (?) 

 joint beyond the carajjace, and with very short appendages, is a 

 better character. 



Loc. Lower Ludlow rock, Leintwardine. 



One other fossil must be noticed here, as it has figured pro- 

 minently in the original description of the genus by M'Coy. 

 The C. solenoides of that author (/. c. pi. 1 E. fig. 5) is really a 

 species of Soleii or an allied genus,as I at first supposed and classed 

 it accordingly as Solenomya, CuUellus, or an allied genus. (See 

 Prof. Sedgwick'.s Lists of Kendal Fossils: AVordsworth's 'Letters 

 on tlie Lakes,' 1813-1846, Appendix.) 1 have nowhere given it 



