650 MR. J. CASTER ON THE 



blance to the comparatively slender long-fingered claw figured by 

 Etallon (Bull, de la Soc. Geol. de France, ser. 2, t. xvi. pi. vi. 

 figs. 2, 3, 4) as presumably that of E. ventrosa. I dedicate the 

 species to Mr. George, in recognition of the value of his palaeonto- 

 logical labours. 



In the specimen figured the carapace rests upon one of the chelae. 



EkYMA ? PTILCHELLA, UOV. Sp. (PI. XYI. fig. 5.) 



Chelse of first pair of limbs 5 millim. in length; hand about 

 as long as wide, moderately convex transversely; borders com- 

 pressed into a blunt longitudinal keel or ridge ; dorsal surface with 

 small tubercles, regular in size and distribution, not quite a diameter 

 apart. Fingers about as long as the hand, granulated on outer 

 border ; fixed finger slightly recurved at apex ; both fingers carry a 

 series of similar denticles on the dentary border. Carpopodite about 

 half as long as the chela, granulated like the hand, as also is the 

 meropodite. Portions of several of the posterior claws remain in the 

 matrix ; they are slender, smooth, and have a series of granules on 

 their posterior border. 



1 provisionally refer these delicate little chelae to a species of 

 Eryma. Several forms of this genus, similarly small in size, occur in 

 the Solenhofen beds, but E. pulchella appears to be quite a distinct 

 species. 



Oxford clay, St Ives. 



Coll. Mr. George, Northampton. 



Specimen examined 1. 



Gltphea hispida, nov. sp. (PI. XYI. fig. 6.) 



Length of cephalothorax nearly twice and a half the greatest 

 height. Cephalic portion one fourth shorter than the scapular. 

 A slight, sharp, longitudinal, central keel, the posterior half of 

 which is closely subtended on each side by a series of tubercles, 

 extends forwards from the cervical sulcus to the rostrum ; three 

 other stronger, equidistant ridges, each crested by a series of acutely 

 pointed tubercles, occur in the space between the mid-dorsal keel 

 and the antero -lateral border ; the interspaces between these ridges 

 are smooth, but a few tubercles occur on their proximal portion, 

 especially on that nearest the antero-lateral border. A ridge, 

 bearing a string of small round tubercles, follows the contour of the 

 antero-lateral margin. Cervical sulcus very distinct. The surface 

 of all the lobes of the scapular portion is uniformly covered by 

 rather large tubercles scarcely a diameter apart, having apices which, 

 in well-preserved specimens, .are very acute and point forwards. 

 The combined epibranchials form a large central lobe, rather acutely 

 pointed posteriorly ; mesobranchial lobe clavate, distinctly defined 

 by a sulcus posteriorly, less so anteriorly ; a well-defined small lobe 

 occurs between the lower end of the mesobranchial and the hepatic 

 lobes, the latter being separated from the metabranchial by a very 

 faint sulcus. Metabranchials large. Numerous fragments of the 

 limbs occur, which indicate that they were of considerable length : 



