546 ME. J. CARTER ON THE 



long ; distance between inner angles of orbits | of an inch ; length 

 of hand J of an inch ; width one third of the length. 



Oxford Claj', St. Ives. 



OoU. Woodwardian Musenm ; collected by Mr. Keeping. 



I have not been able to identify this fine species with any described 

 form. It resembles JEJ. harrovensis, M^Coy, from which, however, 

 it is distinguished by the highly vaulted form of the carapace, by 

 the greater comparative width of the interorbital portion of the 

 frontal border, by having shorter lateral scapular ridges, and by the 

 absence of surface tubercles in the spaces between these and the 

 central dorsal ridge, also by having the dorsal surface of the 

 propodite of the first pair of chelse smooth instead of granulated. 

 The smoothness of the mid-scapular region and the existence of a 

 sharply defined cervical sulcus will distinguish this species from 

 E. arctiformis, Schloth. It is allied to E. calvadosii^ Moriere, and 

 also to E. Edwardsii, Mor., from the Upper Lias (Calvados), 

 figured and described by M. Moriere (Bull, de la Soc. Linn, de 

 Normandie, ser. 3, t. vii. et viii.). It is distinguishable from both 

 those species by the smoothness of the mid-branchial region, and, 

 so far as can be determined by the single imperfect specimen from 

 St. Ives, by the form of the carapace ; the postero-lateralborders are 

 straighter and slightly sigmoidal, and bear longer and fewer marginal 

 spines. 



In the only specimen I have seen, the carapace is so imbedded in 

 the pyritous matrix that the outline of the antero-lateral border 

 cannot be determined. The specific name applies to the smoothness 

 of the mid-branchial region. 



Eryma Man-delslohi, Meyer, sp. (PI. XYI. fig. 2.) 



Klytia Mandelslohi, Meyer, Neue Gatt. foss. Krebse, p. 21, tab. 4. 



fig. 30. 

 Eryma Mandelshhi, Oppel, Pal. Mitth., tab. 5. fig. 3 ; Etallon, 



Notes sur les Cr. Jur. d. Bass, du Jura, pi. viii. fig. 8 d. 

 Cephalothorax longer than high, in the proportion of 7 to 4 ; 

 dorsal surface throughout impressed with rather large, deep 

 punctations, which have irregular borders, and are so closely 

 arranged as to produce a more or less reticulate appearance ; small 

 round tubercles are irregularly scattered over both the cephalic and 

 scapular regions, some of which are placed at the posterior edge of 

 a punctation, but others have no such definite relation. All the 

 sulci are deep and wide ; the epibranchial lobe is large, well defined, 

 and approximately parallel-sided. Mesobranchial ' small ; meta- 

 branchial more closely foveated than the other lobes. Chelae of 

 first pair large, of equal size, robust, rather longer than the cephalo- 

 thorax ; dorsal surface of the hand with a few small tubercles, and 

 closely punctated, as also is the palmar side ; fingers as long as or 

 rather longer than the hand, both slightly incurved in a parallel 

 direction, and distinctly foveated on both sides, the fovese being 

 larger than those on the hand ; outer border rounded ; inner margin 

 with a series of small, dentary tubercles. These chelse vary con- 



