DECAPOD CEXrSTACEANS OF THE OXFOKD CLAY. 551 



propoclite of the first pair about three fourths the length of the 

 carapace, and three or four tirues as long as wide, subterete, with 

 one side flattened ; the rounded portion has several, 6-10, rows 

 of pointed tubercles ; the inner border is compressed, trenchant, 

 and, as in some other species of Glyijliea, bears an interrupted 

 series of large and small teeth, the terminal one of which ex- 

 tends beyond the distal end and constitutes a rudimentary fixed 

 finger. (Dactylopodite imperfect.) A specimen exhibiting a portion 

 of one of the antennae indicates that they were long and multi- 

 articulate. 



Carapace 24 millim. long ; 11 millim. high. 



Rare in the Oxford Clay, St. Ives. 



Coll. Specimens are in the collections of Thomas George, Esq., and 

 in my own ; also in the Woodwardian Museum. 



This species is allied to G.piistulosa, Meyer, G. Etalloni, 0pp., and 

 G. Milnsteri^ Yoltz. From the two former it is distinguishable by 

 the difference in the carination of the cephalic portion of the cara- 

 pace, and in the form and proportions of the epibranchial lobe. 

 The characters of the cephalo thorax are very similar to those of 

 G. Munsteri as figured by Meyer (IN'eue Gatt. Foss. Kr. tab. iii. 

 fig. 23), but a difference appears to exist as to the cephalic carinae, 

 and Meyer's figure does not indicate the ridge of tubercles along- 

 side the posterior portion of the central cephalic carina. The 

 chelae of the first pair of claws, which are fortunately preserved 

 in situ in a St. Ives specimen, bear no resemblance whatever to 

 those figured by Meyer (1. c. tab. iii. figs. 24, 25). Oppel's en- 

 larged figures of G. Munsteri (Pal. Mitth. tab. xvii. figs. 4, 5) differ 

 considerably from those of Meyer, and do not at all apply to the 

 Huntingdonshire specimens. Much confusion exists, especially 

 among continental palaeontologists, as to E. rostrata, Phillips, which 

 is, however, a well-marked and quite distinct species, as both Dr. 

 Woodward and Professor M'^Coy have determined, and does not 

 occur in the Oxford Clay, so far as I know. 



Gltphea Regletana, Meyer, Neue Gatt. Foss. Krebse, tab. iii. 

 figs. 14-21 ; Etallon, Notes sur les Cr. Jur. tab. iii. figs. 11, 12; 

 . Oppel, Pal. Mitth. tab. xvii. figs. 2, 3. 



A single specimen, consisting of a portion of the carapace, which 

 exhibits the postero -lateral border and the metabranchial lobe, and 

 also several segments of all the limbs of the left side, presents cha- 

 racters which so nearly agree with those of Glyphea RegUyana as 

 fully to warrant provisional reference. The portions preserved do 

 not afford any details in addition to those given in full by Meyer, 

 Etallon, and Oppel, except that the mcropodite of the anterior two 

 or three pairs of limbs bears a row of acute spines on the posterior, 

 and a series of smaller ones on the anterior border. The surface of 

 the carapace is tuberculated, but is too much worn to determine 

 whether it was also punctated. 



M. Etallon observes that this species has a wide range, both geo- 



2p2 



