DECAPOD CKUSTACEANS OF THE OXFOED CLAY. 557 



Having described the Huntingdonshire forms, I will briefly notice 

 the only other species which, so far as I am aware, have been 

 recorded as occurring in the Oxford Clay at other localities in 

 Britain : — ■ 



Mecochirus Pearcei, M'Coy. 

 Glyphea leptomana, Phil. 

 Stricklandi, Phil. 



Mecochikijs Peakcei, M'Coy, Ann. & Mag. N. H. 1849, ser. 2, vol. iv. 

 p. 172. (PI. XYI. fig. 13.) 



I have not been able to ascertain that this species has ever been 

 figured or described in specific detail, probably in consequence of 

 the mutilated condition in which specimens occur, by reason of the 

 delicacy of the test. The carapace is about 2b millim. long ; the 

 surface appears to be smooth, but under a strong lens numerous minute 

 puncta are visible. The limbs are better preserved ; the first pair, 

 when fully extended, would be about equal to the combined length 

 of the carapace and extended abdomen. In a well-preserved speci- 

 men in the Jermyn Street lluseum the proximal joints measure 

 13 millim., meropodite 14 millim. , carpopodite 13 millim., propodite 

 34 millim., dactylopodite 18 ? millim. The abdominal appendages 

 appear to have been largely developed. 



Oxford Clay, Chippenham, Christian Malford, Yorkshire (Morris's 

 Cat.). 



Qoll. The British, Jermyn Street, Woodwardian, and other 

 Museums. 



Of this species I have seen perhaps as many as forty specimens, 

 all of them so crushed as to efi'ace most of the minor characters. In 

 general size it is fully twice as large as M. sociaUs, and about 

 equal to M. Bajeri., Germ., but considerably smaller than M. longi 

 manus, Miinst. The first pair of limbs may be distinguished from 

 those of either of the species mentioned by the relative length of 

 the meropodite : in M, Pearcei this segment is scarcely longer than 

 the carpopodite ; but in M. Bajeri^ as also in M. sociaUs, it is twice 

 as long, and in M. longimanus still longer. 



The figure and description published in Mr. Lee's ' Note-book of 

 an Amateur Geologist ' (pp. 87, 88, pi. cciv.) as that of Mecochirus 

 Pearcei do not apply to that species, but to Meyeria vectensis, Bell. 



Gltphea leptomana, Phil. 



Glyphea Steicklandi, Phil. 



Both these species, mentioned in Mr. Etheridge's edition of 

 Phillip's ' Manual of Geology ' as occurring in the Oxford and 

 Kimmeridge Clays, are omitted, and, I think, judiciously, by Dr. 

 Woodward from his Catalogue of British Possil Crustacea. Of the 

 former species I have not been able to find any figure or description. 

 By the kindness of Professor Prestwich I have examined the 

 specimen of G. StricJdandi in the Oxford Museum, figured by 

 PhiUips. It consists of a didactylous chela, and cannot be referred 



