552 MK. J. CAKTER ON TBE 



logical and geographical, and Prof. Oppel quotes its occurrence at 

 Malton, Yorkshire. 



Length of carapace 1§ inch ; length of meropodite of first pair 

 1 inch. 



Oxford Clay, St. Ives. 



Coll. Mr. George, ISTorthampton. 



Magila Pichxeei, 0pp. Pal. Mitth. tah. xi. fig. 5. 



Chelae short; length of hand, from carpal to dactylar articulation,, 

 about equal to its width at the distal extremity ; surface with 

 minute, equal, round granules, those on the palmar side having a 

 tendency to assume a definite reticulate arrangement ; a few larger 

 tubercles border the articulation for the dactylopodite ; outer border 

 of hand carinated by a ridge, which bears a few teeth and is con- 

 tinued as a sharp edge along the fixed finger, closely subtended by 

 a series of puncta on the palmar surface. Pingers about as long as 

 the hand, smooth, flat on the palmar, convex on the dorsal side \ 

 inner border of fixed finger gradually widening from apex to base, 

 longitudinally grooved ; a series of small, equal, denticles occur on 

 the dorsal edge of the groove, which is sharply angulated near its 

 distal end, giving the characteristic emarginate appearance to the 

 finger. Dactylopodite nearly identical in character with the fixed 

 finger, but rather longer, and the distal emargination is scarcely 

 so distinctly marked. 



Dr. Oppel has figured this species, but has not described it in 

 detail. 



Length of chela 18 millim. ; width of hand 9 millim. 



Oxford Clay, St. Ives. 



Coll. Mr. George, Northampton ; my own. 



Specimens examined 5. 



Magila levimana, nov. sp. (PL XYI. fig. 7.) 



Chela of first pair — basal portion of propodite (hand) about two 

 thirds as wide as long ; dorsal surface slightl}^ convex, smooth, 

 margins broadly rounded. Fingers about as long as the hand, 

 smooth, slender, oppositely curved, convergent at their tips. A 

 slight angulation on the dentary border of the dactylopodite renders 

 its distal half broadly emarginate. Portions of several segm.ents of 

 the abdomen accompany the chela, and indicate the macrurous 

 form ; the epimera are rounded, deeply punctated, and margined by 

 a distinct ridge. 



The broadly rounded borders of the hand will at once distinguish 

 this species from M. Pichleri, 0pp. 



Length of chela 8 millim. ; width of hand 4 millim. 



Oxford Clay, St. Ives. 



Coll. Mr. George, ^Northampton, 



Specimen examined 1. 



Magila dissimilis, nov. sp. (PI. XVI. fig. 8.) 



Chelae small, delicate, laterally depressed ; propodite (imperfect 



