CARCINOLOGICAL STUDIES. 73 



the other margins are obtuse , rounded and unarmed. The 

 upper surface of the wrist is somewhat uneven and presents 

 a very acute spiniform tooth at the internal angle. 



The larger hand is two and a half times as long as 

 high and the fingers are a little shorter than the palm, 

 which is about a third longer than high. The outer surface of 

 the palm is slightly concave above in a longitudinal direction, 

 rather convex in the middle and at the rounded under 

 margin ; the upper margin is rounded. The fingers are 

 slightly compressed and have pointed crossed tips , the 

 upper margin of the dactylus is arcuate , rounded and 

 smooth; the inner margin is armed with ten or twelve 

 teeth , of which the proximal one is somewhat larger than 

 the others. The inner margin of the immobile finger presents 

 nearly the same number of teeth , which also decrease in 

 size towards the tip of the finger. 



The smaller hand resembles the larger, but the fingers 

 are slightly longer than the palm. The anterior legs are 

 smooth and glabrous. 



The ambulatory legs are slender and elongate. The legs 

 of the third and fourth pair are equal in length and 

 longer than those of the two other pairs ; the second pair is 

 the shortest of all. Gerstaecker's description is inexact, 

 when he says that the meropodites of the fourth and fifth 

 legs have almost the same length and that the raeropodite 

 of the third pair is the longest of all. The mero-, carpo- 

 and propodites are strongly compressed laterally ; the slightly 

 arcuate upper margin of the meropodites ends at the distal 

 end in a small sharp tooth. The carpopodites and the 

 propodites of the four pairs of ambulatory legs present, 

 with regard to their length , the same proportions as the 

 meropodites. The very slightly arcuate dactylopodites are 

 compressed laterally and also in the antero-posterior direc- 

 tion , and their upper or outer margin is slightly concave 

 longitudinally. The ambulatory legs are apparently smooth 

 and glabrous. 



Our specimen , like that of Berlin , is of a pale bone- 



JNotes irora the Hjeyden JVLuseuiu, Vol. XII. 



