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between the keel and the ridge is pretty strongly excavated. 

 Below, and somewhat behind the spine of the ridge, there is 

 still another spine whose distance from the border is 3,5 mm. 

 Between the two spines the shell sinks a great deal towards 

 the region round the lower part of the orbit. 



The orbits are large and surrounded by a thickened 

 margin. 



The whole surface of the carapace seems to have been 

 covered by rather widely spaced little oblong, somewhat squami- 

 formed granulations. 



Of the oral organs I have not seen anything preserved. 

 On the other hand one chela (the right one) is present; it is 

 very long and large, and projects far in front of the body. The 

 first segment which is accessible for examination is the upper 

 part of the arm, the length of which is 19 mm., and greatest 

 breadth 10 mm.; its innerside is hidden, the outerside is strongly 

 arched, the lateral margin is here accompanied by a flat furrow. 

 At the top part of the upper arm nearest the back is seen 

 the trace of a short spine, and at its front part is seen a 

 strong spine directed slantingly upwards; about the middle is 

 found another, still stronger spine, directed forwards. 



Of the forearm only insignificant remains are seen ; it also 

 seems to have been provided with strong spines. 



The chela itself is large and compressed, 52 mm. long, 

 its greatest breadth is 20 mm. The outer margin of the hand 

 and the immoveable finger form a gentle curve. The middle part 

 of the hand itself is arched, much stronger on the inside than 

 on the outside. On the latter there is a furrow near the outer 

 margin which broadens in front, and almost occupies the whole 

 breadth of the immoveable finger; towards the tip of the 

 finger it decreases somewhat. Along the outer margin of the 

 hand is a row of small, widely spaced, forwardly directed spines. 

 At the inner margin of the hand a somewhat hollowed part is 



