DUTCH BORNRO-EXPEDITION. 61 



to dedicate to Dr. A. E. Ortraann of Princeton N. J.,the 

 author of so many important carcinological memoirs, bears 

 such a striking resemblance to Menippe Panope Herbst 

 from Tranquebar that I thought it necessary to send this 

 specimen to Prof. Hilgendorf at Berlin, who kindly com- 

 pared it with the type of Herbst, also a female, and then 

 indicated to me the differences, so that this species, an 

 inhabitant of freshwater, proved to be new to science. 

 The cephalothorax has exactly the same width and length 

 as the type of Menippe Panope^ so that the new species 

 is probably also one of small size and the general shape 

 of the carapace is the same. Prof. Hilgendorf informed 

 me that both species also agree with one another as re- 

 gards the convexity and the outline of the cephalothorax. 

 The greatest width, at the tips of the penultimate antero- 

 lateral teeth, is not yet once and a half as large as the 

 length , measured in the middle. The cephalothorax is 

 strongly convex fore and aft, somewhat less from side 

 to side. Just behind the middle one observes the usual 

 H-shaped figure, that is not formed by furrows as usual, 

 but only by the absence of the minute granules with 

 which the whole surface of the cephalothorax is covered. 

 The regions are inconspicuous, not at all 

 defined, for besides the H-shaped figure only the meso- 

 gastric furrow is to be observed, and even the lateral branches 

 of the cervical groove, the boundary between the gastric 

 and branchial regions, are completely wanting. A little 

 before each anterior extremity of the H-shaped figure, I 

 observed an impressed point, corresponding to the posterior 

 extremity of the protogastric areae. An imaginary line that 

 unites these two points, crosses the lateral margins about 

 in the middle between the tips of the two posterior antero- 

 lateral teeth and the distance between this line and the 

 frontal margin measures almost two thirds of the distance 

 between it and the posterior margin of the cephalothorax. 

 Just as in Menippe Panope., the two epigastric lobes are 

 lying at some distance behind the free border of the front, 



Notes from the Leyclen Museum , "Vol. XXI. 



