CARCINOLOGICAL STUDIES. 95 



The cephalothorax of the female specimen is exactly as 

 long as the distance between the external orbital angles: 

 in still younger specimens this distance will be larger than 

 the length. 



28. S e s a r m a atrorubens Hess. 



Sesarma atrorubens , Hess, Beitrage zur Kenntniss der Decapoden- 

 Krebse Ost-Australiens, 1865, p. 653. — de Man, in: Zoolog. Jahrb. 

 von J. W. Spengel, Bd. II, 1887, p. 676. 



Two male specimens from the Fiji Islands. 



These individuals are a little larger than the male, of 

 which I have given a description in the » Zoologische 

 Jahrbücher," and the joints of their abdomen are some- 

 what less enlarged in proportion to their length , so that 

 e.g. the posterior margin of the penultimate segment is not 

 yet twice as long as the length of this segment. As may 

 be seen from the dimensions given below, the posterior 

 margin of the cephalothorax of adult males is a little less 

 broad than the breadth of the front, whereas in younger 

 individuals the front is a little less broad than the posterior 

 margin. For the rest the dimensions agree, as to their 

 proportion , with those I have given in the Zoologische Jahr- 

 bücher, 1. c. 



The larger specimen presents the following dimensions: 



Distance between the external orbital angles 32V2 mm. 

 Greatest width of the cephalothorax ... 42 » 

 Length of the cephalothorax, in the middle 37 » 

 Breadth of the front between the eyes . . I6V4 » 

 Breadth of the posterior margin of the cepha- 

 lothorax 15^4 » 



Breadth of the posterior margin of the penul- 

 timate abdominal segment 13V4 » 



Length of this segment 7 » 



Horizontal length of the hand 33 » 



» » » » fingers 2IV2 » 



Height of the hand I8V2 > 



Notes from tlae Leyden üMuseuixL, Vol. JXJLI. 



