CARCINOLOG[CAL STUDIES. 97 



I have described , two years ago , a male from the Fiji 

 Islands as a variety »longitarsus^', characterized, besides by 

 comparatively longer dactylopodites , by a few other slight 

 differences regarding the form of the cephalothorax and 

 the relative length of the meropodites of the ambulatory 

 legs. In the two individuals from the Pacific Ocean , quoted 

 above, the dactylopodites of the ambulatory legs are also 

 elongate , as in the male from the Fiji Islands , but 

 the cephalothorax presents quite the same form and the 

 meropodites have almost the same length as in the type. 

 Thus the front is comparatively less broad than in the 

 male from the Fiji Islands and the four postfrontal 

 lobes are less prominent and situated in a rather concave 

 line both in the male and in the female. As in the type, 

 the distance between the epibranchial teeth is again a little 

 larger than the distance between the external orbital angles , 

 whereas in the male from the Fiji Islands the external 

 orbital angles are , on the contrary , a little more distant 

 than the epibranchial teeth. The variety »longitarsus'^ may 

 therefore afterwards prove to be an individual variation. 



The two female specimens from Amboina agree very well 

 with the type. The postfrontal lobes are less prominent 

 than in the male from the Fiji Islands and situated in 

 a very slightly concave line; as regards the epibranchial 

 teeth , they are just as far distant from one another as 

 the external orbital angles. 



III. The third section , in which the lateral margins of 

 the cephalothorax are entire and the hands in the male 

 provided with pectinated ridges, contains at present mW 

 indo-pacific species , which may be characterized as follows : 



A. Inferior margins of the meropodites of tiie ambula- 

 tory legs entire. 



Lateral margins parallel, front exactly 

 half as broad as the distance between 

 tlie extraorbital teeth picta de Haan. 



r»ï'otes from the Leyden IMuseum. Vol. XII. 



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