CARCINOLOGICAL STUDIES. 115 



anterior legs , the high, acute, conical tubercles 

 oi Clib.taeniatus wanting entirely in this species; 

 the palm presents only a few small spinules along the 

 inner margin of its upper surface , but is covered, for the 

 rest, only with some small piliferous lines. The cephalo- 

 thorax , like that of Clih. vulgaris , is never marked with 

 red longitudinal lines , but the chelipedes are striated. The 

 legs of the second and of the third pair present about the same 

 system of coloration in Clih. taeniatus and in Clib. padavensis. 

 The two last-named species , Clih. striolatus Dana and 

 Clih. longitarsus de Haan, are much more hairy than 

 Clih. taeniatus. The anterior part of the cephalothorax of 

 Clih. striolatus in front of the cervical suture , is more 

 quadrate and comparatively shorter than that of Clih. tae- 

 niatus ; the V-shaped groove , which defines the gastric region 

 posteriorly, is a little more distinct and this part of the 

 cephalothorax is slightly more punctate. The hands are 

 covered with smaller and feebler, dentiform tubercles, the 

 colour of which does not strongly contrast with the ground- 

 colour of the hands. The anterior part of the cephalothorax 

 is marked with some symmetrical red spots, but the longi- 

 tudinal lines , proper to Clih. taeniatus are not found. All 

 the legs are marked in both species with longitudinal 

 lines , the anterior as well as the others , but these lines 

 are of a pink colour in Clih. striolatus (in specimens pre- 

 served in spirits) , less numerous and somewhat differently 

 arranged. Thus e. g. the meropodites of the legs of the 

 third pair of Clih. taeniatus are striated on their outer 

 surface , including the two margins , by six red longitudinal 

 lines , four of which run by two and two along the outer sur- 

 face; in Clih. striolatus these meropodites are marked only 

 with three lines, which are widened a little towards the 

 distal end. The outer surface of the carpopodites of these 

 legs presents likewise two pairs of narrow red lines , but 

 in Clih. striolatus only two lines are observed, which are 

 more distant from one another and the lower of which is 

 much broader than the upper one. 



Notes from the Leyden ]Museum, Vol. XII. 



