CARCINOLO(JICAL STUDIES. 55 



are armed at the distal end of the upper margin, with 

 an acute tooth, which is not found in the other species. 

 The ambulatory legs of Heterogr. crenulatus are very 

 hairy, not only along the anterior margin of the mero- 

 podites , but also along the anterior and posterior margins 

 of the following joints. The ambulatory legs of the Japanese 

 species are described by de Haan as glabrous in the male. 

 This is not quite exact. The meropodites are hairy along 

 their anterior margin, but the following joints are clothed , 

 especially along their margins, only with numerous small 

 tufts of very short dark- coloured hairs, the long hairs 

 of Heterogr. crenulatus are entirely wanting. 



Heterogr. penicillatus is marked on the cephalothorax as 

 well as on the legs with small round red spots. 



This species inhabits Japan , and extends until Amoy 

 and Hongkong, Heterogr. crenulatus inhabits the coasts of 

 New Zealand. 



I add the measurements of the two species: 



penicillatus, crenulatus. 



Distance between the ext. orbit, angles I7V4 nam. 15 mm. 



Greatest width of the cephalothorax. 2OV2 » l-ö'^ » 

 Breadth of the anter. marg. of the front 9^/.^ » TVg » 



Length of the cephalothorax . . . ITVg » 17 » 

 Breadth of the posterior margin of 



the cephalothorax 8V4 » 8 » 



These two species differ from Heterogr. crassimanus Dana 

 from the Sandwich Islands, which may be identical with 

 Heterogr. maculatus M. E., by the more hairy legs, espe- 

 cially by the hands which are clothed with hair at the 

 base of the fingers. 



Heterogr. nudus Dana from San Francisco is closely allied 

 to , but may be distinguished from Heterogr. penicillatus by 

 the almost glabrous ambulatory legs , which are less slender 

 and the meropodites of which present no tooth at the distal 

 end of their upper margin. It differs from Heterogr. crenu- 



Notes Irom the Leyden IVIuseum , Vol. XIII. 



