CARCINOLOGICAL STUDIES. Ill 



The cephalothorax of the larger specimen has a length 

 of 12 mm.; the anterior part in front of the cervical su- 

 ture is 6 mm. long and 4y. mm. broad, and the anterior 

 margin is 4^/^ mm. broad. The eye-peduncles have a length 

 of 6 mm. , and are as long as the anterior part of the ce- 

 phalothorax. As regards the coloration , our specimens fully 

 agree with Daua's description. 



This species has been recorded from New Ireland (Milne 

 Edwards), Tahiti (Heller) and the Loo Choo Islands (Stimpson). 



36. Calcinus nit id us Heller. 



Calcinus nitidus, Heller, Novara-Reise, 1865, p. 89, PI. VII, fig. 4. 



Three specimens, one from Tahiti,, the two others from 

 an unknown locality. 



This species differs from Calcinus elegcms Milue Edw. 

 especially by the quite different coloration and by the se- 

 cond and third pair of legs being more slender and less 

 hairy. 



Our specimens are all very young and it must perhaps 

 be attributed to their very small size that the fingers of 

 the larger hand are not gaping and that the tubercle on 

 the upper surface of the wrist of the left chelipede is dis- 

 tinctly developed , for I suppose that this tubercle was 

 worn off and therefore less distinct in Heller's adult spe- 

 cimens. As regards the structure of the cephalothorax , the 

 eye-peduncles and antennae , our species agrees very much 

 with Calcinus elegans. The anterior legs are also similar 

 in both species, but the fingers are more finely granulate 

 and gaping in adult specimens. 



The second and third pair of legs are more 

 slender, much less hairy and their dactyl o- 

 podites are considerably shorter than the pro- 

 pod i t e s. 



The cephalothorax, the eye-peduncles and the anterior 

 legs are whitish, and, with the exception of the eye-pedun- 

 cles, marked with a few large spots of a yellowish 



Notes from tlie Leyden Museuxn, Vol. ZSIII. 



