CEtJSTACEA OF THE MEEd^UI AECHIPELAao. 266 



Lengtli of the last four joints of the second and third legs : — 



Eight leg Eight leg Left leg Left leg 



of the of the of the of the 



2nd pair. Srd pair. 2nd pair. 3rd pair. 



mm. mm. mm. mm. 



Meropodites* 7| 7^ 6§ 6i 



Carpopodites 4|^ 4| 4 4-^ 



Propodites 7 7| 5f 6^ 



Dactylopodites 7 7| 6^- 7^ 



As these dimensions show, the right legs are longer than 

 the left ; the right leg of the third pair is the longest of all, 

 and the left leg of the second pair the shortest. The propo- 

 dites of the two right legs have nearly the same length, those 

 of the two left legs are unequal, the propodite of the left leg of 

 the third pair being a little longer and stronger. Except in the 

 right leg of the second pair, the dactylopodites are slightly 

 longer than the propodites ; the dactylopodite of the right leg of 

 the third pair is the longest, the dactylopodite of the left leg 

 of the second pair the shortest of all ; and the dactylopodites of 

 the right leg of the second pair and of the left leg of the third 

 pair are almost of the same length. 



Genus Cenobita, Lafr. 

 142. Genobita violascens, Seller. 



Cenobita violasceus. Heller, Crustaceen der Novara-Reise, p. 82, Taf. vii. 

 fig. 1. 



Eour specimens were collected. One, inhabiting the shell of a 

 Turbo, is adult, and was found in King Island Bay ; the other 

 three, one of which is in a shell of Ehurna, are from Sullivan 

 Island. 



According to Mr. Miers (' Annals and Magazine of Natural 

 History ' for May 1880, p. 32), this species is probably identical 

 with Gendbita compressa, M.-Edw. I believe he is right. 



Cenobita violascens was discovered in the Nicobar Islands by 

 the 'No vara' Expedition. 



* These joints were measured along their upper margins ; all the dactylo- 

 podites, when seen from above, seem to be shorter than the propodites, because 

 their tips are downwardly curved ; but the real length of their upper margins, 

 the tips included, are given in this Table ; and this length, as a matter of fact, 

 exceeds, in some dactylopodites, the length of the upper margin of the cor- 

 responding propodites. 



