CETJSTACEA OF THE MEKGUI ARCHIPELAGO. 221 



thickisli line of hairs, originating from the base of the fingers. 

 The fingers are much shorter than the palm, and their pointed 

 tips cross one another ; the mobile finger is a little shorter than 

 the index and somewhat distorted. The ambulatory legs are 

 very short, the oval meropodites are but little longer than broad, 

 and are flattened, smooth, and unarmed. The short carpopoclites 

 and propodites are equally smooth, and the quadri-unguiculated 

 dactylopodites are very short. 



The upper surfaces of the carapace and of the anterior legs are 

 marked with some marginate spots. 



Dimensions of an adult specimen : — 



millim. 

 Length of cephalothorax 10| 



Breadth of same 8 



Length o£ larger chelipede 25 



Length of carpopodite 4| 



Breadth of same , 31 



Length of hand 15 



Breadth of same 4| 



Length of palm 11 



Forcellanapicta was originally found at Hongkong as a parasite 

 on Pennatulce. 



I am unable to determine wherein JPorcellanella triloba, White 

 (Voyage of H.M.S. ' Eattlesnake,' Appendix, p. 394, pi. v. fig. 2), 

 diifers from P. picta. Haswell's short description of the former 

 (Catalogue of the Australian Stalk- and Sessile-eyed Crustacea, 

 p. 149) is wholly applicable to the latter. It is therefore probable 

 that the two forms may prove to be identical, and in that case 

 the name of P. ti^iloba has priority. 



Subgenus Poltoktx, Stimps. 



127. POKCELLAJSTA EUPHEOSTNE, n. Sp. (PI. XV. figS. 1-8.) 



A fine adult female specimen, without eggs, was found by 

 Dr. Anderson, living along with an Annelid in its tube. This 

 new species is doubtless closely allied to Haswell's P. transversa 

 from the eastern Australian coast ; and it is a remarkable fact 

 that this species was also found in the siphons of an Asperqillum, 

 so that the affinity of these two Porcellance is even proved by 

 their similar habits of life. 



This species undoubtedly belongs to Stimpson's subgenus 



