CRUSTACEA OE THE MEEGUI AECHIPELAGO. 299 



The dactyli of the raptorial limts are armed witli three spines 

 besides the elongated, curved, terminal spine. The appendages 

 of the three posterior thoracic limbs are slender and styliform. 

 The distal prolongation of the base of the uropoda is also dis- 

 tinctive of this species. It terminates in a strong spine armed 

 along the proximal half of its inner margin with five acute 

 spines, and having a spine also on its outer margin inserted 

 about on the middle of its distal half. The distal prolongation 

 of the base of the uropoda may therefore also be described as 

 terminating near its extremity in two spines, of which the inner 

 one is twice as long as the outer. In Pseudosqiiilla Lessonii 

 and P. Cerisii the inner margin presents only two teeth or 

 spines. 



Dimensions : — 



millim. 



Length of the whole animal, from the tip of the rostral 

 plate to the posterior margin of the last postabdo- 



minal segment 50 



Length of the carapace (without the rostrum) .... 9| 

 Length of the rostral plate 3| 



Genus GtONodacttlits, Latr. 



165. GONODACTTLirS GHIEAGEA, Fair. 



Squilla chiragra, Fabricius, Suppl. Entom. p. 417; Desmarest, Conside- 

 rations, Sfc. pi. xliii. 



Gonodactylus chiragra, Latreille, Encyclop. Methodique, x. p. 473, Atlas, 

 pi. cxxv. fig. 2 ; Milne-Edwards, Hist. Nat. Crust, ii. p. 528 ; Miers, Ann. 

 ^ Mag. Nat. Hist. Jan. 1880, p. 40. 



Twelve, mostly small and young, specimens of this common 

 species were collected, eight at Elphinstone Island, one at 

 Owen Island, one in King Island Bay, and two very young 

 individuals at Sullivan Island. 



In one of the specimens from Elphinstone Island the lateral lobes 

 of the rostrum are a little more prominent and somewhat more 

 acute than usual ; and in another specimen from the same locality 

 the two submedian longitudinal prominences of the sixth segment 

 of the postabdomen are grown together, being not spiniferous. 



Gonodactylus chiragra has been recorded from the Mediterra- 

 nean {Milne-Edwards), the whole Indo-Paeific region (Eed Sea, 

 Zanzibar, Natal, Eodriguez, Australia, Philippine and Fiji Islands, 

 Tongatabu), and from the coast of America (Panama). 



