1905.] 



FROM CHRISTMAS ISLAND. 



549 



legs are unfortunately wanting) ; and likewise a female 50 mm. 

 long with the female from Chiistmas Island. 



In a paper on some species of this genus (in the Transactions 

 of the Linnean Society of London, 2nd ser. Zool. vol. ix. pt. 8, 

 1904, p. 292), I have already alluded to the fact that in adult 

 specimens of Pal. lav Fabr. from Tahiti, described by me as a 

 vai'iety S2)ectabilis, the ambulatory legs presented a sioiUer shape 

 than in specimens of the same size from Halmahera ; but I do not 

 venture to say now whether the Prawns from Christmas Island 

 belong to that variety or not, because they ai-e considerably 

 younger. 



Measurements in millimetres. 



1. 



J. 



3. 



Length of the body 



Formula of the rostrum 



Length of the carpus of 1st pair of legs 



„ ,, chela „ „ 



„ „ larger leg of the 2ucl pah- 



,, „ merus 



Breadth of the merus pro?iimally 



„ ,, „ distally 



Length of the carpus 



Breadth of the carpus proximallj^ 



„ „ „ distally 



Length of the chela 



„ „ palm 



Breadth „ ,, in the middle 



Thickness „ „ ,, 



Length of the shorter leg of the 2nd pair 



„ „ merus 



Breadth ,, „ proximally 



„ „ „ distally 



Length of the carpns 



Breadth „ „ proximally 



distally .' 



Length of the chela 



„ „ palm 



Breadth „ „ in the middle 



Thickness ,, „ „ 



Length of the meropodite * of the 3rd pair of legs 

 Breadth „ ,, ,, ,, „ 



Length „ propodite „ „ „ 



Breadth „ „ „ „ „ 



Length „ dactylopodite „ „ „ 



62 



8 



3 



7-5 



4-25 



49 

 9-5 

 1-5 

 2-5 

 8-25 

 1-0 

 3-25 



21 



12 

 3-75 

 3-25 



45-5 

 9 



1-5 

 2'4 

 7-5 

 1-5 

 2-9 



18-5 



10-25 

 2-75 

 2-4 

 7-5 

 1-33 

 6-4 

 0-78 

 2-3 



43 

 9 

 3 

 5-3 

 3 



25-5 

 5-25 

 0-5 

 0'9 

 4-9 

 0-7 

 1-25 

 9-2 

 5 



1-3 

 1-16 



24-5 

 5 



0-5 

 0-9 

 4-4 

 0-65 

 1-2 

 8-65 

 4-5 

 1-3 

 11 

 5-2 

 0-72 

 4-7 

 0-38 

 1-4 



75 



7 



2 



9-3 



4-5 



49 



10-5 

 1-2 

 1-7 

 9-5 

 1-25 

 1-9 



18-5 



10 

 2-2 

 2 



9-2 

 1-3 



7-7 



065 



2-9 



43 

 9 

 3 

 5 



2-8 

 26-5 

 5-5 

 0-6 

 0-9 

 5-7 

 0-65 

 1-2 

 8-8 

 4-75 

 1-25 

 1-1 

 24 

 5-25 

 0-6 

 0-9 

 5 



0-7 

 1-12 

 8-75 

 4-75 

 1-2 

 11 

 5-2 

 0-62 

 4-2 

 0-35 



Nos. 1, 2, Christmas Island ; No. 3, male from the River Palopo; 

 No. 4, female from Kadjang, Celebes. 



In another recent paper on species of this genus (in ' Notes from 

 the Leyden Museum,' vol. xxvi. 1905, p. 204, pi. 15. figs. 1-4) 

 I have proved that Pal. reuniannensis HofFm., from the Island of 



* The joints of the ambulatory legs are measured, their length along their upper 

 border, the breadth just in the middle. 



