752 . L. A. BORRADAILE. 



Length of single specimen : 9 mm. Colour in spirit : dead white. Differs from all other 

 species in the granular surface of the back. 



One female, taken between tide-marks at Hulule, Male Atoll. 



Tribe Thalassinidea. 



With the exception of a few Axiidae' which hide in weed, and such species as Callia- 

 nassa lignicola, taken from the hollow of a submerged twig, all the members of this tribe are 

 either bun-owers, making galleries, which are often long and deep, in sandy or muddy bottoms, 

 or at least live in burrows made by other animals. Those which burrow between tide-marks 

 usually retire to the bottom of their holes when the tide is out, but they can sometimes 

 be seen just within the opening, when it is almost covered by the water. At such times 

 some at least of them may often be made to seize a bait but ai'e very wary and hard to catch. 

 In spite of certain primitive characters which really remove them from the Nephropsidea, they 

 are at first sight very lobster-like in habit of body, but the abdomen, which is usually softened, 

 the compressed carapace and last pair or more of legs carried close against the sides, and 

 the reduced eyes are easily seen to be consequences of their peculiar mode of life. 



Family Axiidae. Genus Axiopsis Borradaile, 1903. 

 For a definition of this genus see Ann. Mag. Nat. Hist. (7) xii. p. 538. 



1. Axiopsis affinis (de Man), 1887. Arch. Naturges. Lili. i. p. 469. 



A specimen was taken between tide-marks at Hulule, Male Atoll. It was of a purple 

 colour and lived in a purple weed. 



Family Callianassidae. Subfamily Gebiinae. 



Genus Upogebia Leach, 1814. 



2. Upogebia sp. 



A damaged specimen of a Upogebia allied to U. major (de Ha^m), but differing from it 

 in having no row of small teeth on the outside of the hand, was dredged in Mulaku Atoll 

 in 30 fethoms of water. 



Subfamily Callianassinae. Genus Callianidea H. M.-Edw., 1837. 



3. Callianidea typa H. M.-Edw., 1837. H. Nat. Crust. II. p. 320. 

 Taken between tide-marks at Goidu, Goifurfehendu Atoll. 



Genus Callianassa Leach, 1814, 



4. 1 Callianassa (Callichirus) longiventris A. M.-Edw., 1870. (PI. LVIII. fig. 2.) Nouv. 

 Arch. Mas. VI. p. 92. 



' For a key to the families, etc. of the Thalassinidea see Ann. Mug. Nat. Hist. (7) xii. p. 549. 



