230 PERCY SLADEN TRUST EXPEDITION ' 



Saya de Malha, 55 fms., Sta. C 15 ; 1 $. Amirante, 25 — 80 fras., Sta. E 11 ; 3 $ : 

 39 fms., Sta. E 16 ; 1 <j>. 



Smaller than the type. The claws of the $ are equal and alike, as in the $. 



156. Pilumnus turgidulus, sp. nov. (Plate 19, figs. 1, 2). 



Amirante, 25—80 fms., Sta. E 11; 3 $, 3 ?, (1 $ type): 20—25 fms., Sta. E 13; 1 $: 

 30 fms., Sta. E 21 ; 1 juv. 



$, C. 1. 5-2 mm., C. b. 7 mm. 



A narrow, subquadrate species, the carapace little broader than long, postero-lateral 

 margins nearly parallel, antero-lateral margins short, with 3 small spiniform teeth 

 diminishing in size from first to third, third minute, first tooth remote from orbital angle, 

 which is neither spiniform nor produced. Front strongly deflexed, lobes moderately convex, 

 outer angle inconspicuous. Surface of carapace short-pubescent, with scanty long hairs of 

 which there is a row above the front. Orbital fissures obscure. 



Chelipeds and legs clothed with long soft hairs. Chelipeds unequal in both sexes; in 

 the females and smaller males they are similar, the palm is roughened with low granules. 

 In the well developed males the palm of the large cheliped is almost entirely smooth and 

 naked. Fingers, as a rule, long and slender, narrowly gaping, tips sharp and crossing each 

 other; dark colour confined to the terminal f, except on the prehensile teeth where it 

 extends the whole length of the fingers ; in the old males the larger thumb is swollen at 

 the base, having in the type specimen almost the appearance of malformation. Legs long 

 and narrow. 



This species is very near P. tomiola in the form of carapace and legs ; the latter is, 

 however, wider, lobes of front more prominent and their outer angles more accented ; the 

 fingers are not so regularly tapering, nor the tips so acuminate. 



157. Pilumnus trichophoroides de Man. 



Pilumnus trichophovoides de Man, Zool. Jahrb., Syst., viii. 1895, p. 549; ix. 1897, 

 pi. 13, figs. 8 a— 8 e. 



Egmont, reef; 1 ? adult. C. 1. 9 - 8 mm., C b. 13*5 mm. 



Larger than the type specimen ; antero-lateral teeth less distinctly marked ; the 

 brown colour of the fingers, while restricted to the distal two-fifths on the outer margins 

 of the fingers, runs along the j^rehensile edge as far as the teeth extend. 



158. Pilumnus alcocki Borradaile. 



Pilumnus alcocki Borradaile, in Gardiner, Fauna Maldive Arch., i. 1902, p. 248, 

 text-fig. 48. 



Amirante, 29 fms., Sta. E 1 ; 1 juv. : 29 fms., Sta. E 2 ; 2 juv. : 39 fms., Sta. E 16 ; 

 1 juv. : 30 fms., Sta. E 21 ; 3 $, 1 ?. 



The largest specimen, ?, measures: C. 1. 7'2 mm., C. b. 11 mm. It is more densely 

 covered with long hair than smaller specimens. 



159. Actumnus setifer (de Haan), var. 

 Actumnus setifer Alcock (3), p. 202. 



