228 PERCY SLADEN TRUST EXPEDITION 



148. I/ydia tenax (Riippell). 



Ozius (Euruppellia) tenax Alcock (3), p. 187. 

 Coetivy ; 1 $ juv. 



149. Dacryopilumnus eremita Nobili (Plate 16, figs. 6, 7). 

 Dacryopilumnus eremita Nobili, Bull. Mus. Hist. Nat., Paris, 190G, p. 264. 

 Peros, Coin ; 1 adult ?. 



C. 1. 4-2 mm., C. b. 6 "4 mm. 



Tbe $ is a little wider than the $ described by Nobili. Orbits wholly dorsal. The 

 convergent lateral margins are interrupted by the granulate marginal line of the anterior 

 half turning inward on the carapace. Supra-frontal lobes not strongly marked. Area 

 between orbit and frontal margin flat, crossed by a closed fissure. 



Epistomial openings of the efferent branchial channels circular. 



Chelipeds nearly equal, covered with a short, dense pubescence ; the black colour 

 of the dactyl covers only the distal §, the black of the thumb ends with an oblique line 

 where it joins the palm. Ambulatory legs nearly naked, upper and lower surfaces finely 

 denticulate, the largest denticles near the proximal end of the lower margin of the merus 

 of the last pair. 



150. Pilumnus longicornis Hilgendorf. 

 Pilummis longicornis Alcock (3), p. 193. 



Diego Garcia, 14 fins.; 1 ?, 1 juv. Cargados Carajos, 30 fins., Sta. B 9 ; 1 $,- 3 juv.: 

 30 fms., Sta. B 13; 2 $, 1 ?, 2 juv.: 28 fms., Sta. B 19; 2 $, 1 ?, 2 juv.: 28 fms., Sta. B 20; 

 1 juv. Saya de Malha, 55 fms., Sta. C 15 ; 1 $ : 29 fins., Sta. C 19; 1 £. Amirante, 

 20—25 fms., Sta. E 13 ; 1 ? juv. Seychelles, 34 fms., Sta. F 7 ; 1 $, 2 ?, 4 juv. 



Largest specimen (Sta. F 7) ?, C. 1. 14 mm., C. b. 20 mm. 



This species has normally a small spine at the outer angle of the orbit, but it is often 

 broken oft". Usually not more than half the outer surface of the larger palm is granulate 

 and hairy. In the young $ from station E 13, the granules and hairs cover the outer 

 surface of the large palm, and the claw is smaller than is customary, approaching the lesser 

 claw in size as well as ornamentation. 



151. Pilumnus andersoni de Man. 

 Pilummis andersoni Alcock (3), p. 194. 



Cargados Carajos, 30 fms., Sta. B 8; 1 $ ovig. : 30 fms., Sta. B 13; 1 $, 4 juv. : 

 30 fms., Sta. B 14 ; 1 $ : 30 fms., Sta. B 15 ; 4 juv.: 28 fms., Sta. B 19 ; 2 ?. Saya de 

 Malha, 47 fms., Sta. C 12 ; 1 juv.: 55 fms., Sta. C 15; 2 $, 2 ?; one $ of large size, 

 15*7 mm. wide, has the anterior third of the carapace overgrown with a long worm tube 

 and an encrusting bryozoan. Amirante, 29 fms., Sta. El; 6 $, 10 $ : 29 fms., Sta. E 2 ; 

 1 juv.: 25 fms., Sta. E 3 ; 4 $, 7 ?, 6 juv.: 32 fms., Sta. E 5 ; 1 $, 1 ? : 28 fms., Sta. E 6 ; 

 30 $, 38 $ ; an adult $ has the larger claw deformed ; from the base of the thumb, a short, 

 stout spine projects downward ; although almost entirely beyond the line of brown colour 

 on the thumb, this spine is also brown ; its tip is broken off: 34 fins., Sta. E 9 ; 7 $, 4 $. 

 Seychelles, 34 fms., Sta. F 7 ; 1 $: 34 fms., Sta. F 8; 1 $, 3 ?. Praslin, reef; 1 ? ovig. 



