222 PERCY SLADEN TRUST EXPEDITION 



117. Actcea nodxdosa White. 



Actcea nodulosa Alcock (3), p. 148. 



Providence, 50—78 fms., Sta. D 4; 1 $, 1 ?. 



In these specimens all the tubercles are formed of confluent granules. In the $ the 

 brown colour of the immovable finger is extended over the greater part of the palm within 

 and without, only one row of tubercles distant from the wrist. The sternum and abdomen, 

 save the first segment, are not granulate but eroded. 



$, C. 1. 11-8 mm., C. b. 18'8mra. 



?, C. 1. 12-2 mm., C. b. 20 mm. 



118. Actcea flosculata Alcock. 



ActcBa flosculata Alcock (3), p. 151 ; Illus. Zool. Invest., Crust., vii. 1899, pi. 37, 

 fig. 4. 



Amirante, 25—80 fms., Sta. Ell; 1 ? : 20—25 fms., Sta. E 13 ; 1 $, 1 ? : 39 fms., 

 Sta. E 16 ; 1 $. 



119. Actcea polyacaniha (Heller) (Plate 18, figs. 5, 6). 



Chlorodius polyacanthus Heller, S. B. math.-naturw. CI. Akad. Wiss., Wien, xliii. 

 1 Abth., 1861, p. 339, pi. 3, fig. 21. 



Actcea polyacantha Nobili, Ann. Sci. Nat., Zool. (9), iv. 1906, p. 259. 

 Salomon ; 1 % with Bopyrid parasite. Coetivy ; 1 $, 1 ?. 



This species is intermediate between A. peronii Milne Edwards, Alcock (3), p. 150, and 

 A. spinosissima Borradaile [infra). From the former it differs in having the marginal 

 and submarginal projections of the carapace, and all the projections of the chelipeds, stout, 

 pointed spines, instead of rounded, flat-topped tubercles ; the armature of the legs consists 

 entirely of true spines ; the median sinus of the front is narrower and the divisions of the 

 frontal margin are well marked little lobules instead of crenulations. In A. spinosissima, 

 all the spines are slenderer, the front is edged with spines. From both the allied species 

 A. polyacantha is at once distinguished by the short nasogastric region which is not 

 continued forward between the protogastric regions, and is therefore broader than long. 



120. Actcea spinosissima Borradaile. 



Actcea spinosissima Borradaile, in Gardiner, Fauna Maldive Arch., i. part 3, 1902, 

 p. 256, text-fig. 55. 



Cargados Carajos, 28 fms., Sta. B 20 ; 1 juv. $. C. 1. 4'9 mm.; C. b. 6'8 mm. 



On the narrow part of the nasogastric region are 4 petaloid tubercles, instead of two 

 in Borradaile's specimen. 



121. Actcea perspinosa Borradaile. 



Actcea perspinosa Borradaile, in Gardiner, Fauna Maldive Arcb., i. part 3, 1902, 

 p. 257, text-fig. 56. 



Seychelles, 39 fms., Sta. F 3, 1 juv. C. 1. 2-2 mm., C. b. 2-8 mm. 



