Crustacea from the China Sea. 79 



a. Carapace armed wholly or principally with 



large spines and spiniform prominences ; 

 meral segments of appendages armed dis- 

 tally with a single spinnle. 



a 1 . Rostral spines less than a third the 

 length of the carapace and widely diver- 

 ging ; legs very lom? hystrix, Miers *. 



b r . Rostral spines considerably more than 

 half the length of the carapace ; legs 

 shorter. 



or. Rostral spines suhparallel, diverging 



only near apex ; intestinal region of 



carapace armed with three spiniform 



projections Robillardi, Miers t. 



i a . Rostral spines diverging gradually 



from the base ; intestinal region of 



carapace armed with only one large 



spiniform projection elegans (Miers) %. 



b. Carapace armed principally with more or 



less close-set, blunt, tuberculiform teeth, 

 amongst which, especially on the branchial 

 region, a few spines may project. 



a 3 . Rostral spines moi'e than half the 



length of the carapace and diverging 



strongly from the base ; meral 



segments of the appendages dis- 



tally spined taunts, sp. n. 



b 3 . Rostral spines less than one third 



the length of the carapace and 



subparallel ; meral segments armed 



distally with a tubercle. 



a 4 . Orbital spine not large ; rostral 

 tooth situated some distance from 

 the apex of rostrum hirta, A. Milne-Ed w.§ 



b*. Orbital spine conspicuous ; ros- 

 tral spine situated close to the 

 apex of rostrum serpulifera, Milne-Edw.|| 



17. Huenia proteus } de Haan. 



Huenia proteus, de Haan, Siebold's ' Fauna Japonica,' Crustacea, p. 95, 

 pi. xxiii. 



A single specimen in 3 feet of water on Eldad Reef. 

 This specimen, although a male, is furnished with those 



* Brachyura of ' Challenger,' p. 60, pi. vi. fig. 4. 



t Proc. Zool. Soc. p. 339, pi. xx. fig. 1 (1882). 



% Brachyura of ' Challenger,' p. 58, pi. vi. fig. 3 (sub Hyastenus). 



§ Ann. Soc. Ent. Fr. (4) v. p. 143, pi. iv. fig. 1. 



|| Hist. nat. Crust, i. p. 313. 



