REPORT ON THE CRUSTACEA MACRURA. 677 



Dorodotes} n. gen. 



Carapace smooth, laterally compressed and dorsally carinated, anteriorly produced 

 to a rostrum armed with a series of teeth above and below. 



Pleon smooth but slightly compressed laterally ; third somite posteriorly produced 

 on the dorsal surface ; fourth and fifth somites laterally cleft at the posterior margin 

 between the somite and coxal plates. 



Telson long and narrow. 



Ophthalmopod small and uniarticulate. 



First pair of antennae twice the length of the carapace, and furnished with a sharp- 

 pointed stylocerite. 



Second pair of gnathopoda pediform, and furnished with a long basecphysis. 



First pair of pereiopoda simple. Second pair chelate; having a long, slender and 

 flexible, multiarticulate carpos. Three posterior pairs of pereiopoda tolerably robust, 

 having the meros and ischium armed with small spines ; carpos not so long as the 

 propodos ; dactylos styliform. 



Pleopoda biramose and subfoliaceous ; the anterior branch carrying a single stylamblys. 

 Outer branch of the rhipidura furnished with a distinct diaeresis. 



All the pereiopoda except the posterior pair carry a rudimentary mastigobranchia 

 tipped with a little hook. The branchial arrangement differs from that of Pandalus, in 

 having two arthrobranchial plumes attached to the second pair of gnathopoda, as shown 

 in the annexed table: — 



Pleurobranchia?, 

 Arthrobranchiae, 

 Podobranehiae, 

 Mastigobranchia?, 



Observation. — This genus very closely resembles Chlorotocus, A. Milne-Edwards, but 

 differs chiefly in the character of the second pair of pereiopoda, which has the carpos 

 multiarticulate in Dorodotes and biarticulate in Chlorotocus. 



Geogrcqjhiccd Distribution. — I only know of one species of this genus, and this has 

 been taken twice, in the Sea of Banda and near Manila, on the northern shores of the 

 Philippine Islands, where the largest specimen was trawled. 



1 oaoolar/i;, a bestower. 



