28 



podites of the antepenultimate pair of legs. No median 

 apodeme 

 2. The 1st or true basal joint of tlie nntennal peduncle is small 

 and almost immovably embedded. Line.v anomnricie are 

 not present, nor are there any sort of representatives of 

 appendages on the 6th abdominal somite. No appendages 

 on the 1st abdominal somite of the female. The oviducts 

 open on the sternum. A median apodeme is present 

 [Brachyuea vera] : — 



i. The vasa effereniia of the male pierce the coxo- 

 podites of the last pair of thoracic legs : — 



a. Carapace narrowed anteriorly, the front 

 produced to form a distinct rostrum 

 which may be pointed or deeply bifid or 

 trifid : epistome usually long fore-and- 

 aft ... 

 p. The front is truncated and never forms a 

 rostrum: epistome short foie-and-aft ... 

 ii. The vasa efierentia of the male open either on the 

 last segment of the thoracic sternum, or if they 

 perforate the coxopodites of the last pair of 

 thoracic legs, then they pass obliquely forwards in 

 a special groove in the sternum 



Dromides. 



OXTRHTNCHA. 



Cyclometopa. 



Catometopa 



BROMIDES or DROMIACEA. 

 [Dromiacea, De Haan). 



Apterurcs et Homoliens (partim), Milre Edwards, Hist. Nat. Crust. II. 168, 180. 

 Dromiacca, De Haan, Fann. Japon. Crust., p. 102. 



Dromidia vel Anomoura Maiidica Superiora, Dana, V. S. Expl. Exp., Crust, pt. I, p. 4O0. 

 Apterura, Heller, Crust. Sudl. Europ., p. 1-13. 

 Anomoura Dromidea, Miers, Cat. Crust. New Zealand, p. 57. 



Dromiacea, Boas, Reoherohes sur les affinites des Crustacc-s Dccapodes (Vid. Selst Skr., 6 Eaokke, nat. (i;j; 

 math. Afd. I. 2, 1880, p. 202). 



Anomoura Dromidea, Haswell, Cat. Austral. Crust., p. 138. 



Anomura Dromidea, Henderson, Challenger Reports, Zoology, Vol. XXVII., p. 2. 



Dromiac^s, Bouvier, Bull. Soc. Philomath, de Paris, (8) VIll. 189(5, pp. 34-108. 



Drominea, Stebbing, Hist. Crust., p. 133. 



Dromiidea, Ortmann in Bronn's Thier-Reieh, Malacostraca, p. 1153. 



Dromiacea vel Brachyura Primigenia, Alcock, Journ. Asiatic Soc. Bengal, Vo'. LXVIII. pt., 2, 1899, p. 12J. 



Jhomiaceie, Milne Edwards et Bouvier, Crust. Decap. de I'Hirondelle (suppl.jet dela Princesse Alice, Monaco, 

 1899, p. 8, and Exp. Sci. du Travaillenr et du Talisman, Crust. Decapod, pt. 1, p. 5. 



Carapace seldom broader tlian long, often— as also the appendages — pilose. 

 Front narrow. 



Either orbits and antennular pits are wanting, or there are common orbito- 

 antennular pits into which both the eyes and the antennules are retractile. 



The antennal peduncle consists of four separate and freely-movable joints, 

 in the basal one of which the renal tubercle is prominent and conspicuous : tlie 

 antennal flagellum is comparatively long. 



