136 A. Alcock — Carcinological Fauna of India. [No. 3, 



ii. Fourth (last) pair of legs at least as long as 



either of the first two pair ... ... Pseddodromia. 



Sphserodromia and Conchoecetes, and doubtfully also Pseudodromia, are to be 

 looked upon as distinct genera. But there are undoubtedly forms that are trans- 

 itional between Dromia and Dromidia, Dromia and Cryptodromia, and Cryptodromia 

 and Petalomera, and even between Dromia and Pseudodromia, so that these ought 

 not, in a natural system, to be separated, though for convenience they may stand 

 as subgenera. 



Dromia, Fabr. 



Dromia, Fabricius, Ent. Syst. Suppl. p. 359 : Latreille, Hist. Nat. Crust. &c., V. 

 p. 383, and Nouv. Diet. Hist. Nat. IX. p. 583 : Leach, Malac. Pod. Britt. Text of 

 pi. xxiv A : Eisso, Hist. Nat. Crust. Nice, p. 15, and Hist. Nat. Enrop. Merid. V. p. 32 : 

 Desmarest, Consid. Gen. Crust, p. 136 : Milne Edwards, Hist. Nat. Crust. II. p. 170 : 

 Lamarck, Hist. Nat. Anim. sans Verteb. (2nd ed. 1838) V. p. 480: De Haan, Faun. 

 Japon. Crust, p. 104 : Dana, U. S. Expl. Expd. Crust, pt. I. p. 402 : Stimpson, Proc, 

 Acad. Nat. Sci. Philad. 1858, p. 226 : Henderson, Challenger Anomura, p. 3 : 

 Ortmann in Bronn's Thier-Reich, V. ii. Arthropoda, p. 1155. 



All parts except the tips of the fingers and of the dactyli are, gener- 

 ally, tomentose. 



Carapace not elongate in the adult, strongly convex or subglobose. 



Front cut into three teeth, of which the middle one is on a lower 

 plane than the others and is often so much smaller than them and so 

 much deflexed as to be hardly visible from a dorsal view. 



Palate well delimited from the epistome : efferent branchial channels 

 well defined, but not always bounded by distinct and unbroken ridges. 



The chelipeds may have some of the joints nodose, but the legs are 

 smooth. 



None of tbe legs have the merus dilated. The last two pair of legs 

 are distinctly subcheliform, the spine at the end of the propodite 

 against which the dactylus closes being well developed. 



The sternal grooves of the female do not meet, and they end on the 

 2nd segment of the sternum, between the 2nd pereiopods. 



The branchial formula is as follows : — 



Somites and 



their 

 appendages. 



Podo- 

 branchiae. 



Arthrobranchiae. 



Pleuro- 

 branchigB 







Anterior. 



Posterior. 





VIL ... 



ep. 

















«= 



ep. 



VIII. ... 



1 + ep. 

















= 



1 + ep. 



IX. ... 



ep. 





1 









= 



2 + ep. 



X. ... 



ep. 





1 









= 



2 + ep. 



XL ... 









1 (small) 



1 



ES 



3 



XII. ... 









1 (small) 



1 



= 



3 



XIII. ... 















1 



= 



2 



XIV. ... 

















1 



= 



1 



Total ... 1 + 4 ep. 5 4 4 14 + 4 ep. 



