1899.] A. Alcock — Carcinological hauna of India. 120 



pair to bo a little loTicror than the third pair, and occasionally the fourth 

 pair are as long- as either of the first two pair. 



The abdomen in botli sexes consists of 7 segments, and there is a 

 pair of lateral platelets intercalated between the last two segments. 



The gills are phyllobtanchias and are 14 in number on either sidc.f 



An epipodite of small size is present on the chelipeds but not on 

 any of the legs.f 



The sternal grooves of the female are variable: they may end at 

 the level of the genital openings, or at the bases of the first pair of legs, 

 or at the bases of the chelipeds. 



To this Family the following genera belong : — 



1. *Dromia, Fabr. : seq. 



2. *Dromidia, Stirapson, Proc. Ac. Nat, Sci. Philad. 1858, p. 225 (subgenus of 

 Dromia). 



3. *Cryptodromia, Sfcimpsou : seq. (subgenus of i)ro??iia). 



4. *Petaloinera, Stimpson : seq. (subgenus of Dromia). 



5. *Pseudodi-omia, Stimpson: seq. (? subgenus of Dro?nia). 



6. Eudromia, Henderson, Ciiallenger Anomura, p. 13. 



7. ???Ascidiophilus, Riohters, in Mobius, Meeresf, Maurit. p. 158 (it is very 

 doubtful wliether this form really belongs to the Dromiacea). 



8. *Conohoecetes, Stimpson : seq. 



9. Hypochoncha, Guerin, Rev. et Magasin de Zool. (2) VI. 1854, p. 333. 



10. *Sph9erodromia, Alcock, seq. 



Tribe XL HOMOLIDEA. 



The Homolidea may be divided into two families HomoUdiB and 

 Latreillidm. 



To the Homolidaa belong (1) Somola (with subgenera Homolax and 

 Paromola), (2) Paromolopsis and (3) Hypsophrysy all of which are 

 represented in Indian Seas. 



To the Latreillida3 belong (1) Latreillia and (2) Latreillopsis, both 

 of which are found in Indian Seas. 



I am uncertain of the position of Homologenus A. Milne Edwards, which, but 

 for its singular branchial formula, would be placed with the Homolidse. It may 

 perhaps have to be separated as a distinct subfamily of the Homolidx , The refer- 

 ences to the literature of this genus are : Bull. Mus. Comp. Zool. VIII., 1880, p. 34, 

 (Homolopsis name pre-occupied) : Challenger Anomura, p, 20 : Bull. Soc. Philom., 

 Paris, (8) VIII., 1896, p. 63 : Bronn's Thier Reich V. ii., Arthropoda, p. 1156. 



t Huxley (P. Z. S. 1878, p. 785) gave, as the sum of the branchial formula of 

 Dromia, gills 16 + 1 epipodite. Milne Edwards (Hist. Nat. Crust. II. 172) stated 

 that the gills are 14 in number on either side. I have examined Dromia Ritmphii 

 and D. ciliata, Cryptodromia lateralis, Petalomera granulata and Conchoecetes nrti- 

 jiciosiis, in all of which I find 14 branchi'cB and 4 epipodites on either side : of the 

 epipodites, 3 belong to the maxilHpcds, and oue~a small one — to the chelipeds, 



