61 
the first pair of legs, but terminated by a pair of curved ridges 
which do meet. Whether by the first pair of legs the chelipeds 
are intended, or the first ambulatory legs, is rather uncertain, 
the obscurity not being elucidated by the figure of the sternum. 
In 1903 Borradaile, in his tabular view of the Dvronuzdae, 
upholds against Alcock the generic distinctness of Stimpson’s 
Dromidia and his own Dromidiopsis, adding two new genera, 
Cryptodromiopsis, in which the sternal sulci end together 
on the cheliped segment, and Dromides, in which they end apart. 
With Platydromia Borradaile was at the time of writing in- 
sufficiently acquainted. He proposes a genealogical tree of 
the family, but speaks of it in conclusion as “‘a good example 
of that kaleidoscopic shuffling of characters which so often 
meets the student of zoological genealogy.” 
Gen. Dromia, Fabricius. 
1798. Dromia, Fabricius, Supplementum Ent. Syst., p. 359. 
1899. Dromia, Alcock, Journ. Asiat. Soc. Bengal, Vol. LXVIIL., 
Pes 2, p10: 
1901. Dromia, Alcock, Catal. Indian Decapod Crustacea, Brach- 
yura primigenia, p. 43. 
1903. Droma, Borradaile, Ann. Nat. Hist., Ser. 7, Vol. XLI., 
p. 298. 
Many other references are supplied by Alcock. The genus 
is defined by Borradaile as follows :— 
‘“ Dromiidae with an epipodite on the cheliped, the walking- 
legs not knobbed or ridged, the carapace broader than long, 
the regions well marked or indistinct, the ridges of the efferent 
branchial channels broken, indistinct or well made, the sternal 
grooves of the female ending apart behind the cheliped seg- 
ment, the fifth leg shorter than the third, and with no thorn 
on the outer side of its last joint.” 
He assigns to it “D. vulgaris, D. dormia (= D. Rumph), 
etc.,” thus leaving in the genus only one of the three Indian 
species included in it by Alcock, but transferring D. cram- 
ovdes, de Man, to Dromidiopsis, and D. umnidentata, Riippell, 
to Dromidia, Stimpson. 
Dromia dormia (Linn.). 
1763. Cancer dormia, Linn. Amoen. Acad., Vol. VI., p. 413. 
1781. Cancer dromia, Fabricius, Species Insectorum, Vol. I., 
p. 501. 
