2 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
109 species were enumerated from Madras, Ceylon, and the 
Nicobar Islands, a fifth of which were new to science. Scarcely 
more than a fourth of these 109 species occur in the Mergui 
Collection. The Decapodous and Stomatopodous Crustacea in 
this interesting Mergui Collection that are new to the Fauna 
of the Bay of Bengal prove to be about two thirds of the 
number of species hitherto known as inhabiting it! The species 
therefore of these two groups now ascertained to occur in the 
Bay amount to nearly 300. 
These numbers are eloquent and demonstrate that the col- 
lection made by Prof. Anderson is a most interesting one, and 
a valuable contribution to the Fauna of the north-eastern part 
of the Indian Ocean. 
The following table gives asummary of the number of species, 
of the new species, and of the specimens in the Collection, 
according to the subdivisions of the group :— 
Number of Species. New Species. Specimens. 
Oxyrbynchia: Gs. cs.eesee nee. 9 3 21 
CyclometoOpar s.hce6..s0.sss00 48 5 205 
CWatomietona. c..cssseens-s 20x 47 17 540 
Oxy StOMAtas Gri seoc ses aeeenes 1] 1 26 
PATLOINUE AY eee sels a. aistasioe 26 5 144 
U4 2¥ er wll? ene on ene 19 6 103 
SCOMALOPOUS siness.2 40sec ves >. 4 1 19 
BceclopOU ae ccpiaeen tase ene 2 ae 3 
166 38 1061 
These results show that the subtribe Catometopa contains 
comparatively the largest number of new species, and that more 
than a half of all the specimens belong to it. 
The genera of Catometopa include many groups that are at 
present very insufficiently and unsatisfactorily known: I have 
only to refer to the genera Telphusa, Ocypoda, Sesarma, and 
Gelasimus as instances of the great confusion that still prevails 
regarding these common Indian forms. Only five years ago 
I first pointed out the distinctive characters of the common and 
widely distributed Ocypoda cordimana—a species at that time so 
uunsatisfactorily known that it was almost impossible to dis- 
tinguish it from allied forms, although it had been described 
more than half a century before! 
