ZOOLOGICAL RESULTS OF A TOUR IN THE FAR EAST. 
DECAPOD AND STOMATOPOD CRUSTACEA. 
By Stanley K^mp,B.A.,F.A.S.B., 
Superintendent , Zoological Survey of India. 
The collection of Decapoda and Stomatopoda made by Dr. Annandale during his 
recent tour is one of very great interest and I am much indebted to him for the op- 
portunity of examining it. It contains ninety- five species and subspecies all of which 
were obtained in fresh or brackish water. 
The chief value of the collection lies in the precise information it affords regard- 
ing the environment of the different species. lyittle attention has been paid to this 
matter hitherto ; when doubts arise as to the habitat of a particular form, the pub- 
lished accounts generally prove valueless and even where the most exact details of the 
locality are given no reference is as a rule made to the salinity of the water. In 
consequence, the number of forms which have succeeded in establishing themselves 
in fresh water has probably been much under-estimated ; in the collection under con- 
sideration members of no less than twelve genera and subgenera were found living far 
beyond the reach of tidal influence. 
The principal object of Dr. Annandale' s tour was the investigation of the faunas 
of three lakes situated in eastern Asia, — Lake Biwa in Japan, the Tai Hu in the 
Kiangsu province of China, and the Tale Sap on the east coast of Peninsular Siam • 
maps and brief descriptions of these are given in the Introduction to this volume. 
The collection of Crustacea was, however, not restricted to the lakes ; specimens 
were obtained in various parts of Japan, at three localities in China and at a number 
of places in the Malay Peninsula. 
The Japanese collection contains examples of nine species and one subspecies, 
namely : — 
Eriocheir japonicus (de Haan). Leander paucidens (de Haan). 
Sesarma dehaani (Milne- Ed wards). Caridina denticulata (de Haan). 
Helice tridens, de Haan. Paratya compressa (de Haan). 
Potamon {Geotelphusa) dehaani iWhitQ). ,, ,, subsp. im/)roma, Kemp. 
Palaemon nipponensis, de Haan. Acetes japonicus, Kishinouye. 
Helice tridens and Acetes japonicus probably came from water that was slightly 
brackish; all the remainder were found in pure fresh water. The only Decapods 
actually found in I^ake Biwa are the three prawns Leander paucidens , Caridina den- 
ticulata, and Paratya compressa, but the crabs Eriocheir japonicus and Potamon de- 
haani are said to enter the lake at times. 
