PVN Olho. PROM <rHE BRNGAL FIS H- 
Ee Rei Bio iy: a Bb OIR-AvE OORT Y:,° IT N-D FAN 
MUSEUM. 
No. 2. ON SOME INDIAN PARASITES OF FISH, WITH A NOTE 
ON CARCINOMA IN TROUT. 
Bye SOUTHWELL, A R-C.S.,) F-L.9., £.Z.9., Dy. ‘Director of 
Fisheries, Bengal, Bihar and Orissa, Honorary Assistant, 
Indian Museum. 
(Plates xxvi-xxviii). 
CONTENTS. Page 
(rt) A skin disease found on Rasbora daniconius et CRT 
(2) A parasite encysted in the skin of Cirrhina latia. .. 313 
(3) Cercaria in skin of Nuria danrica. : Pe eawie ft 
(4) Cysts from the skin of Nuria danrica var. grahami See SEs 
(5) Encysted Cercaria in the superficial frnecles of Labeo 
vohita and Catla buchanant 316 
(6) Carcinoma of the thyroid in eanhow trout (Salmo 
ivideus) from Naini Tal .. 317 
(7) Description of a new species of Tsopod Crustacean 
parasitic on the Bhekti (Lates calcarifer) 321 
(8) Argulus foliaceus, Linn., from the skin of Labeo 
roluta Se in ae 323 
(9) Amphilina magna, n. sp., from the coelom of Dia- 
gramma crassispinum 326 
(10) Syndesmobothrium filicolle, Linton, parasitic in the 
flesh of Harpodon nehereus (“‘ Bombay duck”? ) 
from Diamond Harbour .. »+ 329 
(II) Disease in the eye of Holocentrum rubrum Boe £210) 
The following paper deals with a variety of fish diseases, all 
of which are—with two exceptions—caused by parasites. 
The ‘‘lice’’ which live on the skin of Bhekti are not more 
harmful than other lice which live on other animals. The “‘ lice” 
which are described from Rohu are, however, much more danger- 
ous than those found on Bhekti. In rants and confined water- 
areas these parasites may cause great mortality amongst Rohu, 
and every fish in the tank may die. 
The larval Trematodes which live in the skin and flesh of a 
number of fish are of some importance. Heavy infection most 
probably interferes somewhat with normal growth, and it is not 
