112 Journal of the Asiatic Society of Bengal. [N.S., XIX, 
forms a groove on the outer side and becomes covered only 
by the slimy skin of the gill opening.’’ Further about the 
body lobe of the kidney Hyrtl says :—*‘ Anteriorly it consists of 
two thick lobes partly separated from one another, each of 
which curves outwardly on the posterior edge of the swim- 
bladder to become attached in a hook-s aped way on the 
upper and outer side of the lateral process of the second 
vertebra and thus extends on the dorsal surface of the fish 
to a point below the skin, where the latter becomes specially 
thickened.”’ yrtl has not mentioned anything about the 
condition of the liver in Arius cous. 
is peculiarity. which is described subsequently in this 
communication, may with a fair amount of certainty be 
ascribed to form a characteristic feature of the two genera 0 
fishes Clarias and Saccobranchus. It may as well be asserted 
that this feature ot the liver and the kidney is also found in 
a few other genera of the sub-family Clarinae, e.g. Plotosus 
(vide Cuv. and Val.) Heterobranchus (vide Weber) and Arius 
(vide ay bao 
I to offer my sincere thanks to Professor D. RB. 
Biaitsharis who helped me a great deal with valuable advice 
and criticisms. The work involved in this investigation has 
been mainly done in the Zoological Laboratory of the Muir 
ae College, Allahabad, under the guidance of Professor 
D. R. Bhattacharya and also partly in the Laboratory of the 
Zoological Survey of India, the Indian Museum, Calcutta, 
under the supervision of Drs. N. Annandale, B. Prashad and 
Ss ora. My sincere thanks are due to them and espe- 
cially to Dr. B. Prashad from whom f received considerable 
aid in looking up most of the literature on the subject. 
Il. Material anp TECHNIQUE. 
The general relationship of the various organs were 
investigated by dissection of a large number of individuals of 
the genera Clarias and Saccobranchus obtained from different 
localities in the United Provinces and in Bengal. I have not 
been able 
Sub-class—Teleostei aaa oe 
O ysostomi 7 
Family Siluridae Family cyprini idae 
1. Wallago Disord 
2. tt . Labeo 
3. Callichro 10. Cirrhina 
4. Aila 11. Catla 
5. Pseudotropius  - 12. Barbus 
