140 Records of the Indian Museum. [VoL. V, 1910.] 
A few females purchased in Calcutta on September 14th and al- 
leged to be from Goalundo had eggs of the average diameter of 0°58 
mm. At Monghyr aspent female was obtained on September 23rd. 
In the ovary of this fish were a few large dead eggs which had 
escaped extrusion in the spawning act. These eggs measured 
og mm! (The egg diameter of the American Shad after ex- 
trusion is given as 7; of an inch, approximately 1°8 mm.) The 
egg membrane in all probability expands in contact with water, so 
the egg of Clupea ilisha may approximate in diameter to that of the 
American Shad. 
At Rajmahal a careful search was made along the banks of 
the Ganges for Hilsa fry but none were obtained. The young of 
the following species were identified :—Wallago attu, Mugil corsula, 
Pseudeutropurs garua and Haplochilus melanostigma. 
At Monghyr a quantity of undersized fish was obtained from 
the market and identified. The following species were present :— 
Gobius giuris, Engraulis telara, Barbus sarana, Rohtee cotio, Silundia 
gangetica, Ailia cotla, Wallago attu, Macrones cavasius, Pangasius 
buchanani, Bagarius yarrellit, Macrones aor, Sctenoides pama and 
Clupea chapra, A single specimen of the Hilsa (Clupea tlisha) 6 cm. 
long was obtained. It would appear that the Hilsa spawns in the 
Ganges somewhere above Monghyr and careful investigation 
should be carried on during September and October in suitable 
localities above that place. 
VIII.—-PARENTAL CARE IN SILURIDA. 
During the prosecution of the Bengal Government’s enquiries 
into the fishery resources of the Sunderbuns two instances of 
parental care in Siluridee were met with. On August 22nd shrimp- 
trawling was tried in the Culputtoa River (to the eastward of 
Kaliganj, District of Khulna), and in one of the hauls a specimen ~ 
of Arius jatius was obtained with the young inside the parent’s 
mouth. On examination, this fish, which turned out to be an adult 
male, had four young fish thus sheltering. 
Subsequently when fishing with drift nets off Fraserganj (to 
the eastward of Saugor Island) near the sea face, an interest- 
ing series of the developing eggs of Osteogentosus militaris were 
obtained. ‘These fish, which were also males, were taken on the 
night of November 12th, and my attention was first drawn to 
them owing to their ejecting their eggs when liberated from the 
meshes of the net. Subsequently three individuals were obtained 
with the eggs 7m situ. These eggs, which are of the size of marbles, 
showed a series from the first stages of development to those in 
which the young is well marked off from the yolk. A series has 
been mounted for exhibition in the public galleries of the Museum. 
1 For an account of the growth of the intraovarian ova and the appearance 
of the spent ovary in Teleostei see J. T. Cunningham, ‘‘ On the Histology of the 
Ovary and of the Ovarian Ova in certain Marine Fishes,’’ Quart. Journ. Mic. 
Science, vol. xl, 1897-98, pp. to1—163, pls. 2—4. 
