562 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
At Port Erin, Eledone frequently appears to make 
unsuccessful attempts to spawn, and in the late summer 
the body swells up greatly and then begins to degenerate, 
causing death. Possibly this may be due to the absence 
of males. 
The large ova of KH. cirrosa are oval, and slightly 
narrower at the tip than at the base, measuring about 
19 x 65 mm. A large amount of yolk is present, in 
fine granules. The only egg envelope, or chorion, is 
transparent and horny, being drawn out into the attaching 
string anteriorly. At this end also it is pierced by the 
fine micropyle. The ovum is surrounded by a clear fluid, 
and the formative protoplasm is aggregated at the anterior 
end, and round the circumference of the egg cell. No 
vitelline membrane is present, the follicular epithelium 
in the ovary secreting the chorion. 
During fertilisation it is probable that the male, as 
in Octopus, deposits the spermatophores by means of the 
hectocotylised arm, in the anterior end of the oviducts. 
When these spermatophores burst, the free spermatozoa 
enter the eggs by means of the micropyle. As Eledone 
has no nidamental glands, the egg is not covered by any 
capsule such as occurs in the case of Sepia, or jelly mass 
as in the egg of Loligo. Since in HL. cirrosa the egg is 
even larger and more yolk-laden than in Sepza, possibly 
the development may be along similar lines. 
No account of the development of /. cirrosa can be 
given, as no lving material was obtained, nor has the 
development of any member of the genus H/edone yet been 
followed out. Drawings of two embryonic stages of 
FE. aldrovandi are shown on Plate I. Figure 3 is that of 
a rather younger embryo than is fig. 4 (after Korschelt), 
and is drawn from some half-developed embryos kindly 
given by Mr. E. S. Russell, of Glasgow University. 
