BULLA. 279 
well washed out, is easily observed ; and from it the yellowish- 
white wrinkled oviduct, also most visible, springs from the 
ovary as a slender thread, but as it proceeds it mcreases 
rapidly in volume, and then as suddenly diminishes, termi- 
nating in the matrix by a fine thread. The matrix and its 
vestibule is a strong, yellow, tough, tubular subcylindrical 
organ, with a transverse constriction denoting the anterior 
chamber ; it is, I think, erroneously marked 4, and called the 
testes in M. Cuvier’s pl. 2. fig. 14. of the memoir. The mis- 
take has arisen from the latter organ lying close, but some- 
what posterior to it, and is very different, bemg of much 
softer, flatter, more even and elongated form ; its colour is pale 
drab. I think the flat, oval, yellow gland near the bladder 
and heart, which Cuvier states to be of unknown use, is an 
appendent to the testis; as I thought I could trace, through 
the transparent membrane, the excretory duct to the posterior 
part of that organ. 
Since the above was written, additional dissections have 
assured us that the organ alluded to above, marked 4, is 
really meant for the testicle. 
The bladder is as large as a small pea, of a pale purplish-red 
mixed colour; it is nearly globular, and les on the left side, 
full of a light pinkish liquid, not acrid but oily, with red- 
brown specks in it; I have seen similar ones in the ova; its 
excretory duct crosses from the left side and certainly enters 
the matrix ; it is doubtless a lubricating or an enveloping fluid 
for the ova; I think it has the latter function; it is never 
flaccid, but always distended: where is the source of the large 
mass of fluid? Its external coat appears to be a network of 
minute vessels, and I presume they are the ducts which distil 
the secretion from the larger veins. The “ organe générateur” 
when not exserted lies doubled up im the cesophageal cavity ; 
it is of trifid form, that is, finger-, spmdle-, and club-shape, 
which latter portion extends to and hes on the gizzard; there 
is no internal connection between it and the testis. Of this 
I am sure, as in consequence of the shape and position of the 
parts, that fact admits of bemg accurately ascertamed. It 
may therefore be considered as almost certain, that the long, 
