1873.] 353 [Morse. 
In connection with the external parietal glands, it is interesting to recall the 
capsulo-genous glands as described by Dr. Lankester1 in the common earth 
worm. He says ‘‘ Besides the regular glands developed on the parietes of the 
body, the earthworm exhibits numerous glands destined tc form the egg capsule, 
in which both zodsperms from the spermatic reservoirs, and ova are deposited, 
These glands were first detected by D’Udekem. . . . The white color, 
and thick fleshy look which is sometimes observed about the exterior of these 
segments, is due to the developement of the capsulo-genous glands. Whether 
the capsulo-genous glands have everything or anything to do with the formation 
of the egg capsule is very difficult to determine; but the supposition of M. 
D’Udekem is so plausible, and comes from so good an authority, that it cannot 
but be received until absolutely disproved.”’ 
Embryology. 
It seems a little remarkable that of the class of Brachiopods, upon 
which so many admirable memoirs have been written, so little should 
still be known about the embryology, or early stages of any of its 
forms. «Yet all that has been done, thus far, toshed any light on 
this portion of their history, points to the unquestionable vermian 
characters of the class. 
The earliest paper on which we find any reference to the embry- 
onic form of the Brachiopod is by Oscar Schmidt, contained in the 
“ Zeitschrift fur ges. Naturwissenschaften,” 1854 p. 325. He gives 
the following figure of the larval form of a species of Terebratula. 
(Fig. 31.) 
Fig. 81. Tn this figure the body shows a deep constriction 
in the centre, the lower end is abrupted truncate, 
as if that were to be the point of attachment. If 
that is the case it would correspond to certain Roti- 
fers which also attach themselves by the posterior 
segment of the body. 
Embryo of a (See Fig. 5 of Rotifer, on page 11, Melicerta 
Brachiopod. : . : 
ringens by Huxley, showing its first attachment by 
the posterior end, the animal at the same time surrounding itself 
with a sand case.) 
Lacaze-Duthiers was the first naturalist to make known several 
stazes of the embryology of a Brachiopod. In a memoir on The- 
cidium? this author gives several figures of the embryos of this 
Brachiopod. ‘The body is composed of four deeply constricted seg- 
1 Journal Microscopical Science. Vol. V, 1865, p. 14. 
2 Annales des Sciences Naturelles, 4th Série, Vol. xv. 
PROCEEDINGS B. S. N. H.— VOL. XV. 23 OCTOBER, 1873. 
