ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
341 
and divides the ovum into two very unequal cells ; the second is also 
meridional ; the third equatorial. 
The youngest larva described had a head and trunk segment ; the 
anterior end bore a ciliated cap ; below the mouth lay the first ring of 
cilia, the second was in the middle of the trunk segment. On each side 
of the anus, where paired cirri afterwards develope, there was a tuft of 
stiff tactile hairs, and there were similar hairs here and there on the 
body. The head segment becomes secondarily divided into two, and 
further multiplication of segments proceeds by strobilation from the anal 
segment. 
Prof. E. Korschelt * has studied the same animal, and the two papers 
are found side by side. In many respects there is of course complete 
agreement, but Korschelt’s account is more detailed. 
On the head only two ciliated grooves were seen ; the first two 
segments of the trunk have no parapodia ; the parapodia become smaller 
and have fewer setae towards the hind end ; the terminal segment bears 
two paired cirri and a more ventral, somewhat smaller, unpaired cirrus, 
but numerous variations occur ; the abundant secretion which exudes 
from the very numerous epidermic glands helps the worm to attach 
itself. 
A number of larval stages are described, but an interruption pre- 
vented the investigator from following the development completely. The 
structure and development of the jaw apparatus are described in detail, 
the point of general interest being that the successive stages resemble 
the conditions to be found in various subdivisions of the Eunicidge. 
Like Braem, Korschelt found no nephridia, nor is there a circulatory 
system. 
The association of each ovum with a nutritive cell is corroborated. 
The equatorial plate of the first polar spindle is represented by a single 
tetrapartite chromosome, a condition only known elsewhere in Ascaris 
megalocephala var. univalens. No genital pores were satisfactorily 
observed, though the intactness of the females after laying proves their 
presence. 
Besides males and females, Korschelt found apparent females with 
male cells as well as ovaries, and apparent males with ova as well as 
testes. Hermaphroditism is frequent, and both ova and spermatozoa may 
develope at the same time in the same organ. 
The author also describes the larva Harpoclieeta cingulata g. et sp. n., 
apparently one of the Sylliclege, notable for the occurrence of hooked 
setae, which are rare among Annelids. 
Chloragogen of Ophelia radiata.f — Dr. Th. Schaeppi finds that the 
lymph cells of this Chaetopod arise from the peritoneum which accom- 
panies the branchial veins. Cells with and without rod-like concretions 
have the same origin ; the cliloragogen of the rods always arises around 
the nucleus and is secreted within vacuoles ; the origin of the rod-form 
and the terminal growth of the rods depend on differences of tension in 
the walls of the vacuoles. 
The vascular system of Ophelia is represented, in the abdominal 
* Tom. cit., pp. 224-89 (4 pis., 6 figs.). 
t Jenaische Zeitschr. f. Naturwiss., xxviii. (1894) pp. 247-93 (4 pis.). 
