478 
VERMES. 
Sabella, Sav., Qf. : indica, Sav. j magnijica (Shaw), Qf. j bottcei, Qf. j |?ec- 
toralis, Qf. ; armatUy Qf. j mode stay Qf. ; palmatay Qf. ; vesicidosuy Mont, j tere- 
belloideSy Qf. ; krbyeri, Qf. j arenileguy Qf. ; pavoninay Sav. (penicilhtSy Cuv., 
longobranchiatUy Qf.) j Jlabellatay Sav. j cuculluSy Qf. ; simplex, Qf. ; verticillata, 
Qf. j saxicavay Qf. 
Myxicoluy Koch : modesta, Qf. 
3. Ray Lankkster points out that the bodies considered hy Claparede 
as parasitic Infusoria, which occur in the spermatic receptacles of the limi- 
colous oligochsetous chaetopods, and to which the Swiss naturalist gave the 
name Pachydermoriy are in reality the sperm-ropes or spermatophors of these 
worms. In this paper he figures those of Limnodrilus and Nais j in a paper 
published this year (1871) in the same journal, he figures those of two species 
of TubifeXy and enters minutely into their structure and mode of formation. 
The completely formed spermatophors of Limnodrilus and Tubifex exhibit 
very active movement, like that of a ciliated infusorian, due to the coordinate 
vibration of the filaments of the aggregated spermatozoa. 
4. Lankester describes the cells of the perivisceral fluid of Cheetopodous 
Annelids as examples of cell-migration. He considers that many are de- 
tached from the endothelium of that cavity and then float in the liquid, 
some being given off from the yellow so-called hepatic ” portion covering 
the intestine and dorsal vessel, others from the portion which lines the body- 
wall. He also considers some of the cells in the case of Tubifex and Lum- 
briculus to be migrated muscular-fibre cells ; others, again, he shows are the 
remnants of the generative glands, which appear to undergo a disintegration 
at some seasons after their activity has reached a certain point. 
. 6. Macintosh briefly states the contents of a paper by him as yet unpub- 
lished, in which the anatomy of Tubifex is to be described in detail. He 
considers that the corpuscles of the perivisceral fluid do not arise from the 
yellow glandular cells of the intestine, but are independently originated 
in the fluid. 
0. A species of Nereis parasitic on Jlircinia jlareseens is figured and 
described. 
7. Kent describes a new Sagitta from specimens preserved in spirit, 
obtained from Mr. Moore, of the Liverpool Museum. The new species is dis- 
tinguished by a modification of the so-called “ denticles,” which assume the 
form of three very short setae. Three woodcuts illustrate the paper : ana- 
tomical and histological points are not discussed. 
8. Brandt describes the perivisceral fluid of Sijmnculus as containing red- 
coloured corpuscules, also very strangely ciliated bodies which might be 
mistaken for parasites, and which he names ‘‘Topfcheu.” A special appa- 
ratus for erecting the tentacular crown by means of the perivisceral fluid is 
described. The Tdpfchen are beset with cilia, each of which ends in a little 
knob, and are therefore called by Brandt cili(S capitatce (cilia capitata ?), 
The so-called brown tubes,” which appear to be glandular organs, are also 
provided with these very remarkable cilia. The ovaries and the testes are 
free, and float in the perivisceral fluid. Brandt says they develop from 
original cells floating in the fluid, but does not say whence these latter come. 
He remarks that the ripe spermatozoa are in form like those of vertebrates, 
and are contractile. This is a condition similar to what the Recorder has 
observed in a stage of the development of the spermatozoids of the oligo- 
