ANNELIDA. 
625 
ANNELIDA 
BY 
E. Perceval Wright, M.A., M.D., F.L.S. 
Papers published in Journals. 
Baird, W. Remarks on several genera of Annelides belonging 
to the group Eunicea, with a notice of such species as are 
contained in the collection of the British Museum, and a 
description of some others hitherto undescribed. Journ. 
Linn. Soc. Zoology, vol. x. 1869, pp. 341-361. 
. Description of a new species of Earth-worm {Megascolex 
diffringens) found in North Wales. Proc. Zool. Soc. 1869, 
pp. 40-43 (woodcut) . Additional remarks on Megascolex 
diffringens. Ibid. pp. 387-389. 
. Descriptions of some new Suctorial Annelides in the 
collection of the British Museum. Ibid. pp. 310-318. 
Buchholz, R. Zur Entwickelungschichte von Zeitschr. 
f. wissensch. Zoologie, xix. 1869, pp. 95-98, Taf. 4. 
Claparede, Ed. Histologische Untersuchungen iiber den 
Regenwurm {Lumbricus terrestrisy Linn.) . Zeitschr. f. wis- 
sensch. Zoologie, xix. 1869, pp. 562-624, Taf. 43-48. 
Although the labours of many, from Morren to Lankester, 
have taught us much about the anatomy of the Earthworm, still 
its true histological history remains unwritten. This essay of 
Professor Claparede is meant to, in some measure (to use the 
modest words of the author) , help to fill up this very perceptible 
gap, to point out the mistakes and misunderstandings of previous 
writers on the subject, as well as to illustrate the minute struc- 
tures met with, which is done in great detail. 
Claparede, E., and Mecznikow, E. Beitriige zur Kenntniss 
der Entwickelungsgeschichte der Chgetopoden. Zeitschr. f. 
wissensch. Zoologie, xix. 1869, pp. 163-205, Taf. 12-17. 
In treating in detail of the development of many interesting 
Annelids, the authors remark on the breaking down of the arti- 
ficial divisions of Busch, Muller, and even of their own. Thus 
