ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
125 
Annulata. 
Marine Annulata of the ‘ Caudan ’ Expedition.* * * § — Prof. L. Roule 
reports that fifty species were collected by Prof. Koehler in the Bay of 
Biscay, but nearly a third of them cannot, for various reasons, be deter- 
mined ; this is especially the case with the tubicolar forms. There are 
only five new species, and three new varieties ; the facts of bathymetric 
distribution recall what has been observed in other groups of animals. 
Polychaeta of the Netherlands.-]-— Dr. R. Horst gives a list of forty- 
one species of Chaetopoda (including Sagitta bipunctatd) known to belong 
to the Netherlands. It is interesting to compare it with the British 
list. 
North American Oligochseta.f — Mr. F. Smith has notes on various 
earthworms collected at Havana, 111., by the University of Illinois 
Biological Station. Additional information to that of Ude, whose speci- 
mens were poorly preserved, is given concerning Geodrilus singularis ; 
corrections are made in the account of Diplocardia riparia , first described 
by the author. Thinodrilus is a new genus formed for T. incrustans, 
a Lumbriculid from Quiver Lake. il lesopodrilus asymmetricus is another 
new Lumbriculid from the same lake. 
Oligochaeta of South America.§ — Mr. F. E. Beddard has a report on 
the Naidae, Tubificidse, and Terricolae collected by the Hamburg Expe- 
dition to the Strait of Magellan. The material was in excellent 
condition for microscopic examination, and the author has been able to 
describe a number of new forms. Hesperodrilus is a new genus with four 
new species, and a large number of Acanthodrilus are described ; in all 
seventeen species of that genus are recorded. Microscolex is also well 
represented. 
Lymphocytes of Earthworms.lt — Dr. D. Rosa distinguishes and 
describes four different kinds of lymphocytes in Oligochceta: — (1) In 
Allolobophora rosea ( = A. mucosa ) there are non-amoeboid mucous 
elements; (2) in A. foetida , A. chlorotica, & c., there are non-amoeboid 
oily elements ( eleociti ) ; (3) a third type is distinguished as vacuolar ; 
and (4) thero are the ordinary amoeboid lymphocytes. 
Unpaired Gland of Haementaria.^f — Herr H. Bolsius describes a 
peculiar gland which lies above the proboscis of Hsementaria officinalis , 
a leech which, though without teeth or tooth-plates, seems to be used 
for medicinal purposes in Mexico. The posterior part of the gland is 
delicate and coiled, the middle part is large and straight, the anterior 
part is an efferent canal which bifurcates behind the cerebral ganglia, re- 
unites its branches, and ends on the upper lip. It is peculiar in being 
unpaired. Its lumen seems to be intra-cellular. Its cells are remark- 
* Resultats Scient. de la Campague du ‘ Caudan,’ fasc. iii. (1896) pp. 439-71 
(7 pis.). 
t Tijdschr. Nederland. Dierk. Yer., v. (189G) pp. 15-28. 
j Bull. Illinois State Lab. Nat. Hist., iv. (1895 and 6) pp. 287-97, 396-413 
(4 pis.). 
§ Hamburg, L. Frederichsen & Co., 1896, 8vo (sep. copy), 62 pp. and 1 pi. 
|| Mem. R. Accad. Sci. Torino, xlvi. (1896) pp. 149-78 (1 pi.). 
1 La Cellule, xii. (1897) pp. 101-12 (1 pi.). 
