ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
07 
Echinorhynchus clavula.* * * § — Dr. von Linstow describes with his 
usual careful minuteness Echinornynclius clavula Duj. from Thymallas 
vulgaris , Trutla fario, and other fishes. It is in some details divergent 
from other species. 
Independence of Paternal and Maternal Chromatin in Cleavage- 
Cells.f — Dr. R. Zoja finds that in the dividing ovum of Ascaris megalo- 
cephal-a, the independence of paternal and maternal chromatin is marked 
even more clearly than in the case of Cyclops recently described by 
Rucker t. 
Platy he Iminthe s. 
Stichostemma Eilhardi g, et sp. n.* — Dr. T. H. Montgomery jun. 
describes this new type, as regards certain of its systems. The body- 
epithelium, a high single layer, with ciliated supporting cells, unicellular 
glands of three kinds, and pigmented interstitial cells, is first described. 
Then follows a description of musculature, ht-ad-glaud, aud head-groove. 
The gut is described at greater length, and we may notice that the 
histological uniformity of the median and termiual part of the intestine 
strengthens the view that there is no proctodceum. Most space is given 
to the proboscis ; thus in the wall of the eversible portion no less than 
eleven layers, as McIntosh recognised, are described. The author gives 
various reasons showing that the main stilet is not formed nor replaced 
by an accessory stilet. The two have no gent tic connection, and the 
accessory stilets’ are of little use, and in process of disappearance. Ac- 
cessory stilets must not be confused with reserve stilets. The gonads 
show most resemblance to those of Geonem^rtes australiensis , but Sticho- 
stemma is a protandrous hermaphrodite. 
Nemertines of Port Erin § — Mr. W. J. Beaumont has a report on 
the species of these worms observed at Port Erin in 1S94 and 1895 
21 or perhaps 22 species have been found. jNoue of the parasitic species, 
however, have yet been obtained in the district. The author enumerates 
the forms which have been found, and gives interesting notes on the 
structure and habits of many of them. The rare species, Tetrastemma 
robertianse, hitherto found only by Prof. McIntosh, has been found on 
the shelly ground off Port Erin in about 15 fathoms. 
Turbellaria of Zurich j] — Herr J. Keller has a short note on the 
Turbellaria found in the neighbourhood of Zurich. He has increased 
the number of species from 5 to 24, but of these only one is new, aud 
that is called Stenostoma hystrix. 
Comparative Anatomy of Turbellarians.l — Prof. F. Yejdovsky 
begins with an account of the genus Opistoma O. Schm., describing 
O. Schultzeanum. A second chapter is devoted to the reproductive 
organs of Derostomeae, with particular reference to Derostoma unipunc- 
lafum aut., D. gracilis sp. n., D. anophthalmum sp. n., 1 >. typhlops Vcjd. 
* Arch. f. Naiurgesch , lxi. (1895) pp. 145-58 (1 ph). 
t Anat. Anzeig., xi. (1895) pp. 289-93 (3 figs.). 
X Zeitschr. f. wiss. Zool., lix. (1895) pp. 83-146 (2 pis.). 
§ Proc. and Trans. Liverpool Biol. Soc., ix. (1895) pp. 354-73. 
|| Rev. Suis. Zool., iii. (1895) pp. 295-7. 
1 Zeitschr. f. wiss. Zool., lx. (1895) pp. 90-162 (4 pis. and 4 figs.); 163-214 
(3 pis. and 1 fig.). 
