ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
625 
parts of the egg, and by entirely different methods of segmentation. 
If the four cells are to be regarded as equivalent cells in each of the 
three types, we must conclude that in the egg of Virbius the prospective 
value ot the cells is not at all a function of their position, hut that the 
value of each cell is determined as early as the two-cell stage by some 
process of qualitative division of the nuclei. 
Malayan Decapoda.* * * § — Dr. J. G. de Man continues his description of 
a collection of Decapoda and Stomatopoda from the western coasts of 
Malacca, Borneo, and Celebes, and from the Java Sea. He deals first 
with the genus Itemizes , describing seven previously recorded species 
and B. celseno sp. n. Thereafter he describes species of Eiconaxius, 
Arctus, Palinurus, &c. 
Terrestrial Isopods from Greece.! — Herr G. Budde-Lund reports 
on a collection made by E. von Oertzen in Greece and in Grecian 
islands. The collection included thirty species, of which six were new, 
viz. Armadillo cinctus, A. piger , Armadillidium Oertzenii, A. hybridum , 
Porcellio cibdellus, and Metoponorthus nigrobrunneus. These new forms are 
described and compared with related species. 
Entomostraca of North Wales.j — Mr. D. J. Scourfield, in a pre- 
liminary account of the fresh and brackish water Entomostraca of North 
Wales, records 30 Cladocera, 10 Ostracoda, and 27 Copepoda, of which 
three, Ceriodaplinia pulchella , Alona affinis, and Laophonte Mohammed 
are new to the British fauna. To the detailed list of species are added 
a short comparison with the Entomostracan fauna of the south-east of 
England, the complete records from two typical lakes (Llanberis lakes), 
and some notes on the general character of the Welsh lakes and the 
methods of collecting. 
Entomostraca of the Solway Districts —Prof. G. S. Brady com- 
mences his paper with some interesting observations on the general 
character of the shores of the Solway. In many parts there are muddy 
expanses which are covered with mounds thrown up by innumerable 
lugworms. So closely are these packed that there is rarely a space of 
an inch unattacked by this worm. There can be little doubt that these 
worms, passing through their bodies substances laden with decomposing 
organic matter, which they absorb and assimilate, exert a most powerful 
sanitary influence in purifying what would otherwise become a reeking 
pestiferous swamp. Prof. Brady seems to have found some very inter- 
esting crustaceans. The most interesting are ltunella subsalsa, which 
is a new genus, and Canthocamptus subsalsus sp. n. ltunella is allied 
to, and might also have been included under the genus Cletodes. 
Freshwater Copepods.|| — Dr. 0. Schmeil completes his monograph on 
the free-living freshwater Copepods of Germany. This final part deals 
with Diaptomus (in part), Heterocope, and Eurytemora, and includes the 
bibliography. 
* Zool. Jalirb. Abth. Syst., ix. (1896) pp. 459-514. 
f Arch. f. Naturges., lxii. (1896) pp. 39-48. 
X Joum. Quekett Micr. Club, vi. (1895) pp. 127-143 (1 pi.). 
§ Nat. Hist. Trans. Northumberland, &c., xiii. (1896) pp. 19-33 (3 pis.). 
|| Bibliotheca Zoologica (Leuckart and Chun), Heft 21 (1896) pp. 73-143 
<6 pis.). 
