186 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Parasites of Aspidiotus hTerii.* * * § — Dr. P. Lindner found that a 
myrtle shrub growing in a room was infested with lice. On crushing 
a large specimen between a slide and cover-glass, microscopical exami- 
nation revealed the presence of numerous yeast-cells having the general 
characters of Saccharomyces apiculatus. Attempts at cultivation in 
various nutrient media failed ; from this it was inferred that the yeast 
was an obligatory parasite. The blastomycete was present even in the 
eggs. 
In the same lice existed another parasite bearing a general resem- 
blance to a fly maggot, though but 2 mm. long. In a few large specimens 
rudiments of eyes and wing-like processes were observable. In a large 
number of lice were perforations through which the parasites had 
escaped. Occasionally black fly-like insects 2-5 mm. long were found 
on the myrtle, and as their wings were scarcely at all veined and were 
covered with hairs, it seems probable these insects belong to the 
Ichneumon flies. 
Brick-Red Gland in Linmlus.f — Mr. R. W. Tower has a note on the 
external opening of the brick-red gland in Limulus polyphemus, as to 
which different accounts have been given by different writers. The 
present author says, that if the basal portion of the gland be followed 
posteriorly beyond the junction with the lobe from the fifth appendage, 
it is found to attach itself to the posterior interarticular membrane of 
the fifth coxal joint, where it opens to the exterior at the apex of a 
definite well-formed papilla. This papilla is somewhat hidden by the 
folds in the interarticular membrane and is more easily distinguished 
in large adults than in younger specimens. In very young forms a 
strong lens is necessary to detect it. Chemical analyses now being 
carried on indicate that the glands are of an active excretory nature, 
without doubt of renal character. 
e. Crustacea. 
Crustaceans of Malacca, Borneo, Celebes, and the Java Sea.j; — 
Dr. J. G. de Man continues his descriptions of Decapoda and Stomato- 
poda from these regions, dealing in the present instalment with thirty- 
eight species, of which a dozen are new. 
Gills of Cirripedia.§ — M. A. Gruvel notes the variety of structure 
in the mantle-fold which serves as a gill in Cirripedia ; if present it is a 
simple plate in the stalked forms ; it is more complex in the sessile 
forms. In Tetraclita porosa , the species described, there is an even 
greater reduction of the pallial surface and an even more perfect closure 
of the shell than in Balanus ; and it is therefore interesting to find that 
the gill has become adaptively modified. Instead of a single plate, there 
are 8-10, and each is folded irregularly upon itself. The upper end of 
each lamella is supported by a raphe, the lower extremity is fixed to the 
internal wall of the mantle. 
* Centralbl. f. Bakteriol. u. Parasitenk., 2 ta Abt., i. (1895) pp. 782-7 (9 figs.). 
t Zool. Anzeig., xviii. (1895) pp. 471 and 2. 
J Zool. Jahrb. (Abth. Syet.), ix. (1895) pp. 75-218. 
§ Comptes Rendus, cxxii. (1896) pp. 43-4, 
