194 General Notes. [Feb. 
Zoological Society of London, June 29, a new ectoparasitic Tre- 
matode under the name Sphyranura oslert. In its position it = 
Sibesencdints between ee and Polystomium, and w 
found upon Menobranchus 
Mo ttuscs.—Kobelt ina “ Nachtrag” to his former papers on 
the Molluscan fauna of Nassau ( /ahré. Nassauichen Vereins, Bd. 
39, 1886) reviews, among other molluscs, the Unionidæ of Nassau, 
and describes, besides several varieties, Unio rhenanus, U. kochi, 
and Margaritana Jreytagi as new! Eight plates illustrate the 
paper. 
The rarest of the Cypreeas is possibly Cyprea deckpions: It 
was described by Edgar mith in 1880 from a single worn 
specimen, which until recently was the only one known in any 
collection: It somewhat resembled a young C. ¢hersites, and 
some had oe as to the validity of the species. Recently 
several specimens have been obtained from the pearl-divers of 
Northwestern Aari, and these show conclusively that the 
species is a good one. It is said that the large green turtle feeds 
upon these molluscs 
Usually molluscs are very tolerant of those commensals, the 
oyster-crabs, which make their homes within their valves. At 
a recent meeting of the Zoological Society of London, Henry 
‘Woodward exhibited a specimen of the pearl-oyster (Meleagrina) 
from seks in which a -male Pinnotheres was enclosed in a 
cyst of pearl. 
Bednal, in the Transactions of the Royal Society of South Aus- 
tralia, enumerates five species of Murex and one of Typhis as 
being found on those Mee 
_ Crustacea.—Collett, in a paper on Rudolphi’s rorqual (Ba/e- 
noptera borealis), ecole the presence (Proc. Zool. Soc. London, 
1886) of the parasitic ie oa Balenophilus unisetus, on this 
whale. It is regarded as very rare, and has before been recorded 
but twice, = then on Balenoptera sibbaldu. 
Myrrapops.—Berlese has a monograph of the Italian Iulids in 
the seventesath volume of the Bulletin of the Italian Entomologt- 
octet) 
y. 
According to G. Saint-Remy the brain of Scolopendra is much 
more like that of Hexapods s than like that of either Crustacea or 
ida. 
o < AROSA a recent meeting of the Entomological So- 
- ciety of Washington, Dr. Marx announced the finding of the 
Eur n Epeira diademat i 
é esota. 
At the meeting of the Linnean Society of London, November 18, 
“1886, Mr. A. D. Michael exhibited specimens of the mite Argus 
Ww which | > been received from Australia, and which were z 
ly identical with- the celebrated Argus persicus, the bite a 
ch is said to pre oo and even fatal results. : 
