66 Moll 
MOLLUSCOIDA. 
POLYZOA. 
Eulers, in the monograph of a new genus {infra) discusses the syste- 
matic position of this class, judging that its nearest alliance is with the 
Gephyreans (Sipunculidce) among the Vermes, and not with the Tunicata 
or Rotifera ; he rejects the order “ Cteno stomata'* as a natural division, 
the Vesiciilaridce being too different from the Ilalcyonellidce and the 
toothed collar an artificial character, which, moreover, is also exhibited 
by Aetea among the Chilostomata, and is nearly obsolete in some Cteno- 
stomata ; the opening, moreover, is not terminal in some Vesiculariidce, 
He proposes to form a chief division of “ Bnjozoa stolonifera,'* comprising 
all those which have two distinct sorts of cells : (1) nutritive, or fully 
developed animals; and (2) others without intestine, producing by 
budding and supporting the former. This group will contain the family 
of the Vesiculariidce and the Pedicellinece {Endoprocta of Nitsche), and 
the author gives a table showing the position of the nutritive cells on 
the others or the stalk in the different genera. Abh. Ges. Gotting. xxi. 
pp. 122-156. 
W. K. Brooks endeavours to point out the homology between 'the 
larval stage of the Mollusca and the Polyzoa ; comparing the velum to 
the lophophore, the foot and pedal ganglion to the epistome with its 
ganglion, the shell with the cell, the operculum with the lid of the 
chilostomatous Polyzoa, etc. P. Bost. Soc. xviii. pp. 233-236. 
W. Repiaciioff has observed the embryology and development of a 
species of Memhranipora, of Lepralia (probably pallasiana) and of 
Tendra zostericola. He comes to the conclusion that the polypid is 
formed only after the fixation of the larva, that it is no separate indi- 
vidual, that its outer layer corresponds to the muscular stratum of other 
animals in the embryonal stage, and that the so-called “ brown bodies” 
[see Zool. Bee. viii. pp. 177 & 178] are remains of the yelk which make 
their way into the interior of the polypid. The periodical destruction 
and new formation of the polypid within the same zooeciura is not with- 
out analogies in other classes of animals, viz., the Crustacea. Z. wiss. 
Zool. xxvi. pp. 139-160, pis. vi.-ix. » 
“ Of Bryozoa there is a great variety in nearly all depths where animals 
have been found. A very striking new form, Naresia cyathus, has been 
found off the coasts of Portugal and Brazils, in 350, 1525, and 1950 
fathoms. In the dredgings near the latter coast the fauna of Bryozoa 
was especially rich.” Willemoes-Suhm, preliminary report on observa- 
tions made on board the “ Challenger,” P. R. Soc. xxiv. p. 572. 
Chilostomata. 
Sticlioporina sp ? on shells of Dreyssena polymorpha and Neritina 
liturata in the Caspian Sea ; Grimm, Kaspinskoe more i ego fauna, i. 
p. 120. 
