"^'iSi!^,i:t" ^MMm in the Uni.

206
CRUSTACEA.
PELTOGASTRIDJ!.
Sylon, Kiroyer, 1855, redescribed. Corpus sacciforme, ovatum, subteres, oute
(palHo) pellucida, sed firma vestitum. Os vel apertura suctoria in organo
adfigendi acetabuliformi, annulo corneo cincto, in latere inferiore corporis
situm, ubi in posteriore parte apertures (genitales) bince parva? circulares
beantes [hiantes], symmetrice posita?, cavitatem intrapallialem aperientes,
adsunt. Genitalia bisexualia: ovarium ramosum in sacco magno maximam
partem cavitatis intrapallialis explente inclusum; testiculus parvus, ovatus, in
posteriore parte ventrali hujus cavitatis situs.—S. hippolytes, Kroyer, on the
underside of the third abdominal segment of Hippolyte securifrons, and S.
pandali, sp. n., on the underside of the first abdominal segment of Pandaltts
brevirostris, at Drobak, near Christiania. M. Sars, Kundsk. Chris. Faun.
pp. 41-48, pi 10. figs. 54-59, 60-63.
Sacculina. A full abstract of GERBE'S paper on the development of the eggs
is to be found, Ann. N. H. (4) v. pp. 140-144. Balbiani, C. R. 1869, December,
and Van Beneden, C. R. 1870, Feb., oppose several of his views. Further,
Balbiani opposes, and Van Beneden maintains, that the polar cellula is detached
from the mature egg, and remains within the ovary, giving origin to
a new egg, and that there is no other second vesicle near the vesicle of Purkinje
in the egg of Saceulina. C. R. 1870, pp. 197-199.