206 
CRUSTACEA. 
Peltogastridas. 
Sylon, Rroyer, 1865, redescribed. Corpus sacciforme, ovatum, subteres, cute 
(pallio) pellucida, sed firma vestituni. Os vel apertura suctoria in organo 
adfigendi acetabuliformi, annulo corneo cincto, in latere inferiore corporis 
si turn, ubi in posterioro parte aperturce (yenitales) Unce parviB circidares 
beantes [hiantos], symmetrice positas, cavitatem intrapallialem aperientes, 
adsunt. Genitalia bisexualia : ovarium ramosum in sacco magno maxiinam 
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 seciirifrons, and S, 
pandali) sp. n., on the underside of the first abdominal segment of Pandalus 
hrevirostriSf at Drcibak, near Christiania. M. Sars, Kundsk. Chris. Faun, 
pp. 41-48, pi. 10. figs. 64-59, 60-63. 
Saccidina. A full abstract of Gerbe’s paper on the development of the eggs 
is to be found, Ann. N. II. (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 de- 
tached 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 Pur- 
kinje in the egg of Saccidina. C. R. 1870, pp. 197-199. 
