Miscellaneous. 155 
III. Corophide. 
Amphithoé penicillata, Podocerus longicornis, Cyrtophium glabrum, 
bicuspis, 2. sp. nN. Sp. N. Sp. 
Brusine. Microdeutopus gryllo- Cratippus pusillus. 
Podocerus pulchellus. __ talpa. crassipes, 2. sp. 
monodon, 2. sp. Titii, 2. sp. Corophium longicorne. 
—— Ocius. Cerapus abditus. acherusicum. 
largimanus, 7.sp. Chelura terebrans. 
B. LAXMODIPODA. 
Caprella phasma. Caprella armata, x. sp. Caprella leptonyx, 
acutifrons. monacantha, n. Sp. 
obtusa, 2. sp. n. Sp. aspera, 2. sp. 
Sitzungsber. der Kais. Akad. der Wiss. in Wien, November 4, 1865. 
On a new mode of Parasitism observed in an undescribed Animal. 
By M. Lacazr-DuTHIERs. 
The author detected on the Antipatharian Coral described by him 
under the name of Gerardia some small, flat, reniform bodies, which 
were immersed in the soft tissues of the polypary. On opening some 
of these, he saw escaping from them a swarm of small Crustacean 
embryos. The enclosing capsule proved to be the parent animal. 
M. Lacaze-Duthiers compares this parasite to a small lobster, at 
the utmost 1-2 centimetres (millim.?*) in length, having the thoracic 
portion disproportionately extended and forming a large. flattened sac 
opening only by a pore situated near the middle of its free border. 
The true body of the animal is suspended by its back within this 
greatly developed carapace, which attains a diameter of 3 or 4 centim. 
(millim.?). The body is strongly curved, and the head is very small. 
The abdomen consists of articulated segments, and bears six regular 
and symmetrical pairs of feet ; it contains only a large yellowish diges- 
tive tube, of which the orifices are nearly obliterated. This curious 
Crustacean forms a new genus, to which the author gives the name 
of Laura; the species he denominates L. Gerardia. As it lives within 
the tissues of the Gerardia, M. Lacaze-Duthiers believes that its 
nourishment is obtained by direct absorption from the latter, rather 
than by digestion. 
The walls of the utricular carapace are nearly cartilaginous in tex- 
ture, are pierced by an immense number of pores, from which ex- 
cessively delicate tubes radiate into the surrounding sarcosoma ; and 
through these the fluids of the polypary pass directly into the venous 
lacunee of the parasite. The circulatory apparatus is very rudimen- 
tary, and there are no special organs of respiration. The nervous 
system is also very little developed. 
The reproduction of the animal is equally curious with its mode of 
parasitism. It is hermaphrodite. The female glands occur with 
the liver in the substance of the integuments of the utricle, and open 
* The measurements given by the author seem to be erroneous; they 
would make the body of the animal from 2 to # inch in length, and the 
diameter of the carapace 1! to 12 inch. 
