204 
CRUSTACEA. 
Eurysilenium, gen. nov., Sars, 1. c. pp. 6-11, pi. 9. figs. 16-22. Femina : 
corpus breve, latum, subtrapezoideum, baud segmentatum, antennis pedi- 
busque destitutum. Acetabulum ventrale minutum, tubulosum, Sacculi 
ovigeii duo maximi, non extremitate sed paulo infra earn corpori aflixi. Mas 
iniuutissiinus elongatus, distincte segmeutatus, {icetabulo sat magno tubuloso 
in ventre segmenti primi sito, extremitate corporis posteriore uncinis duobus 
corneis, mobilibus, retro porrectis prasdita, antennis pedibusque nullis. — E. 
truncatum, sp. n., Drobali, near Christiania, on the back or hinder end of 
Eolynoe cirrata. 
Chelonidiformis, gen. nov., Hesse, Ann. Sc. Nat. xi. pp. 275-286, pi. 1. Male 
unknown. Body of the female hemispherical, without articulations ; no eyes ; 
antenna3 simple, nodulous, 6-articulated j head distinct from the trunk j three 
pairs of maxillipeds, the first long, temiinated by sharp points ; mouth small, 
conical, with digitated mandibles, and surrounded by fiat, falciform, pointed 
laminae ; three pairs of thoracic feet, which are two-branched, small, and of 
unequal size, and terminated by sharp points; abdomen prominent, sacciform; 
matrical apertures very large; two oval ovisacs. — Ch. typicus, sp. n., found 
fixed on fragments of Arenicola piscatorum on the [northern ?] coast of France. 
The author proposes for it a new family, with the name Annelidicolee.” 
ANTnEACIIERIDAS. 
M. Sars, Kundsk. Christ. Fauna, pp. 37-41, proposes this new 
family on the following characters : — Body of the females thick, 
divided into distinct segments, which, however, are immobile ; 
feet rudimentary. The animals live parasitically, feeding on the 
blood of other animals, for example. Actiniae, and even fishes, 
but are not affixed to them. The males are not so much smaller 
than the females as in the Lernaeidte. To it belong Staurosoma, 
Will., Antheacheres j Sars, 1856, and Steenst. 1861. 
LERNA£lI)Ai. 
Melirmacheres, gen. nov., M. Sars, 1. c. pp. 11-16, pi. 8. figs. 1-9. Femina : 
corpus oblongum, ventricosum, distincte seymentatum, antennis pedibusque 
destitutum. Acetabulum minutum, breviter tubulosum, sub primo segmento 
(capite) situm. Sacculi duo ovigeri tenues, cylindrici, lougissimi, ovulis bi- 
serialibus. 31as minutissimus, ovalis, ventricosus, segmeutatus, antennis 
superioribtis bene evolutis, articuhitis, setigeris, inferioribus parvis tenuibus 
uniarticulatis, aduncis, pari unico niaxillipeduin vulidorum, pedibus nala- 
toriis nullis. — M. eryasiloidcs, sp. u., Drobak, near Christiania, on the bristle- 
bearing appendices of Melinna (^tSabellides) cristata. This genus is interme- 
diate between the Caligidee and Leruteidoe, or, as the author says, a Lerna3id 
with segmentated body. 
Nereicola ovata, Keferst. This parasite, living on Nereis cultrifcra, Grube, 
is the subject of a paper by W. C. Mackintosh, J. Micr. Sc. (2) no. xxxvii. 
Jan. 1870, pp. 39-41, pi. 5. lie did not know that it was described, but for- 
tunately did not rename it. He also describes the male, before unknown; it 
has two pairs of feet and a caudal fork. 
Peimella orthayoi isci, sp. n., Wright, Ann. N. H. (4) v. p- 44, pi. 1, Cork 
Harbour, on Orthayoriscus mola (L.). 
