4 AURIVILLIUS, A NEW GENUS OF HARPACTICIDA. 
anteriores processibus cylindraceis duobus; posteriores validi, 
subeheliformes. Pedes primi paris prehensiles, rami ambo 
triarticulati; pedes secundi paris ramo interno bi-, externo 
triarticulato; tertil et qvarti paris ramo interno uni-, externo 
triarticulato; qvinti paris rudimentarii. Sacculi ovigeri duo. 
LDLarva naupliformis transversaliter ovalis pedum tribus paribus 
non articulatis, brevibus. 
Generic Char. Body almost cylindrical. Anterior antenne 
eight-jointed; posterior two-jointed, with a secondary branch, 
consisting of a single small joint. Mandible palp rudimen- 
tary, reduced to a setiferous tubercle. Maxillary palp undi- 
vided. Anterior foot-jaws having two marginal setiferous 
processes; posterior strong and chelate. First pair of feet 
strongly clawed; both their branches three-jointed ; second pair 
of feet having the inner branch two- and the outer three- 
jointed; third and fourth pairs of feet with the inner branch 
one-, the outer three-jointed; feet of fifth pair rudimentary. 
Ovisaes two. Nauplius transversally oval, with three pairs 
of short appendages, destitute of joints. 
By its mode of living, as well as by its rudimentary 
mandible palp and the one-jointed inner branch of the third 
and fourth pairs of feet, this genus in the adult state is seen 
at the first glance to differ from all the other genera hitherto 
described in the family of Harpacticida, and the larva in its 
first state of development recedes still more widely from all 
larve of Copepoda known at present. At the same time, when 
the question is strictly to determine its place among others, 
it will be found that by the development of the first pair of 
feet into strong, prehensile, elawed membres it differs pro- 
foundly from all genera referable to the subfamilies proposed 
by BozrcK”): Setellina, Porcellidina, Westwoodina, Tachidina, 
Amymonea and Longipedina. It differs also by the number 
of joints in the anterior antenn&e from most of the genera 
belonging to the above-named subfamilies, and from the 
Longipedina moreover by the chelate hand of the posterior 
foot-jaws. There remain therefore only the genera belonging 
to BorcE's subfamilies Harpacticina and ÄAmeirina, but to 
these Balcenophilus hardly is referable, provided the limits 
+) BoECK A.: Oversigt over de vid Norges Kyster iagttagne Copepoder. 
Forhandlinger i Videnskabsselskabet i Christiania. Aar 1864. 
