96 Dr. A. Philippi's Zoological Notices, 



Amphithbe, some Gammari, and above all Cytherince, and a vast 

 number of Cyclops-like animals, together with Peltidice, and an 

 allied genus. The new genera which I found among them I 

 will now briefly enumerate, reserving a more detailed descrip- 

 tion of them for a longer labour. 



1. Nauplius, mihi (non O. F. Miiller*). (Fig. 12.) 



Corpus elongatum, postice sensim attenuatum, segmento primo s. 

 capite (cum segmento primo thoracis connato) maximo ; cauda 

 bifida, setigera. Antenna quatuor ; superiores multiarticulatse, 

 apice penicillatse ; inferiores tri-?articulatse, apice setis unci- 

 nates, basi seta pectinata munitse. Pes masticatorius ungue in- 

 curvo falcato. Pes primus capiti insertus, desciscens, biramus, 

 ramis elongatis, apice unguiculatis. Pedes natatorii birami sex. 

 Pedes spurii duo, e lamellis duabus basi communi insidentibus 

 formati, sacculum ovorum ex parte obtegentes. 



This genus is abundant in species. It is distinguished from 

 Cyclops; 1. by the varying construction of the first pair of 

 feet which do not serve for swimming ; 2. by the foot-jaw ; 

 3. by the lamella, with cover for the greater part of the ovary. 

 It is remarkable that the foot-jaw and first pair of feet are ex- 

 actly so constructed as in the genus Peltidiumf, which genus 

 I have been able to investigate more completely on a couple 

 of new species than it was possible on P. purpureum. 



2. Laophonte, mihi. (Fig. 13.) 



Omnia ut in Naupliis, sed primum corporis segmentum cum capite 

 non coalitum, ideoque par primum pedum desciscens non capiti 

 sed segmento peculiari thoracis insertum, biramum, ramo altero 

 minimo rudimentario, altero ungue unico maximo terminatum. 



Only one species, but very common ; the back appears ser- 

 rated, from the individual segments being placed sharply from 

 one another. 



3. Psamathe, mihi. (PI. IV. fig. 1.) 



Corpus elongatum, semiteres. Pes masticatorius lamellis duabus 

 terminatus. Pedes sex, birami, natatorii. Pedes spurii duo, 

 biarticulati, angusti. Reliqua ut in Cy elope vel in Nauplio. 



Only one species, rare, elongated as Cyclops, but at the 

 same time flat, thus forming the transition to the scutiform 

 Copepoda. The cibarian apparatus is very peculiar, almost 

 exactly as in the scutiform genus Thyone. Very remarkable 



* O. F. Miiller gave this name to the young state of Cyclops. 

 f For description and figure of this new genus, see Ann. Nat. Hist. vol. iv. 

 p. 303, PI. IV. fig. X2, 13.— Edit. 



