24 PROCEEDINGS OF THE AMERICAN ACADEMY 



giores, a basi arcuatas ; articulis 13, 14, 15, 16, 17 antennse dextrae in- 

 crassulatis, articulo 17 elongato apice prominulo, partim subtilissime 

 pectinate, sequentibus sex brevibus, et tenuissimis. 



Long. -ry. — Hah. in mari Pacifico prope " Valparaiso." — Lect. 

 die 10 Ap., 1839. 



5. Candace aucta. — Femince. : Cephalothorax 5 - 6-articulatus, 

 postice subacutus aut obtusus. Antennse anticse fere corporis longitu- 

 dine, e basi arcuatee, apice prorsum parce flexse, articulo secundo longo 

 et crasso. Abdomen 2 - 3-articulatum. 



Long. tJj". — Hab. in mari Pacifico, lat. aust. 9°, long. occ. 174° ; 

 etiam prope insulas " Kingsmill " ; quoque in mari " Sulu." — Lect. 

 die 26 Jan., 1841 ; die 14 Ap., 1841 ; Dec, 1841 ; die 28 Jan., 1842. 



6. Candace truncata. — Femince. : Cephalothorax postice trunca- 

 tus. Antennse anticte corporis longitudine, prope articulum. sextum 

 flexse, deinde recte transversse et tenuissimse ; articulo secundo crasso, 

 non longiore quam articulus tertius quartusve. 



Long. ^y. — Hab. in mari Pacifico, prope insulas " Samoa " et 

 " Kingsmill," et in mari " Sulu." — Lect. die 25 Mar., et die 1 Ap., 

 1841 ; die 2 Feb., 1842. 



Genus VI. CYCLOPSINA. {MUne Edwards.) 

 Rostrum furcatum. Antenna anticcB sive rectse, sive leviter curvatae, 

 maris dextra articulatione geniculante. Maxillipedes (ct. vi.) pedi- 

 bus proximis majores, non geniculati, setis longis spinulosis instructi. 

 Oculi inferiores nulli. Cephalothorax 4-7 articulatus, capite soepe 

 discrete. Antennce fosticce. iisdem Calani similes. Pes posticus 

 dexter maris grandis et prehensilis. [Maxillipedes, et maris anten- 

 nam anticam dextram pedemque posticum dextrum, PontellcB afiinis ; 

 antennam posticam, oculos, et habitum, Calano similis. Si oculi in- 

 feriores adsunt, species Pontellm pertinent.] 



Syn. — Cyclopsina (C. castor), Milne Edwards. — Cetochilus? Roussel 

 de Vauzkme. — Monoculus (M. Castor), Jurine. — Cyclops (C. castor), 

 Desmarest. — Dioptomus (D. castor), Westivood. — Non Cyclopsina 

 Bairdii. 



1. Cyclopsina longicornis. — Frons rotundata. Ceplialothorax 

 postice obtusus, 5-articulatus, articulis posticis acquis. Antenna3 anticas 

 sesqui corporis longitudine, rectiusculas, setis brevibus, duabus subapi- 

 calibus posticis prselongis, subaequis, apicalibus perbrevibus, antica pe- 

 nultima articuli longitudine. Styli caudales breves. 



