CYCLOPOIDEA. -[Q45 



postici maris crassi dextro prehensili ac in Pontid. Antennae angulo leviter 

 versus medium flexae, maris articulatione non geniculantes. 



Subfam. 2. OITHONIN^E.— Abdomen praelongum et lineare, cepha- 

 lothorace vix brevius. Oculi inferiores nulli. Maxillae latere 

 interiore subdigitatae. Antennae lmae longae, pauci-articulatae ; 

 dextra maris non geniculans nee angulo flexa. Antennae 2dae 

 apice setigerae, simplices (?). 



Gr. 1. Oithona, Baird* — Maxillipedes pedibus anticis majores, 4-articulati, geni- 

 culate, et prorsum flexi. Pedes postici parvuli. Seta grandis saepe plumosa e 

 basi pedum biremium interdum lateraliter porrecti. 



Subpam. 3. PONTELLIN^E.— Abdomen longitudine mediocre. Oculi 

 superiores saepeque inferiores. Antennae lmae longae ; dextra maris 

 articulatione geniculans (genere Acartia forsan excepto) . Antennae 

 2dae apice setigerae. Pedes postici maris crassi, dextro prehensili. 



1. Oculis superioribus instructi tantum. 



G-. 1. Diaptomus, Westwood.-f — Calano antennis pedibusque affinis, Eamus 

 antennarum 2darum minor 6-7-articulatus, articulo ultimo oblongo, articulis 4 

 ante ultimum medianis perbrevibus. Maxillipedes pedibus anticis vix minores 

 interdum majores. Pedes postici maris crassi, dextro subprehensili ; feminse 

 longi et crassi, precedentibus non similes. Saceulus externus ovigerus unicus. 



Gr. 2. Hemicalanus, Dana. J— Calano antennis pedibusque affinis. Antennse 

 lmae 2daeque ac in Calano. Kamus antennarum 2darum minor sine 4 articulis 

 perbrevibus medianis. Maxillipedes pedibus anticis vix minores vel majores. 

 Pedes postici maris crassi, dextro prehensili ; feminae. sive biremes et preceden- 

 tibus similes sive parvuli. 



Gr. 3. Candaoe, Dana.\\ — Frons quadratus. Antennae lmae recte transversa, 

 antice regulariter et breviter setigerae. Maxillipedes pedibus anticis majores, 



* Baird, Zoologist, 1843; Scribella, Dana, Am. J. Sci. [2], i. 227, and Proc. Amer. 

 Acad. Sci., 1849, ii. 19. 



I J. 0. Westwood, Partington's Cyclop. Nat. Hist., Art. Cyclops, 1836, and Ento- 

 mologist's Text Book, 1838; W. Baird, Brit. Entomost., p. 219; Cyclopsina, Edwards 

 (in part), Crust., iii. 427; Baird, Zoologist, i. 56, and Trans. Berw. Nat. Club, ii. 154; 

 Omethia, Templeton, Trans. Ent. Soc, ii. 118, 1838; Glaucea, Koch, Deutschl. Crust.; 

 Broteas, Loven, Kongl. Yet. Akad. Handl., for 1845, p. 436, pi. 6, and Ofvers. Vet. 

 Acad., Forhandl., 1846, p. 57. Loven's species has the posterior antennae, abdomen, 

 and absence of inferior eyes of Diaptomus ; and the first pair of feet are longer than the 

 maxillipeds. The species B. falcifer is from marshes near Port Natal. The female is 

 represented with a large bag of eggs attached. 



J Cyclopsina, Dana, Proc. Amer. Acad. Sci., 1849, ii. 24. 



|| Amer. J. Sci. [2], i. 1846, 227; Proc. Amer. Acad. Sci., 1849, ii. 22. 



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