COPEPODA. 



435 



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1. Sub-order: Eucopepoda. 



Copepoda with swimming feet, the mini of which are two or three 

 jointed. They have biting or piercing and sucking mouth parts. 



1. Gnathostomata. For the most part non-parasitic; oral apparatus 

 adapted for mastication ; fully segmented body. 



Fain. Cyclopidae. Mostly fresh-water animals, without a heart, and with a 

 simple eye. The second pair of antennae are four-jointed and never biramous. 

 The feet of the fifth pair are rudi- 

 mentary in both sexes. The male 

 employs the anterior antennas for 

 prehension. Cyclop* curonntux " 



Ols., ('nthi>i-(imj>tiis HiintttHs Cls., 

 Jlit r/Hti-tiriix cliflifcr 0. Fr. Miill.. 

 North Sea. 



Fam. Calanidse. The anterior 

 antennae are very long, only one 

 of them is modified for prehension. 

 The posterior antennae are bira- 

 mous. Heart always present. The 

 feet of the fifth pair are, in the 

 male, modified to assist in copula- 

 tion. Crfiii-hiliix s/'pTe/t trioHiilix 

 Goods.. Uinptoiniix ritxtur Jur. 

 Irritants Pxterxonii Tempi. 



Fam. Notodelphyidae. Structure 

 of body like that of the Cyclop'uhv. 

 The posterior antenuse modified 

 for attachment. The two last tho- 

 racic segments are fused in the 

 female and form a brood cavity for 

 the reception of the eggs. They 

 live in the branchial cavity of As- 

 oiclians. NotodelpTvys ay His Thor. 



2. Parasita* (Siphonosto- 

 mata). Mouth parts adapted 

 for piercing and sucking, 

 usually with incomplete seg- 

 mentation of the bod}- and 

 reduced abdomen. 



The posterior antennae and 

 maxillipeds end with hooks 

 for attachment. Some of 



Go. 



fir 



FIG. 310. Lcrncea brunch'uilis. a, Male (about 

 2 to 3 mm long). Oc, Eye; G, brain; T, 

 testis ; M, stomach ; F' to -F' v , the four pairs 

 of swimming feet ; Sj>, spermatophore sac. li, 

 Female (5 to 6 mm. long at the time of 

 copulation). A', A", the two pairs of an- 

 teiimv ; D, intestine ; R, proboscis ; Mi-f, 

 maxillipeil. c, Female of Li-rtitea ljf<uii''iiii/.ix 

 after copulation undergoing metam.orph.osiB; 

 (', the same with egg sacs, natural size. 



' Besides Steenstrup and Liitken I.e. compare A.v. Nordmann. " Mikro- 

 graphiscae Beitriige zur Xaturgeschichte der wirbellosen Thiere," Berlin, ls:!2. 

 H. Burmeister, ' Beschreibung einiger neuen und wenig bekannten Schmarot- 



