PUERTO RICAN COPEPODS — GONZALEZ AND BOWMAN 263 



The records of L. coronata by Williams (1906, 1907) from Rhode 

 Island, by Fish (1925) from Woods Hole, Mass., and by King (1950) 

 from off Fort Myers, Fla., probably are all misidentifications : these 

 authors almost undoubtedly had specimens of L. helgolandica. 



Two records of Longipedia from South America are known to us. 

 Carvalho's (1952) L. coronata from the Bay of Santos, Brazil, cannot 

 be identified with certainty since Carvalho's drawings do not show 

 sufficient detail and his description does not include characters useful 

 in distinguishing the species of Longipedia. His figure 45 shows the 

 4 outer setae of Re of P5 to be subequal as in L. coronata, but Re is 

 considerably shorter in relation to its width than in L. coronata. A 

 reexamination of Carvalho's specimens is needed. 



Jakobi (1954) described L. mourei from the Bay of Paranagua, 

 Brazil. It agrees with L. helgolandica in the dorsal margins of the 

 urosome segments being smooth and in having 2 inner setae on Re3 

 of Pi. It differs from all other species of Longipedia in that the 

 female P5 has only 4 setae in addition to the terminal spine. 



Nicholls' (1941) Longipedia coronata may be conspecific with L. 

 helgolandica. The presence of 2 inner setae on Re3 of Pi and the 

 structure of P5 exclude it from L. coronata. The outer pair of lateral 

 spines on the anal operculum are relatively larger than in L. helgo- 

 landica and more like those of L. coronata. NichoUs' specimens were 

 about 1 mm. in length, slightly larger than our specimens of L. helgo- 

 landica but smaller than L. coronata. 



Pesta's (1959) specimen of L. coronata from the Gulf of Naples may 

 be L. helgolandica. The smaU size (0.71 mm.) and the relative lengths 

 of the setae on Re of P5 agree with L. helgolandica rather than with 

 L. coronata. Pesta seems to have based his identification on the 

 presence of 5 rather than 6 setae on Re3 of Pi; however, it is 

 possible that Pesta confused the exopod and endopod of this leg, for 

 his figure 2, labelled "Engl. Exp. PI 9," is actually an illustration of 

 the endopod. Ri3 of Pi has 5 setae in all species of Longipedia. 

 P5 in Pesta's specimen is shaped more like that of L. helgolandica 

 than the narrower P5 of L. minor. 



Family Tachidiidae 



Body elongated. Urosome nearly as broad as or much narrower 

 than prosome. Al 4-9-segmented, usually with plumose setae. Re 

 of A2 1-3-segmented. Re and Ri of Mxl usually reduced. Re of 

 Pi 2-3-segmented, with 1 inner seta on middle segment and 5-6 

 appendages on distal segment. Ri of Pi not prehensile, 2-3-seg- 

 mented, with inner setae on aU segments. Ri of P2 2-3-segmented; 

 Ri of P4 3-segmented. Armature of P1-P4 rather variable. Ri2 of 

 male P2 often produced into pointed process; one seta of distal seg- 



