Additional species. 



Fam. Ectinosomidae. 



Ectinosoma tenuireme, Scott. 



(Suppl- PI. 52). 



eme, Tli. \ A. S,-,,tt, Revision of the British Copepoda belonging to the gen. -, < 

 / na. I'r.ni-. Linn. Soc. London, 2nd ser. Vol. IV, Part 5, p. 439, PI. 36, 



tijr. :W: I'l. :7. fi- s . 8, 27, 36, 46; PI. 38, figs. 1, 24, 40, 49. 



Characters. Female. Body exceedingly slender, of narrow linear 

 funn. Rostral plate not very prominent, and narrowly rounded at the tip. Uro- 

 -Mine considerably shorter than the anterior division and somewhat tapered distally, 

 la-t Moment very small. Caudal rami scarcely longer than they are broad, and 

 -lighth divergent, apical setae exceedingly slender and elongated, the inner 

 medial one exceeding in length 2 /.-( of the body. Anterior antenn unusually 

 slender and attenuated. 7-articulate, 1st joint much the largest, last joint very 

 Mnall. I 'interior aiiti-nna- with the outer ram us very narrow, 3-articulate, last 

 joint nt-arly t\\i l.-ng as the other 2 combined. Anterior lip with the usual 



ii-v.-d pro]t-ction in front. Mandibles and maxillse of the usual structure. 

 . \nt.iiMi maxillipc.U \<T\ strongly built, with the 2nd basal joint considerably 

 dilati-,1 and full\ twice as hmg as the 1st, terminal claws very slender. Posterior 

 maxillipeds lung and narrow, with the terminal joint fully half as long as tho 

 middle one, Natatory h'gs with the outer ramus much smaller than the inner, 

 ding in length the first 2 joints of that ramus combined. Last pair 

 "f 1.^'-, comparatively small. di>tal joint twice as long as it is broad, with the 

 middl. .ilin^'ly long and slender, almost .'5 times as long as the other 2, 



\hi<h arc snbrjiial in length; inner expansion of proximal joint extending con- 

 -ulcrably ln-\.,n,l the middle of the distal joint, the 2 apical seta? rather unequal. 



iiip.-iratively largo, oblong in form. 

 Colour not yet ascertained. 



of adult female (i.7.'{ mm. 



