50 CLEVE, PLÅNKf0^f FROM THE INDIAN OCEAN ANt) THE MALAY ARCHIPELAGO. 



Posterior maxillijjed. B 1 'V* as broad as long; B 2 as long as i> 1 and IV2 as long 

 as broad; Ri 4-jointed. Lobes of B 1 not prominent. L 1 and 2 each with 2 strong, 

 gpinulose Sa and 1 small filiform Sp. L 3 with 1 strong and spinulose, 1 naked (on 

 the anterior margin only hairy) Sa and 2 faint Sp. B 2 with 3 stronger S in the central 

 and 2 finer, long S in the distal part; margin oi B 2 with short stiff and, besides, longer, 

 exceedingly delicate hairs. Ri 1 somewhat longer than the other, which ai-e of equal 

 length and breadth. Ri 1 with 3 distal 8; Ri 2 with 3 distal S; Ri 3 with 2 (?) distal S; 

 Ri 4~5 with 7 S. 



Natatory legs of the 1st pair. B 1 with 1 plumose, short Si. B 2 as long as broad, 

 in the exteriör part with an oblique row of short bristles. Ri reaches somewhat beyond 

 the distal margin of Re 2. Re 3-jointed; Re 1 and 2 of about the same length, together 

 3V2 longer than Re 3. Se 1, O, 2, narrow, not saw-like. St somewhat longer than Re 3, 

 with scarcely denticulate exteriör margin. Si 1, 1, 3; Si o close behind the St. All Si 

 by a joint separated in a proximal and a somewhat longer distal part, the latter of which 

 is plumose or more densely plumose than the proximal part. Ri 3-jointed; Ri 1 and 2 

 somewhat longer than broad; Ri 3 longer than Ri 1 -|- 2, ends in a very small apiculus. 

 Se O, O, 1. Si 1, 1, 5, jointed, plumose in the distal part. 



Natatory legs 2 — 4. B 1 as long as broad with a short plumose Si; B 2 also as 

 long as broad, naked. Re 3-jointed; Re 1 and 2 together somewhat longer than Re 3. 

 Se triangulär, with coarsely denticulate margins. Se 2 of Re 3 being the smallest and 

 closely pressed to the margin of the joint. St of the usual knife-like form, with saw- 

 like exteriör margins (teeth 5 in 0, 01 on the 4th pair). Si 1, 1, 5, by a joint divided 

 in a proximal, scarcely plumose, and a somewhat longer distal, plumose part. Ri 3- 

 jointed. Se O, O, 2; Si 1, 2, G on the 2nd and 3rd pair, but 1, 2, 5 on the 4th pair, 

 all plumose. Margins of Re and Ri hairy. 



i The 5th pair of legs, symmetrical. B \ as long as broad, centrally on the exteriör 



margin with a small nodule. B 2 proximally broader, IV2 times longer than B \; its 

 exteriör margin hairy. Re 1 one and a half times longer than B 2, with a short distal Se, 

 hairy on the exteriör margin. Ri 2~3 short, as long as broad, with 3 S, the largest 

 plumose, as long as V'^ of the leg; the median half as long only, and the third very shoi-t. 

 There are, besides, at the interiör margin some few bristles. 



1>' (),'(!• j'.l' Il'';i0 ■|.:|-r '^-- i r/ !•;_;• I 1,1 -II,-... 



Reticulina Aurivillii N. G., n. sp. 



^■^""""" -" " • . ., (Pl. VII, fig. 3-10). 



Il 



I, 



;: By this name I mean as very stränge copepode, of which I have found one speci- 

 men only. The thick carapace prevented the close examination of all organs, still, it will, 

 no doubt, be easily recognized, for which reason I do not hesitate to describe it, how- 

 ever incomplete and perhaps in some details erroneous the description may be. 



The hody is broad and flat as in Sapphirina, in length 1 mm., in breadth 0,6 mm. 

 The anterior part is 6-jointed. Longitudinal proportion of the joints as 4 : 1 : 1 : 1 : 1 : 2. 

 Cephalis and the thoracic joints are covered with a coarse net-work of chitinous ribs, 

 both on the dorsal ;Mid ventral side. There are no eyes, and the front is truncate. The 



