34 CLEVE, PLANKTON FROM THE INDIAN OCEAN AND THE MALAY ARCHIPELAGO. 



the 2 proximal short, the following 4 geniculated. The longest S IV2 tiraes longer than 

 Be, tinely pliimose. Le with 6 Sa and 1 Sj), pluinose V/2 tiines longer than Be. 



Mandible. B trapezoid witli 4 Si, the proximal coarsely plumose. Be twice as long 

 as broad, indistinctly (on the exteriör side) articulate, with 6 plumose S, IV2 times longer 

 than the mandible. Bi twice as long as broad and less than V2 as long as B, with 2, 2, 

 9 -f- 1 S. — Marticatory aijparatus: the denticulated margin 5/3 of the basal part, with a 

 short Si. Exteriör tooth strong, separated by a gap from the 4 broader and 3 more 

 acute teeth. 



Maxilla. B 1 as long as broad. Le 1 with 9 plumose S, the 2 proximal short, 

 the other very long. Le 2 seems not to be developed. Li 1 rounded, with stiflp *S, some 

 of which are spinulose. Li 2 oblong with 3 strongly plumose S. Le 3 with 4 strong S. 

 B 2 distally with 3 *S'/ and 1 Sp. Be projecting, with rounded outer margin and 11 

 plumose S, reaches to the end of Bi. Bi not articulated, with 3-|- 1, 3-|- 1 and 6 S. 



First maxillipeds twice as long as broad. Articulation indistinct. Lobes digiti- 

 form. L 1 with 5 + 1 Ä, L 2—4 each with 2 + 1 >S. L 5 with 4 (?) S, Ri with 5 + 3 aS. 

 Sp somewhat shorter than Sa, all coarsely plumose, nearly straight. 



Second pair of maxillvpeds. B 1, B 2 and Bi of equal length. B 1 three times longer 

 than broad. L 1 ~ 2 with 'å S, L 2> with 3 /S and L 4 with i.S. The S of each group 

 of different length, the longer plumose. B 2 with 3 5' between the middle and the distal 

 end, where are 2 plumose S. Bi 5-jointed; joints of about equal length. Bi 1 with 3, 

 Bi 2 with 4, Bi 3 and 4 each with 3, Bi 5 with 2 Si. Bi 4 with 1 and Ri 5 with 2 

 plumose Se. 



First pair of natatory legs scarcely more than half as long as the 2nd p. 5 1 as 

 long as broad, with straight exteriör and slightly convex interiör margin, the latter with 

 2 sets of hairs; no Si. B 2 as long as B \, with 1 nearly straight Si, at the base of 

 which is a group of small bristles and aculei. Be twice as long as Bi, 3-jointed. Lie 1 

 and 2 of equal length with groups of hairs on the exteriör margin. Be 3 twice as long 

 as Be 2. Se O, O, 2 and St bristle-like. Si 1, 1,4. Bi 2-jointed, the first joint as long as 

 broad, the second twice as long. Se O, 1; Si I, 4. 



Secoiul to fourth pairs of natatory lec/s. B of the 2nd p. half as long as Be, of 

 the 3'l p. "/s aiid of the 4th p. Va as long as Be. Bi V2 as long as Be (or somewhat 

 longer on the 4th p.). B I of all pairs slightly longer than broad, with 1 ]dumose Si, 

 that rcachcs a little beyond the distai margin of B 2, and with 3 sets of spines, 1 distal 

 and 1 proximal on the interiör side, and 1 group near the basis of Si. B 2 broader 

 than long; no Si, but on tlie 2nd and 3d p. there is a group of 3 small aculei below the 

 inscrtion of Ri. Loiigitudinal proportion of Be 1, 2 and 3 on the 2nd p. = 1 : 1,5 : 3 

 on th(; 3d and 4th = 1:2:4. Se I, 1, 2 on all pairs small, triangulär, with smooth 

 edges. The joints end below the Se in small apiculi. St knife-like, with entire exteriör 

 margin, ' on the 2nd pair slightly shorter thaii Be 3 on the other p. about half as long 

 as Re 3. ^'?' ], 1, 5, plumose. Surface of Re 1 of the 2nd and 3d p. with a row of 

 apiculi below the »SV; surface of Be 2 of the 2nd and 3d p. also with a row of apiculi. 

 Re 3 of the 2nd p carries 1 and of tiie 3d p. 6 small apiculi. Se 1 of Be 8 divides the 

 joints in a proximal and distal part of about equal length. The proximal part has on 



i.x- natirj .uiHim iiii/i/i 



