46 CLEVE, PLANKTON FROM THE INDIAN OCEAN AND THE MALAY AUCHIPELAGO. 



posterior part; its greatest breadth near the posterior margin of the Ce; 5-jointed. Ce as 

 long as the other 4 nearly equal joints together. Front truncate (dorsally), bent (laterally) 

 in a right angle, not protracted, blunt. Ahdomen (incl. Th 5) o-jointed, the proportion 

 in length of the joints being 0,83 : 1 : 0,5 : 0,5 : 0,5; Ab 4 slightly shörter than broad. The 

 lateral genital openings of the 2nd joint (genital-segment) in front of the middle, so that 

 the distance of the openings to the anterior and posterior margins of the segment is as 

 1:2. Furca 2V2 tiraes longer than broad; Se somewhat behind the middle, not reaching 

 to the end of the furca; Si arising near the distal margin of the furca, as long as St 4; 

 St 2 the longest of the 4 terminal setas and ^,'3 as long as the abdomen, twice as long 

 as aS^ 4, iVs as long as St 3 and 4 times longer than St\; St 2 and 3 jointed near their 

 bases; all St coarsely plumate. 



Anterior antennen reach to the posterior margin of Tli 2, 12 (13) jointed; longest 

 joints: 13-14, 15~I6, 17-18 and 20-22; joints 7, 10, 14, 18, 22, 23 and 24 Avith 

 long setas; »SY 5. 



Posterior antennen 3-jointed, the longitudinal proportion of the joints 4:1:2. The 

 Si of B in the middle of the margin and proximally directed; Se, 2, dividing the margin 

 in three equal parts. The 2nd joint with 1 proximal and 4 distal S, of which latter 2 

 are coarser and 2 finer. Terminal joint with 5 stronger, in the middle slightly geni- 

 culated S, the longest of which is 5 times longer than the joint, and 1 hne S. 



Afandible. B 2 short and broad; its interiör margin with 1 falcate and plumose S, 

 nearer to the end than the basis of the joint, and 2 falcate spinulose S at the end. Ei 

 small rectangular with .5 S. Re "is as long as the 5 2 is broad, with 5 plumose *S'. 



Masticatory apparatus with about 8 teeth and a short Si. 



Maxilla. Li 1 with 9 stift' S, the proximal of which is plumose, longer and stronger 

 th;m the other. Li 3 with 3 strong S, one of which is spinulose. Between Li 3 and Ri 

 1 >S. Ri very small, rectangular, with 4 very faint S. Re with 4 »S. No Le 1. 



Anterior inaxilliped 5-jointed. L 1 with 1 naked and 2 spinulose S. L 2 witli 1 

 spinulose and straight S. L 3 and 4 each with 3 spinulose S. L 5 more elevate than the 

 other, with 3 strong S, one of which is the largest of all, curved, spinulose and tAvice as 

 long as the two other, naked. — Ri: L Q proximally with one spinulose and, distally, 

 with 3 half as long *S. Terminal joint with 3 strong spinulose, and 2 iiner naked S. 



Posterior maxilliped, 4-jointed. Longitudinal proportion of the joints 18:10:7:1. 

 B 1 with 3 -|- 2 spinulose S. B 2 with about 4 stift" hairs on the proximal part and 2 

 stronger spinulose S at the distal end. Ri with 3 S, the distal of which is spinulose and 

 stronger than the 2 naked proximal. Ri 2 with 4 S, two of which are stronger and spi- 

 nulose, one half as long and naked, one very faint. 



Natalory legs 1 — 4. B 2-jointed, Re and Ri 3-jointed. B 1 broader than long, 

 with one short Si, which on the 1st p. is plumose and longer than on the other. B 2 

 shorter than B 1 with very convex interiör margin. B 2 of the 1st p. with a straight 

 »Se and a shorter Si. Margin bet^veen Re and Ri of the 1st p. Avith a small apiculus. 

 Re of all pairs about twice as long as Ri (still somewhat shorter of the 1st p.). Re 2 

 of all pairs the shortest joint and Re 3 the longest. Re 3 of the 1st p. twice as long 

 as Re 2, of the 2nd and 3rd p. 3 tiines longer than Re 2, of the 4th p. 4 times longer. 



