P. T. CLEVE, PLANKTON COLLECTED BY MR. THORILD WULFF. 6(.> 



Mandible, B2 trapezoiclal, twice as long as broad, on the 

 broad side with a row of short bristles. Re 4-jointed, l 1 2 

 as long as the 2-jointed Ri. Re with 6 S, Ri 1 with 1 strong 

 and 3 finer S, Ri 2 with 7 long and 1 short S. — Masticatory 

 apparatus twice as long as the denticulate margin. Exteriör 

 tooth strong, by a gap separate from the other 7 teeth of 

 which the 2nd and 3cl are obtuse and the (ith and 7th bifid. 

 Si short, as long as the last tooth. 



Maxilla. B and R 1 — 3 uniting. Le 1 about twice as 

 long as broad with sparingly plumose, strong S, the distal 

 the strongest and as long as the lobe. Le 2 pyriform with 3 

 Si of which the distal carries long, distant hairs. Li 3 cy- 

 lindrical, with 3 long S. Ri somewhat longer than Re, with 

 3 + 2 + 2 + ;") S. Re with 8 S. 



Maxilliped 1. Proportional length of Bl, B2 and Ri as 10 : 

 o : 2,5. The S strong spinous. 



Maxilliped 2. Proportional length of B 1, B2 and Ri as 

 10 : 12 : 7. B2 about 4 times longer than it is broad. Ll 

 small, L 2 — 4 strong protuberances. Ll with 1 S. L2 with 

 2 spinous S, one somewhat longer than the other which equal s 

 the joint in length. L3 with 3 spinous S, two longer and 

 one shorter. L4 with 3 plumose S of equal length and as 

 ]ong as B2. B2 distally with 5 S; S 1,3 and 5 of equal 

 length and V 3 of the length of the joint, S2 somewhat shorter, 

 all strongly plumose. S4 narrow, short and naked. Ri 

 5-jointed. Ril twice as long as Ri2, with 2 strongly plumose 

 S of equal length and as long as Ril + Ri2. Ri 2 with 3 Si; 

 Ri 3, 4 and 5 with 2 Si. Ri 4 with 1 and Ri 5 with 2 Se. 



Natatory legs, 1 — 4th pairs. Bl of the 2nd and 3d pair 

 with a short plumose Si (no Si was found on the Bl of the 

 lst p.). Re and and Ri of all pairs 3-jointed. Ri scarcely 

 longer than Re 1 + 2. Proportional length of B2, Rel, Re2 

 Re3 and St. 



B2 Rel Re2 Re3 St. 



1 p. . . . 10 18 9 18 25 



2 p. . . .10 13 13 33 33 



3 p. . . .10 10 10 17 20 



4 p. . . .10 10 12,5 25 27,5 



Se of Re of the lst p. 1, 1, 2 of the 2—4 p. 1, 1, 3. Se 1 

 and 2 of the lst p. long and narrow, inserted at a distance 



