P. T. CLEVE, PLANKTON COLLECTED BY MR. THOBILD WULFF. 371 



Systematical notes. 

 Peridinales. 



Steiuiclla' complanata X. sp. Membranaceous, not distinctly 

 tabulated, flat, npper and lower valve on the flat side pro- 

 tracted, somewhat unequal in length. Trans- 

 verse fnrrow distinct. Per val val axis 0,27 

 millim., sagittal axis 0,07 mm. Träns ver se 

 axis 0,015 millim. (Fig. 1). 



Sparingly off Gibraltar and in the Medi- 

 terranean. 



Goniodoma ? bipes X. sp. By this name I 

 denote a form (Fig. 2) of which I have found 

 some few specimens only. The valves are solid 

 and all över coarsely grannlate. The epivalva is 

 slightly convex, the hypovalva ends in two 

 ronnded, apicnlate processes and in 2 smaller S magnif. 

 ones. Pervalval axis 0,08 millim., sagittal and 

 transverse axis 0,07 millim. Hed Sea, Arabian Sea, Malay 

 Archip. (Semau Sonnd). 



Copepoda. 



Ceutropages arabkus X. sp. 



JDiagn. Proximal joints of the anterior antennse not 

 spiniferons. Posterior corner of the 

 last thoracic segment symmetrical, 

 prodnced into spines, parallel to the 

 longitudinal axis of the aniinal. Ri 

 of the 1 — 5 pairs of legs 3-jointed. 

 Serration of St of the legs very 

 fine. 



Female. Si of Ri 1 of the 5 p. of 

 legs plumose. Ri 2 hairy on the 

 interiör side. Re 1 and 2 of the 

 right leg of the oth p. incompletely 

 articulated and with a common 



Anterior 



Fig. 2. a. End of hypovalva. 

 c. d. the cellula in different 



Strong, denticillated Si. auteaui positions. The granulation has 

 antennas reach beyond the fnrca. been represented in the fig. c on 



i -, _ the epivalva onl\ 



Lenght 1,5 mm. 259 t * nif . ^ 



AU figures 



