KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 35. N:0 5. 51 



posterior part is small, soft and enclosed between the lobes of the last segment of the 

 anterior part. There is no distinct articulation of the posterior part, with exception of 

 the furca. The branches of the furca are twice as long as broad. Each branch of the 

 fnrca carries, on the exteriör margin, a not plumose bristle, ^/a as long as the body and 

 at its basis 3 short small S- 



Antennce of the jirst pair are short, similar to those of Sapphirina and 5-jointed. 



Antennce of the second pair were only obscurely seen through the thick carapace. 

 They seem to resemble those of Lubbockia. 



Of the mandible the masticatory apparatns only was visible through the carapace. 

 I counted 7 well developed teeth. 



Anterior (?) maxilliped (as seen thi^ough the carapace) was remarkable for the 

 hairy lobe on the distal end of the basal part. 



Posterior (?) maxilliped was of the same type as in Corycceus, Onccea, Sapphirina. 



Legs of the 1st pair are very dissimilar to the other. They are robust and 

 strengthened by strings of chitine both on the basal part and on the proximal joint of Ke and 

 Ri. The outer and inner branch are 2-jointed; the exteriör is inserted more pi'oximally 

 on the B and besides shorter. There is sorae distant resemblance to the lirst pair of 

 Idya, Macliairopus and Scutellidium. 



The natatory legs of the 2nd to 4th pairs are adapted for swimraing. The interiör 

 branch of at least the 3rd and 4th pairs are 3-jointed. Ee is 3-jointed; Se 1, 1, 3, 

 narrow, spine-like, but with denticulate edges; Si plumose, on the second pair 1, 1, 3, 

 on the 3rd and 4th 1, 1, 4. Ei is only a little shorter than Ee, its Se O, O, 1 (the 

 2nd pair not examined) and Si 1, 2, 4. 



The fifth pair of legs are not articulated and firmely fastened to the marginal chiti- 

 nous strings of the joint. Each leg carries 7 5. 



This most remarkable form was found in a sample from Gaspar Sound, Malay Ar- 

 chipelago, the IGth of September 1901. In spite of long searching I could not find more 

 than a single specimen. 



:-!,l :';i^ '.-. ..;-■ : . •.■■■■.■ 



Tortanus gracilis (Brady) Giesbr. 



(n. VII, tig. 11—14). 



{Corynura gracilis Brady. Report of the voyage of Challenger, Vol. VIII, Cope- 

 poda, pag. 71, Pl. XXXIIl. 1883. Tortanus gr. Giesbr. D. Thierreich, Copepoda, 

 Gymnoplea, pag. 158. 1898). i '^ 



Description of the female. Body. Length (anterior part 0,9, posterior part O,?) 

 1,6 mm. Anterior part (j-jointed, (dorsally) 2^'2 times longer than broad. Proportional 

 length of the joints 14 : 4 : 3 : 3^/2 : 1 : 1. Ce (dorsally) truncate with slightly prominent 

 front, constricted behind the front, with a transverse depression in the middle of the 

 joint. No eyes. The frontal organs delicate. Upper lip semicircular with a row of iine 

 hairs. Last segment, laterally, somewhat angular. Abdomen 3-jointed; the genital-segment 

 slightly longer than the next; the anal-segment uniting with the furca, twice as long as 

 Ab 1 -|- 2. Furca somewhat asymmetrical, uniting with the anal-segment, the right branch 



