studies oil marine Ostracods 033 



The second joint is about as long as the four or five following joints together. The third 

 to the ninth joints are about the same length, as is the case in the female. The fourth to the 

 ninth joints have extremely weak, scarcely perceptible, basal spines. Endopodite: The three 

 bristles on the second joint have rounded points, furnished with a very short distal sensory hair. 

 The longest of these bristles is somewhat longer than the breadth of the joint at the point where 

 the bristle is attached; the shortest is only about a seventh of the length of this bristle. The 

 end joint is very much flattened and has hyaline side borders. On the inside at its point it is 

 provided with a few weak transverse chitin lists. Its proximal bristle is at least a third of the 

 length of this joint (broken). 



Mandible: — P r o t o p o d i t o: Basale: The backward pointing process has the 

 same number of bristles as in the female. Of these bristles the distal end bristle and the 

 dwarf bristles are practically the same size as the corresponding bristles in the female. The 

 distal end bristle is, at least towards its point, armed with rather strong secondary spines. The 

 three other end bristles and the triaena bristles are, it is true, practically the same length as the 

 corresponding bristles in the female, but they are very weak and have very weak armature; 

 the main pair of secondary spines on the triaena bristles can scarcely be distinguished from 

 the proximal secondary spines, which are almost like hairs. The bristle on the middle 

 of the dorsal side of this joint is perhaps somewhat longer than the corresponding bristle 

 in the female. The dorsal side of this joint is, apart from this, quite smooth without 

 any of the hairs and spines that characterize the female. Endopodite: First joint: 

 Of the three ventral bristles the shortest one is armed at the middle with numerous rather 

 fine, long secondary bristles placed on all sides; distally it has short hairs. The two 

 others have no short secondary bristles proximaUy of the long ones. Second joint: This has 

 three proximal bristles differing somewhat in length, the longest not half the length of the 

 main bristle a. The medial cleaning bristles showed the following numbers and arrangement 

 on the specimen investigated: 



7 bristles in a distinct lower row. 



4 „ „ „ „ upper .. 



2 ,, near the main bristle b. 



1 bristle between the main bristles a and b. 



Right mandible 



Left mandibU 



7 bristles in a distinct lower row. 



5 „ „ ,. „ upper ., 



3 ,, near the main bristle b. 



1 bristle between the main bristles a and b. 



These bristles were somewhat longer than the corresponding ones in the female, but, 

 on the other hand, they were somewhat more weakly armed than these. The end claw was like 

 that of the female. 



Seventh I i m Ij: -- The cleaning bristles were armed with from two to four bells. 



The f II r c a had nine or ten claws, of which the six or seven anterior ones may be termeil 

 main claws. Tiie anterior main claws are somewhat more decidedly bent than in the tVmale 



