HANSEN AND SÖRENSEN, THE TARTARIDES. 21 



The following conspectus of the chara eters for the Oxopoei 

 and Tartarides is an abstract of the preceding pages. We 

 include all differences in our opinion worth mentioning; those 

 which according to our judgment are of special importance, 

 are printed in italics. 



A. Oxopoei Thor. 



Cephalothorax on the dorsal side wiih an undivided shield. 



Eyes ivell develoyed; two close togetJier in front, and more behind 

 towards each lateral margin one group with three large and 

 — piohahly ahvays — two very small eyes. 



The large cephalic sternuni has its lateral angle produced into 

 a narrow wing proceeding outAvards and upwards behind 

 the insertion of the first pair of walking legs above the 

 distal end of the coxse of the second pair of legs; its 

 anterior margin is produced at the middle, and each 

 lateral half concave. 



Pirst abdominal sternite very firmly chitinized; fourth ster- 

 nite as long as or shorter than the third and much shorter 

 than the fifth. 



Flagelluyn long, filiform. icith many movable joints, similar in 

 both sexes; probably always with a yellowish »spöt» on 

 the lower side of several joints. 



Pirs t joint of the antennse a little deeper at the base than 

 at the end; the equipment with blood-hairs on its distal 

 part and on the »claw» very rich. 



Mandibles together somewhat broader than long; their ventral 

 junction along the mesial line occupies nearly two thirds 

 of the length from their base to the end of the mandu- 

 catory lobes. 



Mandibular palps are folded essentially in the horizontal plane; 

 the tibial part with a conical process from the distal inner 

 angle; the tfirsal part claw-shaped, at the base narrower than 

 the end of the tibial part, moving itself against the process 

 mentioned: both together C07istituting the tivo fingers of a chela. 



Coxge of the first pair of walking legs with their lower sur- 

 face in a considerably higher plane than that of the follow- 

 ing coxse and the mandibles; they are shorter than, and 

 only about half as broad as, the following pairs. 



