NOVITATES ZOOLOGICAE XXIII. 1916. 



133 



long scales. This lobe (V) is the remnant of the valve. We shall find the valve 

 more normally developed in other species of Sychesia. The shape of the processes 

 L 1 , L 2 , and L 3 is, of course, different according to the direction from which they are 

 inspected ; cf. text-fig. 13, a dorsal view. The harpe is visible in its entire length 

 if examined from the ventral side (text-fig. 14). In the Brazilian form of dryas 

 (text-fig. 15) process L 2 is absent, and L 1 is bent towards the middle plane of the 

 body instead of pointing upwards, and rounded. The tenth tergite is long and 



Vis is 



Text-fig. 13. — Sychesia dryas dryas, dorsal view of last segments. 



slender, being bent down at the base and then curved upwards, the apex forming 

 a sort of head and beak. The ninth and tenth tergites together, in a side-view, 

 resemble to some extent a swimming bird, the former representing the body. The 

 slightly widened head of the tenth tergite bears numerous bristles, as in the other 

 species of this genus. The penis-funnel (Pen) has the shape of a flagon, the neck 

 being more or less wrinkled transversely : the upperside of the penis-funnel is 

 membraneous, and open along the centre. The penis-sheath, which projects from 

 it, has no external armature, nor does it seem to have an internal armature in any 

 of the species (lext-figs. 12, 13, 16). 



