132 MISSOURI BOTANICAL GARDEN. 
PART II, 
This part may be looked upon as supplementary to Part 
I., and is intended to bring together some descriptive 
details, as well as some other details upon which the gen- 
eralizations in Part I. are based. In connection with the 
new species that will be characterized, it will be convenient, 
and of some advantage to those interested in the subject, 
to bring together the previous descriptions. 
INTERNAL STRUCTURE OF PRONUBA YUCCASELLA WITH REF- 
ERENCE TO THE REPRODUCTIVE ORGANS. 
We have already considered the chief external charac- 
teristics of the female. If we examine the internal anat- 
omy, we find that the ovaries are large and pyriform, 
composed of four multilocular tubes gradually enlarging to 
the point of insertion in the oviducts and with the opposite 
extremity prolonged into a binding cord attached to the tho- 
rax. The oviducts are rather short. There are two large 
sebaceous glands and two smaller accessory glands, and a 
large copulatory pouch connected with the oviduct by a 
short tube or canal which opens close to the entrance of the 
ductus seminalis, this leading to the receptaculum seminis. 
This receptaculum is nearly as large as the bursa, pyri- 
form, flattened dorso-ventrally when empty, but more 
rounded when filled with semen. Its chief characteristic, 
however, is a pair of curious brown radiate bodies the rays 
or spicules springing from a central hub, which looks like 
the disk of a composite flower. These bodies are attached 
at opposite sides of the pyriform sac and are so large 
and conspicuous as to be readily seen through the walls 
of the abdomen when this is mounted in balsam. The 
hub is concave from the outside and convex from the in- 
terior, the disc presenting a granulated structure and the 
spicules radiating from its margin obliquely into the in- 
terior of the sac. Each spicule, when closely examined, is 
seen to have along its inner border, a hollow groove run- 
