317 
Notes on the Uropodinte. By A. D. Michael. 
with the six of U. Krameri ; but it is very difficult to homologize them 
with the parts in that species, or with the five organs without central 
chamber shown by Winkler in his short description and diagram. 
In the present species the central chamber (pi. Vll. fig. 8, vs ) is very 
much smaller than in U. Krameri , and the testes, &c., seem to com- 
municate with it directly, not by means of a small antechamber, as in 
that species. The five sack-like organs which communicate with it 
consist, firstly , of a very large accessory gland ( ag ), far larger than 
any of the other organs of the system ; this at its hind-margin, &c., 
shows plain signs of having arisen from the coalescence of two paired 
glands ; it is clearly the homologue of Winkler’s unpaired gland ; but it 
is not at all apparent that there is any homologue to it in U. Krameri ; 
for the two posterior sacks in that species are evidently the homologues 
of what Winkler, I believe correctly, considers as the testes. 
The paired organs (tt) are evidently the testes in this species ; 
and they contained filiform spermatozoa as well as spermatogenous 
cells in the specimens which I dissected ; it is rather difficult to say 
whether this single pair of testes is the homologue of the anterior 
pair or the posterior pair in U. Krameri ; it is probably the latter, 
although the appearance is rather of being the former ; if they repre- 
sent the posterior pair, which is most probable, then they may also be 
considered to represent the single pair of testes in Winkler’s species ; 
which is what would be anticipated. The form of each testis in 
G. formicariee is much more that of a nearly globular gland with a 
longish duct than of the gradually diminishing flask-shaped organ 
found in the other species ; in fact, it is much more plainly differen- 
tiated into testis and vas deferens. About half-way between the 
anterior and posterior ends of the great accessory gland, and half 
covered by that organ, lie a pair of almost globular glands (gl) not 
as large as the testes, but still of substantial size ; they are formed 
of moderately large columnar cells with thin walls, and appear to 
function much like the “ oil-glands ” of U. Krameri ; they are, how- 
ever, much further back than those organs ; still it is not improbable 
that they are really the homologues both of the oil-glands and of 
Winkler’s secondary accessory glands ( Nebenanhangsdrusen ), but 
undoubtedly the position is not exactly what might be expected if 
they be. 
The ductus ejaculatorius in this species is short and wide ; its 
opening to the exterior is a simple round hole (ga) surrounded by a 
thick chitinous ring (cr) projecting exteriorly ; from this a supporting 
lamina of thin chitin runs along each side and part of the ventral 
surface of the ductus ejaculatorius, but it does not extend to the upper 
surface. I have not found this support in the other species of 
Uropodinae which I have dissected. 
