138 CALIFORNIA ACADEMY OF SCIENCES. 
were not visible from the exterior and could only be ascertained by dissection and 
transparent light. Viewed from the exterior the clitellum appears incomplete. 
Penial sete. The longer seta is hooked at the apex and furnished with five 
notches on the inner side, very much as in B. Bolavi. The shorter seta is less curved 
and about # as long as the larger sete. It is not hooked and the free apex is slightly 
forked, each prong being of the same length. There is no flare or wing between the 
two prongs (figs. 60, 61 and 62). 
Oviducts. Both open together in a central pore in the median line in xiv, 
very close to the groove between xiii-xiy. In the largest of the two adult specimens 
the ovipore was situated abnormally between xv and xvi. 
Intestine and glands. A strong supra-pharyngeal gland as usual. Gizzard in 
vii and viii, separated by a thin wall, as in other species. Tubular intestine extends 
from gizzard to xvii, and is in xy, xviand xvii furaished with the three pairs of 
ealciferous diverticula, of which the two anterior ones are of different construction 
histologically just as in other species. The sacculated intestine commences in xviii. 
There is a typhlosole. 
Spermathece. As usual, in vii and viii. Those in vil were slightly smaller, 
and entirely confined to their somite, wh'le those in viii projected their distal part 
through the septum into ix. The distal part is only a little smaller than the other 
part. The spermatheca is much flattened. Seen from below it appears as in fig. 52 m, 
while seen from the side it looks as in fig. 52 2. The lower part is furnished with 
a very small diverticulum, pointing forwards. The duct leading to the pore is very 
short, almost not set off from the lower sac. 
Oviducts are slender, tubular, with a small and narrow funnel. 
Nephridia. ‘Those posterior to xix are furnished with a coelomic cell mantle 
of oval form, even and regular, and of the same size in the various nephridia. Pos- 
terior to xix we find four rows of nephridia on each side of the median line, the rows 
being reguiar and parallel. The most ventral nephridium or a is situated between 
the setze couples 1 and 2 and 3 and 4. The other nephridia 6, ¢ and d are dorsal and 
lateral. The two dorsal nephridia d and d are about as equidistant as nephridia a and 
a, and much closer together than the dorsal nephridia of B. nana, palmicola and 
Bolavi, the three other species which I have examined. The more ventral part com- 
prising the outlet duct, ete., of nephridium @ is longer than the corresponding parts 
of the other nephridia, and not covered by the ccelomic mantle. The clitellar nephri- 
dia are larger and their ducts thicker than the other anterior nephridia. The 
nephridia anterior to clitellum are very small, except those in somites iv and v, where, 
as usual, the nephridial ducts are long. Each nephridium appears perfect, and built 
on the meganephric plan (fig. 63). 
Benhamia rugosa is readily recognized and characterized by the large papille 
on which open the two anterior prostate pores, by the four rows of nephridia, by the 
forked smaller penial setee, by the corrugation of the anterior somites, inclusive of 
clitellum, by the pointed prostomium, by the flattened spermathéce. 
Since this was written Rosa has described a new American Benhamia from 
