136 CALIFORNIA ACADEMY OF SCIENCES. 
seta differs entirely from that of the B. Bolavi group. Instead of being more or less 
distinctly forked and wider at the apex, as in those species, it is drawn out to an ex- 
ceedingly thin hair-like point, which is sigmoid (fig. 43 ¢). In shape the seta is almost 
straight, with the two ends slightly curving. 
The papille of the genital region are most characteristic. Each papilla forms 
the exterior apex of a prostate. With a low power lens these papille appear round, 
but under a higher power they appear rosette-like, and consist of two or three divisions, 
one on top of the other. The ventral part of segments xvii, xvili and xix, carrying 
the genital pores, is much contracted, and the papillee appear as ina bunch. The 
distance between the male or spermaducal pore and the prostate papilla is Just about 
the same as the base of the papilla. 
In a section the structure of the oviducal median papilla appears to greatly 
resemble that of the tubercula pubertatis of Sparganophilus. IT find there the same 
relatively large number of tall, narrow cells, radiating from the ovipore, but I cannot 
discern any sense cells. 
The spermathecz differ in shape from those of B. palmicola. ‘The apical sac 
is not globular, but pointed and narrow, as represented in fig. 52 G and H. 
The nephridia also differ some from those of B.palmicola. In this species the 
inner nephridium, or a, consists of two parts, each one with a ccelomic mantle separate 
from the other, but in b. papillata nephridium a consists of three distinct parts, each 
one with a coelomic mantle. This, of course, refers only to the posterior nephridia; 
the anterior ones are not covered by ccelomic mantle. 
Sperm-sacs in x and xi, not racemose. In other respects, as far as I can judge 
by a hasty examination, this form resembles B. palmicola. 
Benhamia rugosa n. sp. 
Figs. 56-63. 
Habitat. Native habitat unknown. The eight specimens in my possession 
were found in the orchid house in the Golden Gate Park of San Francisco, California, 
under pots. Two were adult, two imperfectly developed, the others immature. 
July, 1895. 
Color reddish flesh. 
EXTERIOR CHARACTERS. 
Size, 30 mm. by 14 m. 
Segments, 118. Cephalic lobe very long, pointed. 
Clitellum incomplete. 
Dorsal pore, most anterior y—vi. 
Oviducal pore, one single in the median line in xiy. 
Prostate pores, the anterior ones elevated on tubercles. 
Penial sete. Largest seta with five notches, smallest seta forked with prongs 
of equal size. 
Common sete. All ventral in four couples; the inner sete are present in xviii. 
