PACIFIC COAST OLIGOCHEHTA. 135 
Benhamia papillata n. sp. 
Figs. 43 a, B, Cc, D, E; 52. 
Habitat. 'Tepic, Territory of Tepic, 4000 feet; Mexico. 
Tam unable, on account of want of time, to add any detailed description to the 
short definition of this species given above. When I described Benhamia palmicola 
I possessed only a single specimen of B. papillata,and I supposed that the differences 
in the structure of some of the organs, as well as the presence of the prostate papille, 
were due exclusively to individual variation. But while this paper was being printed 
I became possessed of about twenty specimens from the same locality, all of which 
resemble each other in all the points referred to in the description, and I therefore 
do not hesitate now to assign to them a specific name, especially as I find that this 
species is much more distinct than I at first suspected. While it in many respects 
resembles L. Golavi, it differs in other points which must be considered of specifie im- 
portance. b. papillata differs thus from B. Bolavi in possessing four exterior tubercles, 
one for each prostate pore. The smaller penial seta in B. Bolavi is flat and somewhat 
forked, while in B. papillata the smallar seta is furnished with a sigmoid tip of ex- 
ceeding thinnesss. The clitellum in B. Bolavi and B. palmicola is incomplete, but 
in BL. papillata it is complete even on the ventral side, showing several rows of glan- 
dular cells, but the width of the layer of clitellar cells is much narrower in the central 
part. Clitellum is ventrally complete only in somites xiv, xv and xvi. 
The following are the other points of interest as regards the character of this 
species: It is larger than B. palmicola. The four papille, each one of which 
carries a prostate pore, are very distinct and prominent, and they stand close together 
in the sunken genital pit of the clitellum. The median central papilla, on which open 
the ovipores, is elevated and oval. The two ovipores are situated in the center of the 
papilla, but entirely separate. They are in the very center of the somite and ina 
line drawn between setee 1 and 1. In B. palmicola the ovipores join, and the common 
pore is situated somewhat in front of a line drawn between sete 1 and 1. Longitu- 
dinal section of a specimen shows that the septum separating somites xiii/xiy is very 
much cupped, and the oviducal funnel is situated exactly above the central papilla in 
xiv and dips down straight to the ovipore. The anterior septe are hardly thicker 
than the posterior ones, but they are all very much cupped. Sacculated intestine 
commences in xix. There is a strong superior typhlosole in xx to xiv. Of the three 
pairs of calciferous diverticula the anterior one in xy is very much, or about four 
times, smaller than each of the posterior ones. The glandular part of the prostate is 
folded and quite thick, but confined to one somite. 
Penial sete. ‘The penial sete are the most distinet character of this species, 
besides the tubercles of the prostate pores. In general shape the two setee are much 
more slender than those of B. palmicola, and several times narrower at the apex. They 
are so thin that it required an oil-im. 1/12 to show their structure sufficiently to enable 
me to sketch it. The larger seta is slightly curved, gradually tapering from the root 
to the apex. The apex is much less curved than that of B. Bolavi or B. palmicola, 
and furnished with seven or eight shallow but still distinet notches. But the smailer 
