natural, history

. '.gaps (I), 13 (6), 14 (2), 15 (5), 16 (4), 17 (2), 18 (2). The first dorsal pore is on 11/12(2), 112/13 (26), 12/13 (2), 1?l3/14 (6). .,The.clitellum is annular, without setae, dorsal pores and intersegmental.furrows,and ends definitely in front of the setal circle of xvi (which is complete) on each specimen.Clitellar glanduJarity is slight in front of the equator of xvi, the thickness of theepidermis decreasing to 13/14.Spermathecal pores are minute, on 4}5-8/9, in fairly widely separated groups ofone to five, the total number varying from 23 to 33 as shown below. Spermathecae ofVaration in number of spermathecae.4/5 3-3 3-3 2-3 3-2 2-3 4-2 3-2 3-3 2-3 4-4 2-3 3-3 1-25/6 2-3 3-4 4-3 3-4 3-3 3-3 3-2 3-3 3-3 3-4 3-3 4-4 2-26/7 2-3 3-4 3-3 3-3 2-2 4-2 2-2 3-3 3-3 3-3 3-3 4-4 3-27/8 2-2 3-4 3-3 4-3 3-3 5-3 2-3 2-3 2-3 3-2 4-3 4-4 3-48/9 2-2 2-2 2-2 3-2 1-2 2-3 2-2 2-2 2-2 3-4 3-2 4-4 2-2Total 24 31 28 30 24 31 23 27 26 33 29 30 23Average for 13 specimens, 27.6"3-2": Three spermathecae on the left side, two on the right side, opening to the exterior on theintersegmental furrow indicated to the left of the table.ix are completely lacking in two specimens. Female pores are closely paired (40 specimens,number and location of pores not determinable with certainty in others). Malepores are minute and superficial, widely separated, each on a small transversely placedtumescence at the setal equator wjth ends rather narrowed laterally and mesially.Each male porophore is distinctly delimited anteriorly, as well as posteriorly, by atransverse furrow but lateral and median margins are, much less definite. A transversetumescence without any grey translucence is present immediately in front of and behindeach porophore.Genital markings are small, circular to transversely and then shortly elliptical,each with a wide, raised, opaque rim and a depressed greyish translucent center. Markingsare presetal, in four longitudinal ranks, one just lateral to the median plane oneach side, ooe about in line with the male porophore on each side, and are located asfollows: on xvii (51 specimens), xviii (51), xix (51), xx (50), xxi (23), xxii (2), xvi (I),xi (8), x (5), ix (I). Markings of the two lateral ranks are lacking 00 xviii on eachspecimen, on the preclitellar segments, and behind the c1itellum on one worm.Internal anatomy. Septum 8/9 seems to be lacking. 9/10 present but membranous(8 specimens), none very thickly muscular. The intestinal origin is in xv (8).Intestinal caeca are simple, short, confined to xxvi (4) or reaching into xxv (4). Adefinite typhlosole is lacking but the roof of the intestine is thickened mid-dorsally,from the caecal segment posteriorly. The thickening usually is slight and recognizableonly as a band of greater opacity in the gut wall that it is not at all protuberant intothe IUlpen (the roof quite smooth). The band, in two specimens, however seems to be•15