NO. 2263. 2^EW AFRICAN EARTHWORMS— SMITH AND GREEN. 157 



terior to clitelliim), aa: ah: he: cd=d: 5:8:2; dd equals about ^ cir- 

 cumference. Clitellum, 13f-^18; complete vcntrally, 14-J16. Nepli- 

 ridiopores, near seta line d. Male pore, median ; anterior part of 17. 

 Oviducal pores, posterior part of 14, nearly in line with nephridi- 

 cpores. Spermathecal pore, median on 18/19. Septa 5/G and 11/12, 

 somewhat thickened; 6/7-10/11, more strongly thickened. Gizzard 

 in 5. Unpaired esophageal pouches in 9, 10, and 11. Calciferous 

 glands, paired in 13. Sperm vesicles (inclosing spermaries and 

 spermiducal funnels) and sperm magazines in 11. Sperm sacs ex- 

 tend posteriorly from sperm vesicles to about 36. Prostate glands, 

 tubular; open separately into the bursa. Spermatheca, forked at 

 anterior end into two large branches; unpaired median part, with- 

 out lateral or posterior diverticula. 



One specimen, collected at Mkonumbi near Lamu, British East 

 Africa, by William Astor Chanler in 1892. 



H oloty pe.—C2it. No. 16834, U.S.N.M. 



Longitudinal sections were made of the half of the anterior 23 

 somites on the left side of the median sagittal plane. The other half 

 is left united with the remainder of the worm. 



External characters. — The olive-buff color of the alcoholic speci- 

 men is more pronounced on the dorsal surface than on the ventral. 

 The length of the specimen which is evidently much contracted is 

 10.9 cm., and the maximum diameter which is at the clitellum is 

 0.5 cm. There are 148 somites and those anterior to the clitellum are 

 about twice as long as the others and more strongly elevated. The 

 arrangement of the setae in somites posterior to the clitellum is 

 approximately indicated by the formula aa: ah : he: cd—9 : 5 : 8 : 2. dd 

 equals about one half the circumference. No evidences of setae were 

 found on 14-16 and only cd on 17. The length of seta h of somite 

 9 is 0.25 mm. and of somites just posterior to the clitellum it is about 

 one third greater. No modified genital setae were found. The 

 clitellum includes 14-17 and encroaches slightly on 13 and 18. It is 

 complete ventrally from the anterior border of 14 to the middle of 

 16 but is incomplete ventrally elsewhere. 



The nephridiopores are nearly in seta line d, with those of a few 

 anterior somites slightly dorsal to it and others slightly ventrad. 

 The male pore opens mid-ventrally on a small protuberance slightly 

 anterior to the middle of 17. The spermathecal pore is mid-ventral 

 in 18/19. The wall is slightly thickened around each of the two 

 pores but there is no modified genital area. The oviducal pores are 

 on 14, near its posterior border, between seta lines c and d, but 

 slightly ventrad of the nephridiopores. 



Internal characters. — The internal organization of this worm cor- 

 responds quite closely with that of other members of the genus. 

 Septa 5/6 and 11/12 are somewhat thickened, while 6/7-10/11 are 



