288 CALIFORNIA ACADEMY OF SCIENCES. 



Fig. iSb. O. coiiti-artux. Spermatheca from the left side of somite ix; same 

 individual as last, showing the slight variation in size and form. 

 Fig. 44. 0. agricola. Ventral view of the clitellum and male poi-es. 

 Fig. 45. O. contractiin. Distal end of spermatheca more magnified. 



Plate VIII. 



Fig. 46. 0. agricold. The prostate gland and the enlargement of the 



sperm diict. Only a part of the prostate is shown; the beginning 



of the glandular partis in somite xviii and the end in somite xxvi. 



Fig. 47. 0. limkola. The two prostates in somites xvii and xviii. 



Fig. 48. 0. Rosic. The prostate and the enlarged sperm dnct in somite 



xvii. 

 Fig. 41). O. Beddardi. The prostate and the sperm duct somite xvii. 

 Fig. 50. (). contractus. The prostate and sperm ducts in somite xvii. 



]tr. prostate. 



■sp. d. sperm duct. 



V. (/. ventral ganglion. 



7ns. muscular band confining the lower parts of the sperm ducts 



and the prostates to the parietes of the somites. 



Fig. 51. O. contractus. The lower part of the prostate and the enlarged 



sperm duct, showing the relative size of the lumen in the latter. 



Fig. 52. <>. contractus. The ovary and oviduct in somites xiii and xiv. 



Fig. 53. (>. limkola. One of the prostates and part of the sperm duct in 



somite xvii. 

 Fig. 54. 0. agricola. Side view of somites iv to xii. 



v. s. sperm-sacs. 



N.s'. /. lobed sperm-sacs. 



/(. hearts. 



s. septa. 



.•>■/. (/. salivary glands. 



sp. (/I. septal glands in v, vi, vii and viii. 



spth. spermatheca. 



drt. diverticulum of the oesophagus. 



t. testes. 



(e. oesophagus. 



v. /. sacculated intestine in xii. 

 Fig. 55. O. Beddardi. The prostate and j^art of sperm duct. 



St. inner seta in somite xvii. 



c.p. copulatory papilla. 



b. w. body wall. 



sf). d. sperm duct. 



jtr. prostate. 

 Fig, 56. O Beddardi: The lower part of the prostate showing the mus- 

 cular part. 

 Fig. 57. 0. sonor(f. Part of the sperm duct close to the male pore. 



