1904. 



NATURAL SCIENCES OF PHILADELPHIA. 



807 



neighboring organs. The flat, spreading diverticulum opens into the 

 base of the stalk by a short, narrow duct. In three specimens dis- 

 sected the pouch increases in size successively from the first to the 

 third spermatheca and the diverticulum diminishes correspondingly. 

 While completely divided into two or even three lobes in the first, 

 the latter is in the second and third cither simple or very faintly 

 bilobed. 



The testes occupy the usual position in somites X and XI, and two 



IX 



pairs of sperm sacs are borne on the anterior face of septum ^ and 

 the posterior face of septum ^. The latter are much and deeply 

 lobulated, having the aspect of dense tufts of broadly clavate or stalked 

 spheroidal bodies. The sperm funnels lie in somites X and XI attached 

 to the posterior septa near the coelomic floor and close to the ventral 

 nerve cord. They are of simple form and consist chiefly of a pair of 

 broad lobes partly folded together like the two lobes of a Dioncea leaf. 

 After penetrating the septa the vasa deferentia plunge at once into the 

 longitudinal muscular layer of the body wall which they penetrate 

 to a depth of about i of its thickness, and continue at this level in 

 the line of the ventral setae to a point near the male gonopore, when 

 they bend sharply outward toward the surface. Throughout their 

 course the two vasa deferentia of each side lie side by side, but are 

 perfectly distinct untfl quite at the external orifice, where they coalesce 

 at a common opening. The ovaries are conspicuous, fimbriated, fan- 

 shaped structures consisting of numerous 

 chains of ova attached to the posterior face 

 of septum -xin- Trumpet-shaped oviducts, 

 the mouths of which are formed very much 

 like the sperm funnels, perforate the septum 

 -^^, and at once penetrate the body floor 

 obliquely backward and inward. Near the 

 fxternal surface they bend sharply toward 

 the median line and open in the setae zone on 

 the ventral surface of XIY, separated by an 

 interval of about j a-a or less than the 

 transverse diameter of the nerve cord with 

 its sheath. The external pores are so 

 small that they can be detected only n sec- 

 tions. The prostate glands (fig. 2) are large 

 and conspicuous, and are variously folded 

 sharply back and forth evcral times within 

 the limits of the single segments XVIII 



