34 Art. 3.— T. Kabnraki : 



lular cords with the cells arranged in one or more rows; the}^ are 

 very extensively distributed posteriorly from the region of the 

 ovaries and in the interstices between the gut diverticulae medial- 

 ly to the testes, so that there seems little room left for paren- 

 chyma. The cell cords stand in connexion with the oviduct at 

 numerous points throughout the whole length. 



In structural respects the vitelline gland is in all the species 

 quite similar and is ver}^ simple. Unlike the ovary the organs are 

 not surrounded by a definite membrane, the tunica propria. The 

 vitelline cells are arranged close together, and in sections the cell- 

 boundaries can be clearly made out with ease. The cell in the 

 fully grown state is very large, and contains an ovoid or spherical 

 nucleus, the latter being small in proportion to the size of the cell. 

 There exist numerous highly refractive granules in the protoplasm, 

 increasing in number as the growth of the cells proceeds, till even- 

 tually, when the cells have attained their full size; they form a 

 relatively large proportion of the cell mass. 



As to the function of the gland I am not in a position to 

 make any assertion, but as is well known, they furnish in all 

 probability not only the necessary nutriment for the embr3^o but 

 also the substance of the cocoon. 



Oviduct. — In Procerodes the oviduct generali}^ starts on 

 either side from the postero-lateral surface of the ovary. They 

 proceed straight backwards along and just outside the longitudinal 

 nerve cords, turning towards the median line in the region of the 

 vagina and, finally, in Pr. lactea (Text figs. 1. 4), opening directly 

 into a small outbulging of the vagina at the postero-inferior aspect 

 and, in St. trlgonocephala (Text figs. 2, 5), opening immediately 

 into the vaginal canal at the postero-inferior portion. But in Ect 

 limuli the course of the oviduct and its relation to the ovary are 

 very different, (Text figs. 3, 6; PI. I., fig. 7). After leaving the 

 ovaries at the outer-lateral part, the}^ proceed backwards at a con- 

 siderable distance outside the longitudinal nerve trunks, and then, 

 in the region of the genital vestibulum, are directed towards the 

 median line mounting dorsally at the same time and open into 

 the vestibulum at the supero-lateral portion. 



