91 



probably resemble K. cirrosa in its general outlines.. As 



in the female, the genital gland is situated posterior to 

 the alimentary canal, at the extreme end of the visceral 

 dome. It is rounded in shape and opens to the exterior 

 by: — (1) Two coelomic canals, right and left, which open 

 anteriorly into the testes (Text fig-. VIIa, W. V. C.)\ and 

 (2) one sexual duct, which is the left, the right being 

 atrophied. The hinder portion of this duct is coiled into 

 a spiral mass lying on the left antero-dorsal wall of the 

 genital gland (Text figs. YIIa and n.j. The different 

 regions into which it is divided when spread out are shown 

 in Text fig. VIIc. Much of this duet is ciliated internally. 

 The part visible from the mantle cavity resembles in 

 position and appearance the left oviduct of the female 

 (PI. II, fig. 8, pen.). 



A narrow winding vas deferens leads off the sperma- 

 tozoa from the testes (Text fig. VIIc, !"./>.), and then 

 widens to form the vesicula seminalis. This region and 

 the prostate and accessory glands are concerned in the 

 formation of the spermatophores, i.e., they form a tube 

 round the spermatozoa (Text fig. VIIc, V. S., Pr.). 

 Needham's sac (Text fig. VIIc, N x ). into which the 

 spermatophores now pass by a short thin vas efferens, is a 

 store, where they are arranged side by side longitudinally, 

 to await expulsion through the penis. As in the ovary of 

 the female, (he ventral wall of the testis is alone 

 germinal. 



Spawning. 



The eggs examined were spawned by a specimen of 

 E. cirrosa in a tank at Plymouth in July, 1903. Since 

 the crabs placed in the tank as food for the Eledones 

 attacked the ova, only two bunches were saved. The 

 ova have not, as yet, been dredged, or taken in the 



