54 W. Lilljeborg on the Genei^a Liriope and Peltogaster. 



the sides by a large oviferous sac. On the lower part of the 

 ovarian sac there are two elongated cylindrical bodies surrounded 

 by connective tissue^ by which they are attached to the sac (c c, 

 and fig. 9). The author regards these as testes, principally 

 from his observations on the allied new form Apeltes. From the 

 more obtuse and whitish extremity, which is surrounded by a 

 rather thick cellular membrane, issues a narrow and compact 

 serpentine canal {b), which is attached to the membrane of the 

 oviferous sac. 



The ovarian sac is attached by connective tissue to the ovi- 

 ferous sac which surrounds it, and anteriorly {a) and posteriorly 

 to the inner membrane of the pallium ; it sends a small tube 

 into the neck of the adhesive organ. The external chitinous 

 membrane of this sac is furnished with raised and regular longi- 

 tudinal bands, which appear to have a canal in their interior. 

 Under this outer membi-ane there is another, which is cellular 

 and fibrous, and resembles the muscular coat of the pallium, 

 except that the muscular tissue is rather denser. The ovarian 

 sac thus presents a great conformity of structure with the pal- 

 lium. In one individual its anterior extremity was produced 

 into the pallial orifice, so as to be visible before the removal of 

 the pallium. The author detected no aperture at the anterior 

 extremity ; the membranes there were only a little thinner ; nor 

 did he succeed in finding the aperture through which the ova 

 must escape from the ovarian sac. 



The ovaries contained in the ovarian sac form two sacs parallel 

 to the axis of the body. In their lateral portions these sacs bear 

 lobules or branches of different lengths, and they become con- 

 founded at their posterior part. They vary both in form and 

 volume as the eggs are developed. In the specimen represented 

 in fig. 8, the ovaries contained ova, cells, and intercellular sub- 

 stance. Some of the ova were tolerably large, and filled with a 

 great number of vesicles. The ovarian sac was whitish, tinged 

 posteriorly with yellowish red. 



The ovarian sac in Peltogaster corresponds exactly with the 

 part called " corpus carnosum" in Sacculina by the author. Its 

 principal contents are ovaries ; and it is clear that the ovarian 

 sac, as well as the " transformed body" in Sacculina, must ab- 

 sorb the food. 



The testes (PI. II. figs. 8 c & 9) are always of the same 

 form. Their colour is greenish yellow, with darker transverse 

 lines. Their walls are compact, thick and opake, and formed of 

 several layers of cells. They are surrounded by a sac of con- 

 nective tissue, which is very thick and cellular at the part whence 

 the canal issues and which surrounds the canal itself. They are 

 empty in specimens with a greatly developed oviferous sac ; in 



