58 W. G. RIDEWOOD. 



The testes, when fully formed, are slightly larger than the ovaries, and measure 

 9 by '6 mm., or, if less elongated, '83 by '75 mm., and the ducts are as a rule not 

 coloured red, and are shorter and narrower than the oviducts. The shape of the testis 

 is ovoid or pyriform (fig. 41), and there is no tendency to elongation, as there is in 

 the testes of C. sibogae (10, p. 85) and C. nigrescens (fig. 37). 



The males and females differ only in respect of their gonads and ducts, and 

 possess no secondary sexual characters. They occur mixed up in the same agglutinated 

 crowd in the internal cavities of the tubarium. The buds are not necessarily of the 

 same sex as their parent. One of the male polypides of specimen F was found to 

 possess a bud with a pair of fairly large ovaries. 



The specimens of C. hodgsoni dredged by the ' Discovery ' were not all obtained 

 from the same situation, nor at the same time of year, and some of the differences 

 in the state of the gonads may possibly be attributable to seasonal changes. The 

 condition of the gonads in the various specimens is as follows : 



In specimens A and B the majority of the polypides are females with small 

 ovaries. A few are males with comparatively large testes ( * 86 by '67 mm.) and colourless 

 ducts. Two polypides were found in which both testes had red ducts, and in these 

 two specimens one testis was large and the other small. One polypide was found 

 with a large testis and a small ovary, both with red ducts (fig. 47). It is worthy 

 of remark that no ripe ovaries are present in specimens A and B. 



In specimen C the numbers of male and female polypides are about equal. 

 The females are on the whole less mature than the males, and their gonads are 

 in some cases very small. One hermaphrodite polypide was found, possessing a 

 large testis and a small ovary. No testis ducts of material C exhibit any red 

 colour. 



It is only in specimen D of C. hodgsoni that free ova are found. They occur 

 singly, they are pale yellow in colour, and ovoid in shape (fig. 48), they measure 

 about '47 by '42 mm., and are attached by a narrow pedicle to the inner surface 

 of the tubarium. Of fourteen polypides examined thirteen were female and one was 

 male. Some of the females have fully developed ovaries, with red ducts, and 

 also with red spots in the interior of the ovary ; other polypides, of the same size 

 as the former, have minute ovaries with no red colour in the oviducts, nor in the 

 ovaries. The single male found has two large testes, one of which has a red duct. 



In specimen F female polypides are commoner than male, and less mature. 

 In the least mature females the ovarian part of the generative apparatus is small 

 as compared with the size of the red oviduct (figs. 43 and 46). The largest 

 ovary found measures '5 by '45 mm., not including the duct, and the testes of 

 the males measure '8 by '75 or '83 by '7 mm. The testis ducts are narrower 

 than the oviducts, and are not red. 



In specimen G all the polypides examined are very immature females ; the ovaries 

 are extremely small, about * 05 mm. in greatest width, and ' 1 mm. long, including 



