16 G. O. Sårs. 



largely developed testicular vessels, which are very distinctly 

 observable through the pellucid outer coating of the shell 

 (see figs. 2, 3) They form on each side a fascicle of 4 

 densely crowded slender tubes doubled upon themselves, 

 their outer parts being, by an abrupt bend, curved upwards 

 and forwards along the dorsal face. Another tube extends 

 opposite the others within the anterior part of each valve, 

 encircling it at some distance from the margin, and termi- 

 nating at about the middle of the ventral face. Within the 

 abdominal part of the enclosed animal, too, several irregu- 

 lar band-like coils are seen on each side of the intestine, 

 having at first sight much the appearance of a long twisted 

 duct. As I have elsewhere shown, in describing in detail 

 another exotic Cypridid 1 ), these coils are nothing but dense 

 fascicles of the enormous zoosperms poured out from the 

 testicular tubes and accumulated within the body-cavity. 

 The true efferent ducts are represented by the peculiar 

 organs, which by earlier authors have been described as the 

 mucous glands, but which are now generally recognized as 

 an ejaculatory apparatus. In most other male Cypridids 

 this apparatus is very largely developed, and easily observ- 

 able through the skin, whereas in the present form I could 

 not at first detect even the slightest trace of it; and it is 

 indeed only by a very careful dissection that I have been en- 

 abled to prove its presence also in this form, though in a very 

 rudimentary condition (fig. 19). As in other Cypridids, it 

 consists on each side of a cylindrical, tube-like part extending 

 somewhat veutrally through the abdominal part of the body, 

 and exhibiting a striated central axis surrounded by a 



*) G. O. Sars, On some Ostracoda and Copepoda raised from 

 dried Australian mud. 1889. 



