BY VERA A. IRWIN-SMITH. 807 



I have not been able to determine their exact nature, but they 

 evidently bear some relation to the setie, and are probably 

 glandular. A large and prominent tail-gland {t.y.) lies dorsal to 

 the rectum. From this, a narrow duct, with very definite walls, 

 runs backward to open by a prominent pore, situated at the 

 posterior extremity of the tail. In several specimens, clear, 

 oval drops may be seen lying in the duct. 



The male genital apparatus (PI. xlviii., t.) consists of a single, 

 straight cord running through the body-cavity ventral to the 

 alimentary canal. It begins towards the anterior end, and 

 appears to open posteriorly into the rectum. Its anterior end 

 consists of a solid mass of oval sex- cells in two or three closely 

 packed rows. Further back, the sperms become gradually differ- 

 entiated, and lie free in a wide tube, which passes abruptly, 

 about the middle of the body, into a thick-walled passage, ap- 

 parently filled with a solid, granular matter. There are two, 

 equal, penial setae (Fig.49, ^>.s.) lying dorsal to the rectum. Each 

 is a long, slender, curved rod, with an expanded, flattened, 

 proximal end. 



The reproductive organs of the female (PI. xlix.) consist of two 

 ovaries, anterior and posterior {a.ov.^ p.ov.) which are connected 

 by a wide, median uterus. The latter opens on the ventral 

 surface, in front of the middle of the body, by a wide, transverse 

 slit, with thick walls. The ovaries are straight, fairly elongated, 

 and broadly spindle-shaped. Towards the uterus, each becomes 

 divided into a single row of long, narrow cells, cut off in a trans- 

 verse direction across it. It narrows as it approaches the uterus, 

 and is here sharply pointed, the contained cells being smaller and 

 more numerous. The uterus forms a receptaculum seminis 

 which, in most specimens examined, contains sperms. None of 

 the specimens examined contained ripe ova, and the development 

 has not been followed out. 



Type-specimens, Nos. W, 456, 457; in the Australian 

 Museum, Sydney. 



