564 DR. L. ORLEY. 



spermathecse, which appear to open on the ventral surface 

 between the somites ix, x and x, xi respectively. 



The ovaries lie in somite xiii, one on each side of the ventral 

 blood-vessel, attached to the hinder face of the septum between 

 the somites xii and xiii ; they contain many ripe eggs, which 

 are chiefly found at the free end of the ovary. I have not 

 found a pointed prolongation at the distal end of the ovary. 

 The oviducts lie opposite each ovary between the somites xiii 

 and XIV; their plate-like funnels project into the former somite, 

 and their very diminutive canal opens to the exterior on the 

 ventral surface of somite xiv. 



I have not found separate yolk and cement glands. The 

 horn-like sperm atophores (Hoffmeister's '^ penis-formige 

 Korpchen "), 6 to 8 mm. in length, are found in the neighbour- 

 hood of the male pore; their number is variable, and they are 

 usually placed ventrally, although exceptionally they are to be 

 met with on the dorsal surface. As a rule only two are situated 

 on the neural side of somite xiii, close to the ventral setae ; 

 though very often they are some distance from them. They 

 are always in pairs, from two to six in number ; only once have 

 I found eight spermatophores, which were arranged irregularly 

 round the male pore. These structures are products of copula- 

 tion, and appear only during this operation ; whether they are 

 formed in the sperm-duct, or by the swellings in front of the 

 genital pore, I am unable to say with certainty. The spermato- 

 phore, the shape of which is exactly rendered by fig. 7 (PI. 

 XXXVIII), consists of an homogeneous, hyaline, mucous sub- 

 stance, in which are embedded numerous fine, enlongated fila- 

 ments. The lumen is fairly wide and deep, open at the end, and 

 filled with bundles of spermatozoa, which are massed together in 

 a spiral fashion. The fibres in the wall can scarcely be the pro- 

 duct of the epiderm cells ; moreover, the spermatophores vary 

 so much in number and position that one can scarcely admit 

 that they are formed by the swellings. I think it more likely 

 that they are formed in the spermathecse, there filled with sper- 

 matozoa, and that they are then attached in position during 

 mutual copulation. The broad basal portion clings fast to the 



