lUHANO TILL K. SV. VKI.-AKAI). HANDL. BAND. 3. N:0 13. 9 



parations, and to the structure of which I have not paid par- 

 ticular attention, I shall here only mention in a few words. 

 They show a somewhat large lumen in which the inner mem- 

 brane forms very deep folds. The mushroom-shaped organ 

 (29 b) which contains their common efferent duct is, at its iree 

 and dilated end (30), provided with a number of conical ex- 

 crescences (31), and the widening of the rectum, in which 

 this organ is inclosed, has a great number of lealiike protube- 

 rances (6 t). It seems to me probable, that the two glands 

 are testes and that the niLishroom-like organ performs the of- 

 fice of a penis, but to make this matter clear, living speci- 

 mens are of course necessary. In front of each of these 

 glands is a cordlike organ of a very peculiar kind (36). This 

 organ is fastened by its anterior and upper extremity (36 a), 

 to the muscular coat beside the back part of the ovary. From 

 this point it extends backwards and downwards to a point im- 

 mediately in front of the anal orifice, where the lower ex- 

 tremity (36 b) seems to be attached to the muscular coat. 

 But before reaching this point it gives off two pretty strong 

 branches, the anterior of which (36 c) is attached to th^ mus- 

 cular coat and the posterior or inner (36 d) to the wall that 

 incloses the hollow, in which the organ supposed to be a 

 penis, is situated. The cord-like organs each contain two stafF- 

 like bodies, probably of carbonate of lime. Both these staves 

 are thicker at the upper end, and gradually taper downwards; 

 but whereas the one is awl-shaped and almost round (37 a), 

 the other is shaped into a furrow in which the first is placed(37b). 

 The cordlike covering, which incloses these two staves, ap- 

 pears to be differently constructed in difierent parts, but is ge- 

 nerally distinguished by its fibrillous character. Part of the 

 fibres are connected with small cells, and present a most sin- 

 gular appearance, somewhat resembling the gangiionic cells in 

 the sympathetic nerve- system of the higher animals. It seems 

 in fact as if there proceeded, in opposite directions, a thick 

 thread from each side of the cell, spun round with other fine 

 threads issuing /rom the same cell. On closer examination I 

 think however I can discern that the cells, instead of emitting 

 the thicker threads, only lie close beside them, and that what 

 looked like a spiral thread is only a covering of the thick 

 thread, united with the cell and transversely wrinkled sg as 

 to look like a spiral thread (38). The thread itself tapers 



