BY E J. GODDARD. 787 



The spermiducal gland is much simpler than that of A. notabilis, 

 but is arranged in general on the same plan. It is in the form 

 of an " I" the vertical portion being short and most posterior in 

 position, leaning in the direction of the anterior wall of the segment 

 but not projecting for any great distance beyond the base of the 

 penis. The spermiducal gland, as a whole, lies on the inner side 

 of the penis. After the junction of the spermiduct with the 

 gland, the atrium consequently formed shows no great diminution 

 in size or change in structure. This common chamber runs 

 from the junction with the spermiduct, upwards for a short 

 distance, and then turns posteriorly to the inner side of the penial 

 sac, and passes into a tubule which enters the penis. 



The spermathecse, which were found in the paired condition in 

 A. notabilis, are here represented by a single structure which 

 passes transversely across the body, dorsally to the alimentary 

 canal, and consists of a dilated chamber at each lateral extremity, 

 connected by a narrow passage. The fusion, which was indicated 

 in A. 7iotabilis, is here complete, but, unlike the former species, 

 no asymmetry is indicated. The spermatheca passes, at the 

 latero-ventral portion of each lateral dilated chamber, into a duct 

 which runs down towards the ventral surface of segment xiv., 

 and, after turning on itself in a short coil, passes through the 

 septum separating segments xiii. and xiv. It then turns on itself 

 to run obliquely upwards to a thin-walled sac, which is situated 

 in the antero-dorsal region of segment xiii. — the ovisac — into 

 which it opens. The general course of the duct agrees exactly 

 with that of A. notabilis. The wall of the spermatheca consists 

 of a single layer of cubical cells, with centrally placed nuclei and 

 granular protoplasm. The wall of the duct consists of a single 

 layer of cells, about eight completing the investment of the very 

 minute lumen. There is probably a very faint circular muscula- 

 ture round this epithelium, but it is very indistinct. 



Female organs. — The ovaries are situated in segment xii., but 

 no organ could be seen in situ. Masses of detached ova were 

 seen in the cavity of this segment. The oviduct agrees in 

 character with that of A. notabilis. 



