128 



Annals of the Carnegie Museum. 



groove. The scoop or terminal process of the anal fin, if movement 

 of the handle or pedicle is possible, could be raised to receive the sperm- 

 atozoa as they issue from the end of the trough. By the usual move- 

 ments during copulation they could then be placed on the genital 

 papilla of the female. Since the living fish has not been observed, 

 these remarks are naturally conjectural. 



Views of the terminal process of the intromittent organ from both 

 above and below are shown in Figs. lo and ii. It was suggested that 



Fig. 10. Fig. ii. 



Fig. 10. Phallotorynus fasciolatus Henn. View from above of terminal portion 

 of anal, detached from the pedicle. X i8. No. 3753a, Carnegie Museum. 

 Jacarehy, Sao Paulo, Brazil. 



Fig. II. View from below of same object shown in Fig. 10. X 18. 



this might be an elaborate device for enclosing the spermatozoa, 

 so ewhat analogous to the egg case of the skate. Accordingly one 

 of them was decalcified, imbedded, and cut into very thin sections 

 and stained with iron-alum haematoxylin. This procedure showed 

 conclusively that the terminal process is not a sperm case, but is an 



Fig. 13. 



Section through center of terminal 



Fig. 12. 



Fig. 12. Phallotorynus fasciolatus Henn. 

 portion of anal. X 30. 



Fig. 13. Do. Section through posterior portion of terminal part or scoop of 

 the anal. X 30. 



