PLATE XV. 



PAGE 



Figs. 1-9. RossiA owENi, Ball, . . . .114 



Fig. ] . Dorsal view of a female specimen ; natural size. 



Fig. 2. The left dorsal arm of a male, showing the form of hectocotylisation ; 

 magnified 2 diameters. 



Fig. 3. A large sucker from one of the lateral arms of the male, seen from the 



side ; magnified 7 diameters. 

 Fig. 4. Front view of the same sucker ; magnified 7 diameters. 

 Fig. 5. Second right arm of the male ; natural size. 



Fig. 6. Left tentacular club of the female specimen shown in fig. 1 ; very 



slightly enlarged. 

 Fig. 7. A large tentacular sucker ; magnified 20 diameters. 

 Fig. 8. Profile view of the two rings of conical papillas which surround the 



horny ring of a tentacular sucker ; magnified 200 diameters. 

 Fig. 9. A portion of the horny ring of a similar sucker, with the papillary area 



surrounding it ; magnified 200 diameters. 



Figs 10-18. RossiA PATAGONiCA, E. A. Smith, . . 119 



Fig. 10. Third left arm of a male specimen ; magnified 2 diameters. 

 Fig. 11. Second left arm of the same specimen ; magnified 2 diameters. 

 Fig. 1 2. Inner aspect of the third left arm of another specimen ; magnified 2 

 diameters. 



Fig. 13. The outer aspect of the left dorsal arm of the male, showing the form of 



hectocotylisation ; magnified 2 diameters. 

 Fig. 14. Lateral view of an enlarged sucker from one of the lateral arms of the 



male ; magnified 8 diameters. 

 Fig. 15. The left tentacular club; magnified about 5 diameters. 

 Fig. 16. A sucker from the tentacular club; magnified 40 diameters. 

 Fig. 17. Part of the horny ring of a tentacular sucker, with two teeth and the 



adjacent papillary area ; magnified 200 diameters. 

 Fig. 18. Part of the horny ring of a sucker from one of the sessile arms ; with the 



adjacent papillary area ; magnified 200 diameters. 



