systematic report 69 



Occurrence : 



. 71. 30. v. 26 (day). Open ocean north of Falkland Is., 200o(-o) m., 1 imm. <$. 



78. 12. vi. 26 (day). Mid-Atlantic, west of Cape Town, iooo(-o) m., 5 adult $$, largest 17 mm., 3 juv. $$; 

 7 adult 99, largest 17-5 mm., 2 juv. 99, fragments. 

 . 81. 18. vi. 26 (day). North of Tristan da Cunha, 65o(-o) m., 1 very damaged 9, doubtfully. 

 . 83. 21. vi. 26 (night). North-east of Tristan da Cunha, 65o(-o) m., 1 adult 9, I4"S mm. 

 . 86. 24. vi. 26 (day). Open ocean, west of Cape Town, iooo(-o) m., 1 damaged 9. 

 . 87. 25. vi. 26 (day). West of Cape Town, iooo(-o) m., 6 adult $$, largest 16-4 mm., 8 juv. $$, 6 adult 99, 



largest 17-5 mm., 3 juv. 99- (Colour note, 'Pinkish red throughout — eyes black'.) 

 . 89. 28. vi. 26 (day). Off Cape Town, iooo(-o) m., 2 adult $$, 20 mm., 2 92, 15 mm. 

 . 100. 2/3. x. 26 (night). West of Cape Town, 475(-o) m., 2 juv., 5 mm., probably rostrata. 

 . 100B. 3/4. x. 26 (night). West of Cape Town, 1000-900 m., 3 adult 99, largest 17 mm. 

 . 100C. 4. x. 26 (day). West of Cape Town, 2500-2000 m., 2 juv. and posterior end of large 9- 

 . 100 D. 2. x. 26 (day). West of Cape Town, 675-625 m., 1 badly damaged specimen. 

 . 101. 14. x. 26 (day). West of Cape Town, 1410-1310 m., posterior end of large <J. 

 • 256. 23. vi. 27 (day). West of Cape Town, noo-85o(-o) m., 1 adult <£, 17-5 mm., 3 juv. cJ<J, 6 adult 99, largest 



17 mm., 3 juv. 99- 

 . 267. 23. vii. 27 (night). North-west of Angra Pequena, 550~45o(-o) m., 3 very small juv. probably rostrata. 

 . 405. 4. vi. 30 (day). Off Cape Peninsula, 1200-0 m., 4 $<$, largest 18 mm., 2 $9, larger 16-5 mm. 

 . 407. 12. vi. 30 (day). South-west of Cape Town, 950-800 m., 2 adult SS, 17 mm., 2 99, 17-5 mm. 

 . 413. 21. viii. 30 (day). West of Saldanha Bay, South Africa, 1600-1000 m., 2 99, larger 17 mm. 

 . 663. 5. iv. 31 (day). East-north-east of South Georgia, 500-250 m., 1 juv., bad condition. 

 .671. 22. iv. 31 (night). Open ocean, west of Gough Island, 1 000-0 m., 1 adult 9, i7'8 mm. 

 . 673. 24/25. iv. 31 (night). West of Tristan da Cunha, 1 500-1 100 m., 1 badly damaged 9- 

 . 942. 31. viii. 32 (night). East of Cook Strait, New Zealand, 350-110 m., 2 imm. <$<$, 1 imm. 9- 

 . 1566. 9. iv. 35 (night). North of Prince Edward Is., 1350-0 m., 2 juv. 99- 



. 1568. 11. iv. 35 (night). South of South Africa, 1400-0 m., 1 juv. <$, 1 adult 9, i4'4 mm., 1 juv. $. 

 . 1602. 27. x. 35 (night). West of South Africa, 470-300 m., 1 imm. <£, 12-8 mm. 

 . 1604. 29. x. 35 (night). West of South Africa, 620-500 m., 1 imm. <£, 14 mm. 



1606. 31. x. 35 (night). West of Orange River estuary, South Africa, 600-500 m., 6 juv. and fragments. 



1753. 27. iv. 36 (day). South Indian Ocean, 2900-1400 m., 2 imm. 92, !2 mm. 



1802. 16. ix. 36 (day). Off Cape Town, 1000-750 m., 1 imm. 9, 12-5 mm. 



2035. 7. iv. 37 (day). Off Cape Town, 950-750 m., 1 adult 9, 16-2 mm. (Colour note, 'deep orange'.) 



2038. 19. iv. 37 (day). West of Cape Town, 1200-850 m., 1 imm. 9, 12 mm. (Colour note, 'brilliant red'.) 



WS 1 10. 26. v. 27 (dusk to dark). Off South Georgia, 980-750 m., 1 large adult 9, 20 mm., 1 juv. 9- 



WS 582. 30. iv. 31 (day). Magellan Strait, no m., 1 imm. 9, 15 mm. 



WS 748. 16. ix. 31 (night). Magellan Strait, 30o(-o) m., 74 g<$, 134 99, largest 21 mm., 20 juv.; second tube: 

 1 2 small juv. 



WS 749. 18. ix. 31 (day). Magellan Strait, 4o(-o) m., 1 9, 18 mm., fragments of imm. <$ and 99- 



WS 839. 5. ii. 31 (night). South-west of Falkland Is., 503-534 m., 1 adult 9, 20 mm. 



WS 976. 6. iii. 50 (day). West of Walvis Bay, 750-500 m., 1 juv. in very bad condition (doubtfully). 



WS 977. 6/7. iii. 50 (night). West-north-west of Walvis Bay, 750-500 m., 1 juv. $, 10 mm. 



WS 978. 7. iii. 50 (day). West-north-west of Walvis Bay, 750-500 m., 3 99, 9'4~i2 mm. 



WS 986. 10. iii. 50 (day). West of Spencer Bay, South-west Africa, 1000-750 m., 1 adult S, 14-5 mm. 



Remarks. The literature of B. rostrata has been confused by the fact that Illig (1930, p. 414), when 

 more fully describing the species which he had founded in 1906, was evidently dealing with material 

 which included more than one species. 



Tattersall (1951, p. 57) drew attention to the striking differences between the males and females in 

 Illig's description and figures, and concluded that these differences were not sexual, but specific. 

 He accepted Illig's female as the type for B. rostrata and suggested that the males should be referred 

 to another species. 



