HYPERIIDAE 281 



7. St. 36. South Georgia (0-5 m.). 21 ?9 14-16 mm. (half sample). 



8. ditto (90-0 m.). Many $$ 13-17 mm. 



9. St. 41. South Georgia (100-50 m.). 17 $$ 15-17 mm. (half sample). 



10. ditto (250-150 m.). 10 $? 13-17 mm. (half sample). 



11. St. 47. Falklands. 4 $$ 17-20 mm., 6 $$ 11-14 mm. 



12. St. 49. Falklands. 1 $ 20 mm. 



13. St. 51. Falklands. 8 $$ 10-13 mm., 1 $ 19 mm., many juv. 2-5-4-5 mm. 



14. St. 71. South-west Atlantic. 9 $$ 12-15 mm., 1 $ 20 mm. 



15. St. 72. South-west Atlantic. 2 ?? 14 and 15 mm. 



16. St. 78. South Atlantic. 2 $<$ 15 and 17 mm. 



17. St. 101. South-east Atlantic (13 10-1410 m.). 1 ^ 11 mm. 



18. St. 116. Bouvet Island. 2 ?$ 16 mm. (1 ovig.). 



19. St. 120. South Atlantic. 3 <$£ 13-14 mm. 



20. St. 125. South Georgia. Many juv. 3-6 mm. 



21. St. 128. South Georgia. 4 juv. 4-5 mm. 



22. St. 132. South Georgia. 1 ? 17 mm., 1 juv. 10 mm. 



23. St. 136. South Georgia. Many juv. 5-9 mm. 



24. St. 137. South Georgia. 2 $$ 16 mm., 1 ovig. $ 20 mm., a lot juv. 6-9 mm. 



25. St. 151. South Georgia. 7 $? 8-12 mm. 



26. St. 180. Palmer Archipelago (160-330 m.). 19 $$ 14-16 mm. 



27. St. 208. South Shetlands. 10 $? 16-17 mm. 



28. St. 239. South-west Atlantic. 20 $$ 17-25 mm. 



29. St. WS 38. South Georgia. 1 ovig. $ 16 mm., 33 juv. 6-5-10 mm. 



30. St. WS 69. Falklands. 1 ovig. $ 25 mm. 



31. St. WS 72. Falklands. 1 ? 9 mm. 



32. St. WS 89. South America. 16 ?? n-i6mm. 



33. St. WS 95. Between Falklands and South America. Many $$ 14-17 mm. 



34. St. WS 99. Falklands. Many, more or less damaged, from stomach of Mer luccius sp. 



35. St. MS 36. South Georgia. 2 $$ 16 mm. (1 with embryos). 



36. St. MS 39. South Georgia. 2 $? 16 mm. (1 with embryos). 



Remarks. There are about 300 ?? and only 6 <3<3 in the present collection (cf. 

 Vosseler, p. 87). Both forms compressa and bispinosa occur together, but the latter seems 

 to be slightly more abundant, and also to prefer higher latitudes, not being found north 

 of 41 ° S, whereas the former was found about 34 S (off Cape Town). This points to 

 the same conclusion as Vosseler drew (p. 86), based on a single specimen found at 7 S, 

 that f. compressa is more eurythermous than f. bispinosa. 



Both sexes of both forms are present. On no occasion were the two sexes taken to- 

 gether. The oS measure 11-17 mm.; ovigerous $? 16-20 mm.; the largest $ is 25 mm. 



The largest specimens are mostly f. compressa with the dorsal teeth and the lateral 

 projections on epimera 5 and 6 in 9 very well developed. 



Breeding takes place in the southern spring and summer, ovigerous ?? being caught 

 in November, December and February, and on two occasions (nos. 1 and 2) ?$ with 

 embryos in October. 



The present collection affords no evidence of a day-night bathymetrical migration. 

 Specimens were obtained at night only in the upper layers (about 100-0 m.); but this 

 is negative evidence, because on these occasions no deep hauls were made, or only 

 vertical hauls, and vertical hauls are not productive. On the other hand, specimens 



D V 36 



