O PHI ACT I DAE 263 



St. WS 88. 6. iv. 27. 54° 00' S, 64° 57' W, 118 m. Several specimens. 



St. WS 93. 9. iv. 27. 7 miles S 80° W of Beaver Island, East Falkland Islands, 133 m. 5 speci- 

 mens. 



St. WS 109. 26. iv. 27. 50° 19' S, 58° 28' W, 145 m. I specimen. 



St. WS 210. 29. v. 28. 50° 17' S, 60° 06' W, 161 m. 2 specimens. 



St. WS 221. 4. vi. 28. 48° 23' S, 65° 10' W, 76-91 m. II specimens. 



St. WS 225. 9. iv. 28. 50° 20' S, 62° 30' W, 162-161 m. Several specimens. 



St. WS 228. 30. vi. 28. 50° 50' S, 56° 58' W, 229-236 m. 4 specimens. 



St. WS 231. 4. vii. 28. 50^ 10' S, 58° 42' W, 167-159 m. 2 specimens. 



St. WS 239. 15. vii. 28. 51° 10' S, 62° 10' W, 196-193 m. 3 specimens. 



St. WS 243. 17. vii. 28. 51° 06' S, 64° 30' W, 144-141 m. 5 specimens. 



St. WS 246. 19. vii. 28. 52° 25' S, 61° 00' W, 267-208 m. 4 specimens. 



St. WS 247. 19. vii. 28. 52° 40' S, 60° 05' W, 172 m. 5 specimens. 



St. WS 248. 20. vii. 28. 52° 40' S, 58° 30' W, 210-242 m. 15 specimens. 



St. WS 249. 20. vii. 28. 52° 10' S, 57° 30' W, 166 m. i specimen. 



St. WS 576. 17. iv. 31. 51° 35' S, 57° 50' W, 34-24 m. 2 specimens. 



St. WS 583. 2. v. 31. 53° 39' S, 70° 54' W, 14-78 m. Numerous specimens. 



St. WS 755. 21. ix. 31. 51" 39' S, 57° 39' W, 77 m. Numerous specimens. 



St. WS761. 13. X. 31. 44° 22' S, 63° 02' W, 97 (-0) m. 4 specimens. 



St. WS771. 29. X. 31. 42° 42' S, 60° 31' W, 90 m. 4 specimens. 



St. WS 776. 3. xi. 31. 46° 18' S, 65° 02' W, 107-99 m- 7 specimens. 



St. WS 781. 6. xi. 31. 50° 30' S, 58° 50' W, 148 m. 10 specimens. 



St. WS 782. 4. xii. 31. 50° 28' S, 58° 30' W, 141-146 m. 5 specimens. 



St. WS 785. 6. xii. 31. 49° 25' S, 62° 37' W, 150-146 m. 6 specimens. 



St. WS 804. 6. i. 32. 50° 21' S, 62° 53' W, 143-150 m. 2 specimens. 



St. WS 814. 13. i. 32. 51° 45' S, 66° 40' W, 111-118 m. Several specimens. 



St. WS 823. 19. i. 32. 52° 14' S, 60° 01' W, 80-95 m. I specimen. 



St. WS 824. 19. i. 32. 52° 29' S, 58° 27' W, 146-137 m. 18 specimens. 



St. WS 825. 29. i. 32. 50^ 50' S, 57° 15' W, 135-144 m. Several specimens. 



St. WS 836. 3. ii. 32. 55° 05' S, 67° 38' W, 64 m. 2 specimens. 



St. WS 837. 3. ii. 32. 52° 49' S, 66° 28' W, 98-102 m. 3 specimens. 



St. WS 841. 6. ii. 32. 54° 12' S, 60° 21' W, 109-120 m. 11 specimens. 



St. WS 848. 10. ii. 32. 50° 37' S, 66° 24' W, 115-117 m. 2 specimens. 



St. WS 869. 31. iii. 32. 52° 15' S, 64° 14' W, 187 (-0) m. i specimen. 



6. v. 31. Puerto Bueno. Sarmiento Channel, Magellan Strait, 13 m. 2 specimens. 



7. V. 31. Ringdove Inlet. Wide Channel, Magellan Strait, i specimen. 



The numerous specimens of this well-known species call for no special remarks, 

 excepting two from St. WS 88, which are regenerating the disk that must have been 

 torn away in some way or another. Further, a specimen from St. WS 85 has one arm 

 quite rudimentary, not projecting beyond the disk, although the corresponding part of 

 the mouth frame is normally developed. 



The species very strikingly recalls the North Atlantic O. BalU, Thompson, but is 

 somewhat more robust. Like the latter it may be found between the layers of the 

 parchment-like tubes of Chaetopteriis. It is also frequently found in sponges. It also 

 very much resembles the North Atlantic Ophiopholis aculeata, which is, indeed, a close 

 relation of Ophiactis. 



That the species is not viviparous (or brood-protecting) as suggested by Ludwig 

 {Brutpflege bei Echinodertnen, Zool. Jahrb., Suppl. vii, 1904) I have shown in my paper 



