ANTHOMEDUSAE 9 



Bougainvillia macloviana Lesson 1843 



Occurrence: St. 58. 19. v. 26. Port Stanley, East Falkland Islands. Net: N 70 H, 5-0 m. 200 specimens. 



St. 719. 13. xi. 31. 54" 00' S, 60° 00' W. Net: N lOO B, 109-0 m. 1 1 specimens. 



St. Sparrow Cove, Falkland Islands. 19. x. 34. 4-6 m. 5 specimens. 



St. 1896. 27. xi. 36. 49° 55' 06" S, 62° 05' W. Net: N 70 B, 128-0 m. i specimen. 



St. 1897. 27. xi. 36. 49" 55' S, 63° 09' 24" W. Net: N 100 B, 151-0 m. 5 specimens. 



St. WS. 798. 20. xii. 31. 47° 31' 30" S, 65° 02' W. Net: NCS-T, 49-66 m. i specimen. 



All these localities are round or near the Falkland Islands. 



The specimens taken in October, November and December are 7-16 mm. in diameter. Among the 

 numerous specimens taken in May 1926 (St. 58) a few measure 9 mm. in diameter, but most of 

 them are small, down to i mm. 



Distribution. Widely distributed and very common in subantarctic and antarctic seas, probably 

 circumpolar. Moreover, the medusa has been found in the south-eastern part of the North Sea; this 

 occurrence is undoubtedly due to the transportation of the hydroid by ships. 



Bougainvillia platygaster (Haeckel 1879) 

 (Plate III, figs. 1-6, text-fig. i) 



1879 Hippocrene platygaster Haeckel, p. 91. 



1910 Bougainvillia platygaster Mayer, p. 165. 



1912a Bougainvillia niobe VanhofFen, p. 359. 



1938a Bougainvillia platygaster Thiel, p. 299. 



19486 Bougainvillia niobe Kramp, p. 4. 



1951a }Bougainvillia carolinensis y^nnucci, p. 78; 195 16, pp. m, 114, 116. 



Occurrence: St. 680. 30.iv. 31. 22° 36' S, 30° 01' 30" W. Net: TYFB 260-0 m. 14 specimens. 



St. 683. 2. V. 31. 16° 48' S, 29° 55' W. Net: TYFB 290-0 m. i specimen. 



St. 688. 5. V. 31. 09° 26' 30" S, 29° 50' 30" W. Net: TYFB 450-0 m. i specimen. 



St. 708. 23. X. 31. 10'' 20' 36" S, 34° 54' 42" W. Net: TYFB 208-0 m. i specimen. 



St. 709. 24. X. 31. 14° 01' 24" S, 36° 30' 42" W. Net: TYFB 216-0 m. 5 specimens. 



St. 1374. 24. V. 34. 31° 46' 36" S, 29° 46' 18" E. Net: TYFB 230-0 m. 3 specimens. 



St. 1375. 25. V. 34. 34° 30' 48" S, 26° 19' E. Net: TYFB 210-0 m. 3 specimens. 



St. 1574. 23. iv. 35. 21° 44' 36" S, 40° 33' 42" E. Net: TYFB 600-0 m. i specimen. 



St. 1578. 26. iv. 35. 11° 25' 12" S, 42° 03' 06" E. Net: TYFB 500-0 m. i specimen. 



St. 1580. 27. iv. 35. 08° 44' 36" S, 41° 50' 18" E. Net: TYFB 450-0 m. i specimen. 



St. 1581. 28. iv. 35. 07° 42' 06" S, 44° 14' 06" E. Net: TYFB 600-0 m. 2 specimens. 



The distribution of Bouganvillia platygaster is shown in Text-fig. i. Stations 680-709 are off the 



east coast of Brazil; stations 1 374-1 581 are off the southern part of the east coast of Africa between 



Port Elisabeth and Zanzibar. Three of the specimens (Stns 680 and 683) are infested by parasitic 



narcomedusa-larvae (see p. 90). 



The species Bougainvillia platygaster has been observed only on few occasions, and its identity has 

 been doubted. Haeckel found it during his stay in 1866 in the Canary Islands. While preparing his 

 monograph Das System der Mediisen (1879) he borrowed the whole collection of medusae from the 

 Zoological Museum of Copenhagen, together with a detailed list of localities and other information, 

 and this list is still in our possession with Haeckel's hand-written identifications of the species. 

 Many of the specimens are likewise still available in our collections, and among them three specimens 

 of B. platygaster from the following two localities, both mentioned in Haeckel's book: 



(i) Two specimens collected by Andrea in 1869 at 25° S, 27° W, south of the Brazilian island 

 of Trinidad. In one specimen the manubrium is lost, but the tentacles are retained. The other 



