SCYPHOMEDUSAE 345 



I here include all large, broad, blunt specimens which mostly have been determined 

 previously as dodecabostrycha, uniting them in one group with those properly de- 

 termined as regina. 



Periphylla hyacinthina, Steenstrup 



(Plate XIV, figs. 1-2; Plate XV, figs. 1-3; Fig. 2) 

 Forma dodecabostrycha (including the "Bigelow" stage) 

 28. X. 25. 13° 25' N, 18° 22' W, off Cape Verde.i 4I m. tow-net, 0-900 m. 



Six specimens, distorted, 15-22 mm. diam., with and without "Stielcanal", without gonads, 

 stomach poorly pigmented, lappet zone quite transparent. Together with five dark Periphylla 

 hyacinthina typica. 



St. 288. 21.viii.27. 00° 56' S, 14° 08' 30" W, north of Ascension Island. Young fish trawl, 

 250 (-0) m. 



One specimen, 26 mm. diam., 22 mm. high, broad, with "Stielcanal", with gonads. 

 St. 285. 16. viii. 27. 2° 43' 30" S, 00° 56' 30" W, Gulf of Guinea. 4J m. tow-net, 125-175 (-0) m. 



Two specimens, 16 and 20mm. diam., badly preserved, with "Stielcanal", one with gonads. 

 Together with two dark P. hyacinthina typica. 



St. 276. 5. vii. 27. 5° 54' S, 1 1° 19' E, Gulf of Guinea. Young fish trawl, 150-0 m. 



One specimen, 12 mm. diam., 7 mm. high, stomach only pigmented dark brown, peripheral 

 system wholly transparent, rhopalia without pigment: "Bigelow" stage. 



St. 81. i8.vi. 26. 32' 45' S, 8° 47' W, north of Tristan d'Acunha. 4J m. tow-net, 650-0 m. 



One specimen, badly preserved, 12 mm. diam., flat, with "Stielcanal", stomach only with pig- 

 ment: "Bigelow" stage. 



St. 86. 24. vi. 26. 33° 25' S, 6° 31' E, between Tristan d'Acunha and the Cape of Good Hope. 

 4^ m. tow-net, 1000 (-0) m. 



One specimen, 22 mm. diam., deformed, very flat, pigment faded, without gonads, without 

 "Stielcanal". 



St. 405. 4. vi. 30. 33° 50^' to 34° 16' S, 15' 46' to 15° 02' E, west of the Cape of Good Hope. 

 Young fish trawl, 1200-0 m. 

 Two specimens, typical, in fair condition, 22 mm. diam., 18 mm. high, with long "Stielcanal", 

 stomach very dark, gonads well developed. 



St. loi. 15. X. 26. 33° 50' to 34° 13' S, 16° 54' to 15° 49' E, west of the Cape of Good Hope. 

 4I m. tow-net, 350-400 (-0) m. 



One specimen typical, 22 mm. diam., 20 mm. high, with "Stielcanal", gonads well developed, 

 stomach very dark. 



St. 87. 25. vi. 26. 33° 53' 45" S, 9° 26' 30" E, west of Cape of Good Hope. Young fish trawl, 

 1000 (-0) m. 



Five specimens, only one well preserved, others deformed; three "Bigelow" stages, 5, 7, 12 mm. 

 diam., pigment on stomach only; two dodecabostrycha typica, 22 and 24 mm. diam., 16 and 18 mm. 

 high, one with, the other without "Stielcanal", both with greenish gonads. 



St. 257. 29. vi. 27. 35° 01' S, 10° 18' E, west of Cape of Good Hope. Young fish trawl, 250 (-0) m. 

 One specimen, 25 mm. diam., 18 mm. high, very dark pigment on the stomach, with gonads, 

 irregular warts on central disc and lappets. 



•• Throughout this paper the records of occurrence are arranged according to latitude, from north 

 to south. 



