LEPTOMEDUSAE 35 



The genus Octophialucmm was recently established by me to comprise a number of species pre- 

 viously referred to Octocanna Haeckel, which must be regarded as an altogether doubtful genus. In 

 the same paper I described a new species, O. medium, of which numerous well-preserved specimens 

 were collected by the Danish 'Atlantide ' Expedition near the coast of Nigeria. The present specimen 

 was taken somewhat farther south in the Gulf of Guinea. 



Octophialucium aphrodite (Bigelow 1906) 



1906a Octocanna polynema Maas, p. 95. PI. 3, fig. 10. 



1919 Octocanna aphrodite Bigelow, p. 307. PI. 42, figs. 1-2. 



1928 Octocanna aphrodite Stiasny, p. 212. Text-fig. 2. 



1955 Octophialucium aphrodite Kramp, p. 259. 



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



I specimen. 

 The specimen is 25 mm. in diameter ; the eight radial canals are somewhat irregularly placed. Two of 

 the gonads are retained, they are Unear, in the distal one-fifth to one-fourth of the radial canals. The 

 tentacle bulbs are broadly conical, provided with an adaxial papilla, but without an abaxial spur. All 

 the tentacles are of equal size, and there are no rudiments between them. As a rule there is only one 

 marginal vesicle between successive tentacles, rarely two, each with two concretions. Most of the 

 tentacles are lost, but in a considerable portion of the umbrella margin all are retained; the total 

 number of tentacles is estimated as between 80 and 100. 



Among the five species of Octophialucium known up to now, O. aphrodite is the only species to 

 which the present specimen may be referred with some degree of probability. In this species some 

 young bulbs are usually present between the fully developed tentacles, but the Discovery specimen 

 is so similar to the one described and figured by Maas from Amboina that their identity seems to 

 me very probable. The absence of young marginal bulbs may be due to the specimen being fully 

 developed. The largest specimen observed by Maas was likewise 25 mm. in diameter, with about 

 80 tentacles among which new ones might be inserted, but none are shown in his figure. One or two 

 species of this genus occur off the coasts of India; they are quite distinct from O. aphrodite. 



Distribution. Amboina (Maas); PhiUppines (Bigelow); Java Sea (Stiasny). Now found in the 

 Mozambique Channel between Madagascar and the east coast of Africa. 



Family EiRENlDAE 



Phialopsis diegensis Torrey 1909 



(Text-fig. 7) 

 1909 Phialopsis diegensis Torrey, p. 23. Fig. 9. 



1953 Phialopsis diegensis Russell, p. 333. PL 20, fig. 5. Text-figs. 213-14. 



Occurrence: St. 89. 28. vi. 26. 34° 05' iS" S, 16° 00' 45" E. Net: TYF looo(-o) m. i specimen. 

 St. 100. 2. X. 26. 33° 20' S, 15° 18' E to 33° 46' S, 15° 08' E. Net: TYF 260-310 m. i specimen. TYF 475(^) m. 



I specimen. 

 St. 256. 23.vi. 27. 35° 14' S, 6° 49' E. Net: TYF 850-1100 (-o)m. i specimen. 

 St 276. 5. viii. 27. 05° 54' S, 11° 19' E. Net: TYF i5o(-o) m. 14 specimens. 

 St 282 12 viii. 27. 01° II' S, 05=38' E. Gulf of Guinea. Net: TYF 300(^0) m. 3 specimens. 

 St 697. 12. V. 31. 09° 15' 15" N, 30° 01' 45" W. Net: TYFB 460^ m. i specimen. 

 St 698. 13.V. 31. 12° 21' 45" N, 30° 07' 30" W. Net: TYFB 470^ m. i specimen. 

 St 699 14 v. 31. 14° 27' 15" N, 30° 02' 15" W. Net: TYFB 370-0 m. 6 specimens. 

 St 703 18 X 31. 07° 17' N, 28° 01' 54" W. Net: TYFB 358-0 m. 6 specimens. 



St 714 ^o X 31 35° 09' 30" S, 47° 00' W. Off Montevideo, Uruguay. Net: TYFB 246-^ m. 4 specimens. 

 St' 371 19 V 34 36° 42' 24" S, 36° 04' 24" E. South-east of South Africa. Net: N 100 B 146-0 m. i specimen. 



