i6 DISCOVERY REPORTS 



In some of the specimens there is only one rudimentary tentacle between successive fully developed 

 tentacles, in others there are 1-3. Ocelli are not seen, but for comparison I examined specimens from 

 North European waters and found that the ocelli frequently disappear after prolonged preservation. 

 The agreement between the present specimens and those from northern waters is so perfect that I 

 have no doubt of the correctness of the identification. 



Distribution. This species has a very extensive distribution. It is abundant in North-West Euro- 

 pean waters as far north as Iceland. It also occurs in the Mediterranean and on the east coast of 

 North America, and it is further recorded from the coasts of India, Malaya, Japan, the Philippines, 

 and North-East Australia and from Vancouver on the west coast of North America. It has now been 

 found for the first time oflF the west coast of Africa. The occurrence in the neighbourhood of the island 

 of Tristan da Cunha in the middle of the South Atlantic (St. 79) is of particular interest. 



Leuckartiara annexa sp.n. 

 (PI. II, figs. 5, 6) 



Occurrence: St. 439. 21. ix. 30. 30" 12' S, 32° 24' E. Near Durban, South-East Africa. Net: N 100 B iio-om. 



I specimen, the holotype. 

 St. 1576. 25. iv. 35. 14° 42' S, 42° 22' 12" E. Off Mozambique, East Africa. Net: TYFB 400-0 m. i specimen. 



The specimen from St. 439 is chosen as the holotype. Umbrella 1 1 mm. in height, 9 mm. in diameter, 

 regularly dome-shaped with almost perpendicular sides, no apical gelatinous projection, walls fairly 

 thin. Manubrium very large, almost filling the umbrella-cavity, oral lips large and complexly folded, 

 protruding somewhat below the level of the bell margin. The four perradial edges of the stomach are 

 connected with the radial canals along their upper half. The gonads occupy the entire walls of the 

 stomach ; they contain numerous ripe eggs. The gonads are interradial, each consisting of two lateral 

 rows of transverse folds, about ten in each row, directed a little upward in the upper half, and down- 

 ward in the lower half. The two rows of folds are separated by a narrow interradial groove, which is 

 interrupted by the transverse bridge characteristic of Leuckartiara and related genera. In the present 

 species the transverse bridge is placed in the middle part of the stomach wall, at an equal distance 

 from the proximal and from the distal end of the stomach. The radial canals are moderately broad with 

 slightly undulated edges. The ring-canal is fairly narrow. Velum narrow. 



There are four perradial and four interradial tentacles of about equal size, with large, elongated, 

 somewhat laterally compressed basal bulbs ; the base of the bulb clasps the umbrella-margin forming 

 a short abaxial spur. Ocelli are not seen. There are also eight adradial tentacles, much smaller than 

 the others, and of a peculiar shape not seen in any other species of this genus. They have no basal 

 swelling; their proximal part is narrow, adnate to the umbrella-margin and continued rather far 

 upward on the exumbrella, whence a short fiUform tentacle projects upward and outward. Alternating 

 with the tentacles are 16 minute rudimentary bulbs. 



The other specimen (St. 1576) is small, only 3 mm. high and wide. The manubrium is only half as 

 long as the height of the bell cavity. The four interradial tentacles are somewhat smaller than the 

 perradial. Some of the adradial tentacles are still quite small, the others are similar to those in the 

 adult specimen. 



Whereas the perradial and interradial tentacles of this medusa resemble the tentacles of most other 

 species of Leuckartiara, the configuration of the adradial tentacles separates it from all other species 

 and justifies the erection of a new species. 



