i 3 o DISCOVERY REPORTS 



Moser (1925, p. 243) said that there was no ventral radial canal in this species. Actually there is 

 a very short one, measuring about o-i mm. in length, which runs to the circular canal, for the latter 

 lies that distance within the inner boundary of the velum. The first part of the lateral radial canals 

 are somewhat irregular, with a tendency to branch, and run parallel with the circular canal before 

 rising up towards the apex. 



Som. 



Chelophyes contorta (Lens & van Riemsdijk), 1908. 



This species appears to be much more abundant in the West Tropical Indian Ocean than its ally 

 Ch. appendiculata, though they occur side by side at most of the stations. During a recent examination 

 of seven of the bottles of plankton brought back by 

 M.Y. 'Manihine' from the Gulf of Aqaba I have 

 identified young specimens of Ch. contorta and 

 eudoxids of the Endoxia rnsselli type. Since Chelophyes 

 appendiculata was not found in the Gulf of Aqaba it 

 is probable that these eudoxids are of the species 

 contorta, but I have not yet been able to distinguish 

 them from those of Ch. appendiculata. They are both 

 of the type described by me (1932) as Eudoxia 

 russelli. 



This species is not often taken, but it was one of 

 the common species taken by the Great Barrier Reef 

 Expedition; and Russell & Colman (1935) showed 

 that it could not apparently withstand the conditions 

 of the environment in the Barrier Reef lagoon during 

 the period of lower salinity. We find it in the Indian 

 Ocean in some catches associated with Enneagonum 

 hyalinum, one of the three Barrier Reef species that 

 was definitely able to withstand lowered salinity, and 

 so was possibly well suited for life in coastal waters. 



New Indian Ocean records. ' Discovery II ' Stations : 



iS67(i3S°-° m -); i-SI 1 (500-0 m.); 1573 (800-0 m.); 



1 58 1 (50-0, 100-50, 600-0, 1750-600 m.); 1582 



(1900-1850 m.); 1583 (50-0, 100-0, 100-50, 250- 



100 m.); 1584 (50-0, 100-50, 250-100, 500-250 m.); 1585 (500-0, 1400-700 m.); 1586 (50-0, 



250-100,550-0, 1650-950111.); 1587(450-0, 1250-800 m.); 1588(50-0, 100-50, 250-100, 500-200 m.); 



1589 (50-0, 100-50, 250-100, 600-0 m.). 



Diphyes chamissonis Huxley, 1859. 



'Manihine' took D. chamissonis at six stations, fixed at 5, 10, 20, 35 and 40 miles east of Sanganab 

 Lighthouse off Port Sudan, in open nets (366-0 and 183-0 m.), in January 195 1. At Station 6, ten miles 

 east of the Lighthouse, twenty-one nectophores and seven eudoxids were taken; the largest catch. 

 At five stations it was associated with Lensia subtiloides, an association that has been noted before. 



The species was previously recorded from the Red Sea by Leloup (19320). He based his record on 

 one nectophore and an eudoxid in the Zoologisches Museum, Hamburg. He recorded another necto- 

 phore in the same Museum from Ceylon. H.M.S. 'Weston ' found this species (both stages) abundant 

 off Kamaran, Red Sea, in April 1936, at a surface temperature of 28 C. 



Text-fig. 65. Chelophyes contorta. Two views of the 

 anterior nectophore, x 12. Specimen from off Alayu, 

 Gulf of Aden. 



