TOMOPTERIDAE 87 



such that, while it allows the presence of the apical chromophil glands to be seen, it 

 renders impracticable the much more intensive examination necessary for the discovery 

 of the hyaline glands. It therefore seems reasonable to suppose that T. eschscholtzi is 

 a T. septentrioualis in which the hyaline glands were not or could not be seen. It is 

 also not unlikely that the distinctness of the hyaline glands in T. septetitrionalis is 

 dependent on their functional activity. The alternative is that I should attribute all 

 the examples that for reasons of preservation, glandular activity, etc., have no apparent 

 hyaline glands to T. eschscholtzi and the rest to T. septentrmnalis, a most unsatisfactory 

 procedure in view of the fact that in occurrence, habitat and structure they are otherwise 

 indistinguishable. 



This is a considerably smaller species than T. carpenteri together with which it occurs 

 in large numbers around South Sandwich. It is noteworthy that whereas T. carpenteri 

 appears to be equally common round South Georgia, from the present collection only 

 a single T. septentrioualis was found there. The anterior pair of appendages was not 

 present in any of the specimens. 



Tomopteris (Tomopteris) cavallii, Rosa. 



Fauvel, 1923, p. 222, fig. 84 a. 

 Benham, 1929, p. 197, pi. ii, figs. 27-28. 



St. 89. 28. 6. 26. 34° 05' 15" S, 16° 00' 45" E. 1000 (-0) m. Gear TYF. Four specimens. 



Remarks. In two of these examples, measuring about 12 mm. by 4 mm. including 

 the feet, a pair of small anterior chaetigerous appendages is present: they are feebly 

 developed and probably about to disappear: Fauvel in his diagnosis writes, " i<"^ appen- 

 dice setigere manque, meme chez les jeunes." There is a pair of large brown eyes at 

 the centre of two ganglionic masses. There are no hyaline glands. The gonads are 

 situated in the dorsal ramus of the foot but in a ripe female some of the ova had 

 penetrated into the ventral ramus also. 



Tomopteris (Tomopteris) nisseni, Rosa. 



Fauvel, 1923, p. 222, fig. 83 e,g. 



St. 78. 12. vi. 26. 35° 18' 00" S, 19° 01' 10" W. 1000 (-0) m. Gear TYF. Two specimens. 

 St. 87. 25. vi. 26. 33° 53' 45" S, 9° 26' 30" E. 1000 (-0) m. Gear TYF. Two specimens. 

 St. 89. 28. vi. 26. 34° 05' 15" S, 16° 00' 45" E. 1000 (-0) m. Gear TYF. Three specimens. 

 St. 267. 23. vii. 27. 24° 31' 00" S, 12° 15' 30" E. 450-550 (-0) m. Gear TYF. One specimen. 

 St. 282. 12. viii. 27. 1° 11' 00" S, 5° 38' 00" E. 300 (-0) m. Gear TYF. One specimen. 

 St. 288. 21. viii. 27. 00° 56' 00" S, 14° 08' 30" W. 250 (-0) m. Gear TYF. One specimen. 

 St. 293. 24. viii. 27. 4° 18' 15" N, 16° 51' 00" W. 100-120 (-0) m. Gear TYF. One specimen. 



Remarks. The arrangement of the hyaline glands is very variable in this species (see 

 Malaquin and Carin, 1922, p. 36). In a number of the examples from the various stations 

 the pinnules are frayed out in a curious way, a condition probably due to improper 



