NEREIDAE 109 



length beyond the end of the upper dorsal languet, and the ventral cirrus is the same 

 length as the ventral languet. The posterior feet differ from the anterior only in the 

 more slender and pointed character of the languets. 



The dorsal bristle bundle contains homogomph spinigers, the upper ventral bundle 

 homogomph spinigers and heterogomph falcigers and the lower ventral bundle hetero- 

 gomph spinigers and falcigers. 



The body ends in a pair of long pygidial styles. 



Remarks. This species differs from Leptonereis laevis, Kinberg, from Guajaquil in 

 the shape of the head, the greater size of the eyes and also, as far as I can judge, from 

 his figure, in the shape of the feet. This species is recorded by Ehlers from Kaiser 

 Wilhelm II Land. 



The examples from off Tristan da Cunha are doubtfully of this species. They are 

 small and possibly young specimens, measuring about 15 mm. by 2 mm. including the 

 feet. The eyes are relatively rather larger than in the typical forms and the anterior pair 

 is crescentic : the tentacles are also relatively much larger, being about as long as the 

 prostomium. The tentacular cirri reach back to the 15th chaetiger. The languets of 

 the feet are relatively longer and narrower : the intermediate dorsal languet is reduced 

 to a very small process : the anterior face of the ventral chaeta sac ends in a kind of 

 rounded lobe and the posterior lip is carried out into a long digitiform process as long 

 as the languets. The interior of the pharynx is coloured dark red and I can find no 

 trace of paragnaths. I cannot clearly separate these examples from L. loxechini, of 

 which they may be young forms. 



A number of the specimens from St. 170 had built tubes along the stems of a Hydroid 

 (Sertularia sp.). 



At St. 123, off South Georgia, was found an epitocous male: the head and first seven 

 chaetigers are modified in the usual manner, the 8th to the 20th feet are of the atokous 

 form, and from the 21st onwards they assume the true heteronereid shape, as shown 

 by the figure (Fig. 38). 



Nereis (Eunereis) hardyi, n.sp. 



St. WS 86. 3. iv. 27. 53° 53' 30" S, 60° 34' 30" W. From 53° 53' 00" S, 60° 37' 00" W to 

 53° 54' 00" S, 60° 32' 00" W. 151-14701. Gear OTC. Bottom: sand, shell and stones. Eight 

 specimens. 



St. WS 88. 6. iv. 27. 54° 00' 00" S, 64° 57' 30" W. From 54° 00' 00" S, 65° 00' 00" W to 

 54° 00' 00" S, 64° 55' 00" W. 118 m. Gear OTC. Bottom: sand, shell and stones. Eight specimens. 



St. WS 90. 7. iv. 27. 13 miles N 83° E of Cape Virgins Light, Argentine Republic. From 

 52° 18' 00" S, 68° 00' 00" W to 52° 19' 30" S, 67° 57' 00" W. 82-81 m. Gear OTC. Bottom: fine 

 dark sand. Seven specimens. 



St. WS 93. 9. iv. 27. 7 miles S So° W of Beaver Island, West Falkland Island. I'Vom 

 51° 51' 00" S, 61^ 30' 00" W to 51" 54' 00" S, 61" 30' 00" W. 133-130 m. Gear OTC. Bottom: 

 grey sand. Three specimens. 



Description. Nearly all the adult specimens are incomplete. The largest measures 

 70 mm. by 3 mm. without the feet and has about 65 chaetigers. There is a young. 



