NEPHTHYDIDAE 



113 



St. MS 15. 17. ii. 25. East Cumberland Bay, South Georgia. 3 miles SW of Merton Rock 

 to 2| miles NNW of Dartmouth Point, iiom. Gear DS. One specimen. 



St. MS 68. 2. iii. 26. East Cumberland Bay, South Georgia. 17 miles S | E to 8J- cables 

 SE X E of Sappho Point. 220-247 m. Gear NCS-N and NRL. Fifteen specimens. 



Remarks. There is very wide variation in the shape of the feet in this species on a 

 ground plan of a rounded upper dorsal lamella, a lower dorsal lamella that is always 

 gathered to a point at its apex and a lanceolate ventral lamella. I cannot discover any 

 correlation between the size of the individual and the degree of the development of 

 the lamellae: in the larger specimens the lamellae are usually relatively small, and in 

 individuals of about the same size there are wide differences in the size and shape of 

 the lamellae. St. 143, off South Georgia, yielded the largest example, measuring 

 200 mm. by 13 mm. without the feet. 



From St. 173 (South Shetlands) there came four specimens in every way typical of 

 this species, but the lower border of the ventral lamella is serrated. They are quite 

 distinct from A'^. serratifolia, Ehlers, and indistinguishable in every other character 

 from A'^. macrura. I do not regard these serrations as even of varietal value. St. MS 68 

 (South Georgia) yielded a number of young examples, measuring about 10 mm. by 

 I mm. including the feet. 



Nephthys lyrochaeta, Fauvel. 



Fauvel, 1902, p. 72, text-figs. 9 and 10. 



Augener, 1918, p. 160, pi. ii, fig. 12; pi. iii, fig. 59. 



St. 279. ID. viii. 27. Off Cape Lopez, French Congo. From 8-5 miles N 71^ E to 15 miles N 24° E 

 of Cape Lopez Light. 58-67 m. Gear OTL. Bottom: mud and fine sand. Four specimens. 



T2mm 



t2 



mTn 



-K) 



O 



a 



Fig. 40. Nephthys lyrochaeta. 

 a. Fifteenth foot. b. Thirty-fifth foot. 



15 



