ACOETIDAE 69 



The dorsal (Fig. 19, c) bristles are numerous and exceedingly fine capillaries, which 

 appear to be quite smooth, but under a very high magnification minute serrations 

 (Fig. 19, d) can be detected on one side of the blade. 



The ventral bristle bundle is contained between two vertical lips, the anterior of 

 which is produced into an extremely long cirriform process, almost reaching to the tips 

 of the bristles. The ventral bristles (Fig. 19, e), although coarser than the dorsal, are 

 very long and slender, and end in fine hair-like tips. They carry rows of delicate closely 

 set teeth. The ventral cirri are short, just reaching to the lip of the chaeta sac. The 

 example (Fig. 19,/) is a ripe female, filled with ova. 



Remarks. I find this specimen very puzzling. It was apparently obtained from the 

 bottom of the sea, and the head and the sturdy character of the body are not those of 

 a pelagic form: on the other hand, the large inflated-looking cirrophores and the long 

 very delicate bristles recall the free-swimming species. Furthermore, I know no genus 

 in which the bristles of both rami of the foot are fine capillaries, the dorsal almost 

 smooth and finer than the ventral. I have provisionally attributed it to Antinoe on 

 account of its ventral bristles, for I am unwilling to base a new genus on an incomplete 

 specimen. 



The example is full of eggs, and I think it very possible that it is undergoing some 

 sexual change, involving the temporary adoption of the pelagic habit. 



Family ACOETIDAE 



Genus Eupanthalis, Mcintosh 



Eupanthalis tubifex (Ehlers). 



Euarche tubifex, Ehlers, 1887, p. 54, pi. xii, figs. 1-7; pi. xiii, fig. i. 

 Eupanthalis tubifex, Augener, 19 18, p. 125, pi. ii, fig. 20. 



St. 274. 4. viii. 27. Off St Paul de Loanda, Angola. From 8° 40' 15" S, 13° 13' 45" E to 

 8° 38' 15" S, 13' 13' 00" E. 64-65 m. Gear OTL. Bottom: grey mud. One specimen. 



Remarks. A large example, measuring 295 mm. by 10 mm. including the feet, of 

 this species, described by Ehlers from the West Indies and by Augener from the 

 Belgian Congo. Fauvel regards it as synonymous with the Mediterranean E. kinbergi, 

 Mcintosh, but this seems to me doubtful. Both in my specimen and in that figured 

 by Ehlers the bristles are extremely short, while in all the Mediterranean examples 

 seen by me they are fairly long and prominent. 



Genus Polyodontes, Renier 



Polyodontes mortenseni, Monro. 



Monro, 1928, p. 569, figs. 19-24. 



St. 279. 10. 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. One specimen. 



