SABELLIDAE 203 



Genus Euratella, Chamberlin 



Euratella puncturata (Augener). 



Demonax puncturatus, Augener, 1918, p. 576, pi. vi, figs. 170-171, text-fig. 102. 



St. 2. 17. xi. 25. Clarence Bay, Ascension Island, Catherine's Point and CoUyer Point. Shore 

 collection, from buoy. Five specimens. 



Remarks. Of these examples only one is complete, and this measures 7 mm. for the 

 body and 3 mm. for the gills. There are only five thoracic chaetigers. The body is 

 slender and flattened ventrally: there are 11 branchial filaments to each branchial 

 lobe. These have about six bands of brown pigment. According to Augener, there are 

 no eyes, but I am inclined to regard the paired pigment spots on the outer surface of 

 the filaments as rudimentary eyes. There is a very distinct pigment band across the 

 branchial lobes. Dorsally there is a pair of pigment spots at the base of the collar, and 

 ventrally a pair below the collar lappets. There is a distinct spot in every segment 

 between the rami of the feet. 



The branchial membrane extends for about a quarter of the length of the gills; and, 

 as Augener points out, the rachis of the filaments is thickened in places on its outer 

 surface, suggesting rudimentary dorsal stylodes. 



There is a pair of palps equal in length to the branchial membrane. The collar is 

 widely open dorsally, slightly notched at the sides and forms two triangular lappets 

 ventrally. The faecal groove is very indistinct. The bristles and hooks correspond so 

 closely to Augener's description and figures that there is nothing I can add. 



Augener attributed this species "mit einiger Reserve" to Demonax, Kinberg. On 

 the other hand, Johansson, who has examined Kinberg's Sabellid types, claims that 

 Demonax has pickaxe chaetae in the ventral tori of the thorax. It therefore cannot 

 belong to Demonax. 



With its bristles of two kinds, neither kind spatulate, both in thorax and abdomen, 

 and its avicular hooks unaccompanied by pickaxe chaetae in the thorax, it seems to be 

 generically allied to Laonome salmacidis, Claparede (v. Fauvel, 1927, p. 323, fig. 112 s-x), 

 which is the type species of Chamberlin 's Euratella. 



In the type species, however, the abdominal capillary bristles differ from those of 

 the present species and are said to occur in the terminal segments only. 



Sub-family FABRICIINAE 



Genus Euchone, Malmgren 

 Euchone pallida, Ehlers. 



Ehlers, 1908, p. 159, pi. xxi, figs. 10-15; P'- ^i> %s- ^~4- 

 Benham, 1927, p. 139, pi. iv, figs. 126-130. 



St. 39. 25. iii. 26. East Cumberland Bay, South Georgia. From 8 cables S 81° W of Merton 

 Rock to 1-3 miles N 7° E of Macmahon Rock. 179-235 m. Gear OTL. Bottom: grey mud. Three 

 specimens. 



26-a 



