470 DISCOVERY REPORTS 



other Bicellariellidae except for their blunt mandible. The zooecia agree very exactly 

 with those of the genotype. There are no ovicells. It is possible that this specimen 

 actually belongs to Erymophora gracilis, but, in the absence of ovicells and of any in- 

 formation about the locality, this point must remain unsettled. The only samples of the 

 Atlantic bottom fauna taken by the ' Terra Nova ' came from 229 m. and 73 m. off Brazil 

 (Sts. TN 38 and TN 42), whereas the type-specimen of E. gracilis was taken in 1295- 

 1299 m. (707-710 fm.) off south-west Ireland. 



E. gracilis was described as a species of Brettia, but the zooecia not only differ from 

 those of Brettia in the presence of avicularia, but also in being well calcified and having 

 a cryptocyst and helmet-shaped ovicell. It is thus unlikely to belong to Corynoporella 

 Hincks (1888, p. 215), which is described as resembling typical Brettia except for the 

 presence of avicularia. I have not seen a specimen of the genotype Corynoporella tenuis. 

 Erymophora gracilis is further distinguished from Corynoporella by its branching. The 

 lateral origin of the branches is not in itself a valid distinction, Notoplites tenuis var. uni- 

 serialis, for example, forms branches both by lateral buds and by paired distal buds (see 

 p. 351), but the tubular connexion is a peculiar feature. The origin of the tube from the 

 lateral zooecium might be compared to the origin of a rootlet, though there is unrestricted 

 communication between the cavity of the zooecium and that of the tube. It is not, how- 

 ever, just a rootlet attached to another zooecium by its tip, for the connexion between 

 its other end and the proximal zooecium is like that between two zooecia, so that it 

 appears as if the parent zooecium had produced two distal buds. Such an arrangement 

 is difficult to interpret, but as it is found in Erymophora gracilis, E. klugei and in the 

 unnamed Terra Nova specimen, it appears to be a character of some importance. 



Allantopora Lang (1914, p. 436), the membraniporine genus to which Erymophora 

 gracilis has been compared (Harmer, 1926, p. 225, and footnote, p. 198), differs in its 

 branching, is not known to have avicularia, and is encrusting. 



1. Erymophora gracilis (Nichols). 



Brettia pellucida var. gracilis Nichols, 191 1, p. 7, pi. i, figs. 1-3. 



Station distribution. Not represented in the Discovery collections. 



Geographical distribution. 5i°is'N, ii°47'W, 707-710 fm., off south-west Ireland 

 (Nichols). 



Part of Nichols's type material, unfortunately without ovicells, is in the British 

 Museum (11 . 10. 1 .851). I have nothing to add to Nichols's description. The Terra 

 Nova specimen described above (Fig. 56 A-C) may belong to this species. 



2. Erymophora klugei sp.n. 



Brettia sp. Kluge, 1914, p. 642, text-fig. 24. 

 ? Brettia longa (part) Waters, 1904, pi. i, fig. za. 

 Station distribution. Antarctic: Weddell Quadrant, St. 1948. 



Geographical distribution. Near Elephant Island (Discovery); Bellingshausen Sea ? (Waters); 

 Wilhelm II Land (Kluge); Oates Land (Terra Nova). 



Holotype. Kluge's figured specimen, which I have not seen, becomes the holotype. 



