40 S 



DISCOVERY REPORTS 



The specimen from Challenger St. 332 recorded by Busk as Cornucopina navicularis 

 differs from the type-specimen of that species, see above, and closely agrees with 

 C. rotundata, differing only in the absence of the small frontal avicularium, and in 

 having two instead of three terminal spines on the spine-bearing process which, besides 

 the two terminal spines, carries one spine at a short distance from the tip and a fourth 

 spine part way between the third spine and the base of the process. As in Kluge's 

 figure, there is also a spine on the basal surface of the zooecium near the point of origin 

 of the spine-bearing process and another near the origin of the daughter-zooecium. 



Beania Johnston, 1840 



Key to the species discussed here 



1. Basal spines absent, avicularia typically present (absent in some specimens) 2 



Basal spines present, avicularia absent 9 



2. Connecting tubes all at proximal end, greater part of zooecium erect ... ... ... 3 



Connecting tubes distributed all round prostrate zooecium 5 



3. Six connecting tubes, not more than two distal spines 4 



Four connecting tubes, at least six distal spines 12. B. scotti 



4. Zooecia small, a few marginal spines present, avicularia hump-backed, beak forming more 



than half their length, ovicell with tube passing to distal zooecium 9. B. challenged 



Zooecia large, no marginal spines, avicularia flat-backed, beak forming less than half their 

 length, ovicell without tube 



5. Six connecting tubes 

 Four connecting tubes 



6. Marginal spines absent 



Marginal spines present 



7. Avicularia rare, single, passing between connecting tubes to basal surface 

 Avicularia constantly present, frequently paired, not passing to basal surface 



8. Two horn-like processes on operculum, avicularia with short beak ... 

 No horn-like processes on operculum, avicularia with relatively long, but variable, beak 



3. B. discodermiae 



9. Zooecia very long, recumbent, connected by six short, stout tubes, basal spines in single 



median line, branched 7. B. pulchella 



Zooecia not exceptionally long, erect, connected by four to six long, thin tubes, basal spines 



unbranched, scattered, chiefly towards periphery ... ... 6. B. fragilis 



1. Beania costata (Busk). 



Diachoris costata Busk, 1876, p. 116; 1879, p. 195, pi. x, figs. 4-6; Vallentin, 1924, p. 374. 



Beania costata Kluge, 1914, p. 647, text-fig. 27 (references). 



not Beania costata MacGillivray, 18866 (see B. discodermiae). 



Station distribution. Sub- Antarctic: South Atlantic Ocean, Sts. 48, 56; South Indian Ocean, 

 St. 1562. 



Geographical distribution. Magellanic Region (Jullien; Calvet); Patagonian Shelf (Busk; 

 Vallentin; U.S. National Museum; Discovery); Marion Island (Discovery); Kerguelen (Busk; 

 Kluge). 



