276 T. A. STEPHENSON 



B, kerguelensis, Studer, 1879, p. 544. (See Kwietniewski, 



1896.) 

 B. multicornis, Verr., 1879, p. 198. (See Carlgren, 1902 



(Olga), p. 36.) 

 B. brevicornis, McM., 1893, p. 158. 

 B. pan n OS a, McM., 1893, p. 156. 

 B. occidua, McM., 189.3, p. 154. 

 B. multipora, Hertw., 1882, p. 129. (See also references given 



above for L i p o n c m a . ) 



The genus B o 1 o c o r a should be limited to the above defini ■ 

 tion and list of species, as regards known forms. B. pollens 

 has now a genus apart on account of its sphincter. B. eques 

 is a Tealia. !>. norvegica is of doubtful standing. 

 B . a f ri c a na is, according to Carlgren (1911, ]>. 21), a S.agartid 

 %vrongly described as a Bolocera. 



Leipsiceras, Steph., 1918 b, p. 112. 



Actiniidae with smooth wall, no verrucae or acrorhagi. Very strong 

 circumscribed sphincter. Tentacles provided with sphincters, therefore 

 deciduous. 



Species : 



L. pollens, McM., 1898, p. 230. 



This genus was separated from Bolocera on account of 

 the sphincter. It seemed advisable because of the wide gap 

 between the tjrpically diffuse Boloc era-sphincter and the 

 elongate circimiscribed muscle with a mesogloeal axis found in 

 L. pollens ; there is a gap here, not a series as in Buno- 

 d a c t i s . 



BoLOCEROPSis, McM., 1904, p. 255. 



Actiniidae with smooth body and tentaciilatc margin. The only 

 known species has large tentacles rather like those of a Bolocera. 

 but without tentacle-sphincters ; their longitudinal muscle ectodermal. 

 Sphincter and retractors diffuse. 



Species : 



B. platei, McM., 1904, p. 255. 



Whether there is really any sound distinction between this 

 genus and G y r o s t o m a it is not easy to decide, but pending 

 further knowledge it is safest to let it stand. The nature of the 

 margin may be quite a good distinguishing point. 



