140 



ACTINIARIA 



^ 



I have before given utterance to my doubt of its place among the Boloceridae. True enough, the tentacles 

 are constricted at the base and the mesogloea of the tentacles thicker than that of the oral disc, whereby 

 a narrowing is formed at the base of the tentacles, but there is no tentacular sphincter. On account of this 

 it is very improbable that the tentacles are able to loosen themselves. For the present I hold it suitable to 

 place the genus among the Actiniidae. Pax (1914, p. 610) and Poche (1914) share my opinion, while 

 Stephenson (1918, a, b) comes to the same conclusion as Mc. Murrich. 



Stephenson (1918a, p. 20) supposes, that also Polyopis is a Bolocerid. In consequence of the reasons 

 I have before given (p. 81, 82) I must place this genus to the Athenaria. 



At last Stephenson (1918 b, p. 112) proposes a new genus, Leipsiceras, for such Bolocera forms 

 which have "an extremely long and pecuHar circumscribed sphincter." In this I fully agree with him. I have 

 found a new species of this genus from Gote Islands having a still stronger sphincter than that of the type, 

 L. pollens. To tliis family thus only Bolocera and Leipsiceras to my mind belong. 



From the species, enumerated by Stephensop (1918 b, p. 112), the following must be removed. 



i) Bolocera brevicornis Mc. Murr. which, according to Mc. Murrich (1904, p. 255), is a Boloce- 

 roides. 



2) Bolocera africana Pax which is a Sagartiid (Carlgren, 1911, p. 21). 



3) Bolocera norwegica Pax. Nothing in the imperfect description indicates that the species is a 

 Bolocera (Carlgren 1911, p. 21). 



Genus Bolocera. 



Diagnosis: Column smooth, sometimes (always?) with scattered irregular gland-spots, not or only 

 a little capable of involution, with a distinct fossa. Sphincter endodermal diffuse. Tentacles in contracted 

 state longitudinally sulcated, generally very numerous, short or of considerable length, hexamerously ar- 

 ranged. Ivongitudinal muscles of the tentacles and radial muscles of the oral disc ectodermal. Two well- 

 developed siphonoglyphes with distinct gonidial tubercles and aboral prolongations. Muscle pennons of the 

 mesenteries rather well-developed, parieto-basilar muscles rather weak, basilar muscles distinct. More than 

 6 pairs of perfect mesenteries. Distribution of the reproductive organs on the mesenteries variable. 



Bolocera tuediae (Johnst.) Gosse. 

 Actinia tuediae n. sp., Johnston 1832, p. 163, fig. 52. 



Anthea — (Johnst.), Johnston 1847, p. 242, fig. 53. Sars 1846, p. 29. Diiben & Koren 1847, P- 267. 



Danielssen & Koren 1856, p. 87. 

 ), Milne-Edwards 1857 — 60, p. 235. 



), Gosse i860, p. 186, PI. 5, fig. I. Verrill 1873, p. 5, 1883, p. 59. Schulze 1875, 

 p. 140. Andres 1883, p. 421. Levinsen 1893, p. 396. Appellof 1894 — 95, p. 11, 

 1905, p. 67, 71. Grieg 1897, p. 6, 7, 9, ir, 13, 1913, p. 144. Parker 1900, p. 753. 

 Carlgren in Nordgaard 1905, p. 159. Walton 1908, p. 215. Pax 1909, p. 342, 

 343. Stephenson, 1918 b, PI. 14, fig. 2, PI. 20, figs, i, 3 — 6. 



Anetnonia — ( 

 Bolocera — ( 



