274 T. A. STEPHENSON 



communicate with mesenterial spaces. But although this is true 

 in a sense, it smothers the more important fact that in Tealia 

 the total arrangement of warts on Ihe body- wall as a whole 

 presents an irregular appearance to the eye, whereas in the 

 contrasting l^unodactis the warts run in regular vertical 

 series visihle ;is such, and often with a cyclic arrangement 

 corresi)onding to the cycles of endocoels, and even coloured 

 differently according to cycle in some cases, so that in the 

 end the difference is a marked one. 



Epiactis, Verr., 1868. 



Epigonactis, Verr., 1899, p. 878. 



Glyphoperidium, Eoule, 1909, p. 10. 



Not Leio tealia, Hertw., 1882, p. 37 — which is probably 



a synonym of Aureliania ; see note under that genus 



on p. 292. 



Actiiiiidae in which tlie base may be well developed, or somewhat 

 reduced, or may be crack-like through attachment to a spine. Wall 

 smooth, no verrucae or acrorhagi, but well-marked parapet and fosse. 

 There may be young ones adherent to the surface, or even shallow or 

 deep brood-pouches. Tentacular longitudinal muscle ectodermal or with 

 a tendency to anastomosis ; disc radial muscle ectodermal or meso- 

 gloeal. Sphincter well developed, circumscribed, varying in strength 

 but usually very strong, sometimes exhibiting a good deal of anasto- 

 mosis of processes. Retractors diffuse, circumscribed diffuse, or even 

 circumscribed, often very strong. Mesenteries may be all perfect ; 

 gonads from cycle one onwards, or not ; or on all, save perhaps the 

 directives. (For two Epiactis sphincters see Part II, Text-fig. 12, 

 A and c.) 

 Species : 



E. prolifera, Verr., 1868, p. 492. (E. fertilis, Andres, 

 1883, p. 574.) See also Torrey, 1902, and McMurrich, 1901. 



E. fecunda, Verr.. 1899, p. 378. (E. regularis, Verr., 1899, 

 p. 380.) (?E. spitzbergensis, Kwiet., 1898, p. 134, pro 

 parte.) 



E. marsupialis, Carlgr., 1901, p. 482. 



E. badia, McM., 1893, p. 194. 



E. thompsoni, Coughtrey, 1874. (See Stiickey, 1909, p. 370.) 



E. novo-zealandica, Steph., 1918 a, p. 24. 



E. ritteri, Torrey, 1902, p. 393. 



E. bursa. Roule, 1909, p. 11. 



