272 T. A. STEPHENSON 



separated. The sphincters show a graded series from weak 

 to fairly strong, aiul from diffuse* to more circumscribed, so 

 that it woukl b(; difficult to draw a boundary line (cf. Part IT, 

 Text-figs. 11, D, F, ;iud 12, d, e, for some of the weaker ones). 

 And there are no other special points of difference. B . c a p i - 

 tat a is said to have only six pairs of perfect mesenteries, in 

 which case it should be transferred to Macro dacty la, 

 and then the latter name might have to give way to the earlier 

 name A u 1 a c t i n i a , ii> a new sense. It is possible of course 

 for young specimens of a species to have only six pairs of per- 

 fect nu^senteries, but if it persists in the adult the foim needs 

 exclusion both from J3 u n o d a c t i s and from the Actiniidae too. 



Tealia, Closse, 1S58, p. 417 ; 18GU, j). 205. 



Khod actinia, Agassiz, 1H47, ]). (J7*t : iSOo, p. 18. 



ActiniidiU'. Body soini'tiines low and broad, attaining however a liigli 

 cylindrical form in full expansion. Body in some specimens very mobile 

 and changeable in form, in others less so. Column with verrucas which 

 are not usually arranged in definite vertical rows, at any rate in the 

 adult ; they are sometimes strongly, sometimes very weakly developed, 

 in still others quite absent — and all this within one and the same species, 

 probably. There is a parapet and fosse, but no acrorhagi in the ordinary 

 forms — they occur in certain Antarctic cases though. Tentacles simple, 

 stout, their longitudinal muscle varying from ectodermal to meso- 

 gloeal, the latter being perhaps the more typical condition in the common 

 forms, h'trong circumscribed sphincter. Tentacles and mesenteries 

 often in multiples of ten in the common forms, but not invariably. 

 Primary mesenteries may be fertile or sterile. Retractors strong or very^ 

 strong, diffuse or circumscribed diffuse. All inesenteries may be perfect. 

 (For T. crassicornis, see Part II, Text-figs. 7, b, and 12, b.) 



Species : 



T. crassicornis, O. F. Miiller, 1776, p. 231. (T. coriacea, 

 Cuvier, 1797, p. 653.) (See also Gosse, 1860, p. 209; Carlgren, 

 1893, p. 58 ; Carlgren, 1902, p. 38 ; Clubb, 1908, p. 9 ; McMur- 

 rich, 1911.) (Bolocera eques, Gosse, 1860, p. 351 ; Madon- 

 iactis lofotensis, Dan., 1887. p. 47, pro parte.) 



T. carlgreni, Clubb, 1902, p. 297. 



T. sulcata, Clubb, 1902, p. 295. 



Tealia seems to be the famous genus for synonymy- 

 discussions, and I will add as little as possible. I cannot 



