POLYPS AND CORALS. 55 



SAGARTIA Gosse (restricted) . 



Sagartia (pars} Gosse, Trans. Linn. Soc., XXI, p. 267, 1855; Actin. 

 Brit., p. 25 and 122, 1860. 



Paractis (pars) Edw. and Haime, Coralliaires, I, p. 248, 1857. 



Sagartia Verrill, Keview of the Polyps of the West Coast of Amer- 

 ica, in Trans. Connecticut Academy, I, p. 482, March, 1869. 



This genus, as here intended, includes those species 

 considered as most typical by Gosse. 



These have fewer and more elongated tentacles than the 

 preceding genera, and the tentacles are also more con- 

 centrated towards the margin, leaving a broader naked 

 area around the mouth. The wall of the body is nearly 

 smooth, with inconspicuous suckers, which are, perhaps, 

 wholly wanting in some species. The acontia are present 

 in different quantities in the various species. 



Some of the following species here included may not 

 really belong to the genus, since the presence of acontia 

 has not been demonstrated, but they are in such cases 

 placed here on account of their resemblance to known 

 species in structure and habits. 



SAGARTIA RADIATA Verrill, these Proceedings, Vol. V, 

 p. 50, 1866. 



Actinia radiata Stimpson, Proc. Philadelphia Acad. Natural Sci- 

 ences, 1855, p. 375. 



Vol. F, plate 1, figures 5, 5a, 5b. 



Base expanded, oblong, always attached to small, elon- 

 gated spiral shells. Column in expansion forming a low 

 cone; the disk much smaller than the base; in contraction 

 much depressed, radiated with Avhite. Tentacles slender, 

 tapering, pointed, arranged in two close alternating rows 

 at the margin, about forty in number. 



Longest diameter of base .5 of an inch. 



Color of body light brown, with radiating stripes of 

 chalk-white, which gradually widen towards the base. 

 Mouth radiated. Disk spotted with flake-white around 



