ACTINIANS OF GULF OF CALIFORNIA— CARLGREN 



443 



ZOANTHUS DANAE (LeConte) ? 



Figure 84, e-h 



Zoantha danae LeContb, 1851, p. 320. 



Zoanthus danae Verrill, 1866, p. 329. — Andres, 1883, p. 539. 



Mamillifera danae Verrill, 1869, p. 496. 



The polyps are rather thinly set and connected with a rather thin 

 coenenchyme. The ectoderm of the scapulus is discontinuous but the 

 mesogloea balks are very narrow. In the ectoderm of the column, 

 numerous pigmented cells of varying appearance are collected. 

 These are also present in the ectoderm of the tentacles and actino- 

 pharynx, in the mesogloea of the column, and in the endoderm. In 

 figure 84, e, I have drawn some cells of the scapus. The canal 

 system of the scapus at the level of the actinopharynx or just be- 

 low it shows a rather closely set network, which in an individual 

 from Puerto Escondido is somewhat thinner (fig. 84, /) than that 

 of a specimen from Concepcion Bay (fig. S4, g) . The sphincters are 

 strong, especially the lower sphincter, which is broad in its upper 

 part but diminishes rather quickly downward. The muscle meshes 



Figure 84. — a-c, Palythoa insignis, new species: a, Section of column; b, sphincter; 

 c, lower part of macromesentery, inner side to right, d, Palythoa pazi, new species, 

 lower part of macromesentery, inner side to left, e-h, Zoanthus danae (LeConte) ?: 

 e, Cells of scapus; /, canal system of scapus of specimen from Puerto Escondido; 

 g, canal system of scapus of specimen from Concepcion Bay; h, sphincter. J, 

 Zoanthus depressus, new species, sphincter. 



