ACTINIANS OF GULF OF CALIFORNIA— CARLGREN 425 



the sphincter of a specimen from Puerto Refugio. It recalls the 

 sphincter of Anthostella {Phyllactis) coyichilega figured by Mc- 

 Murrich (1905) but on other slides not far from that figure the 

 middle part, up to about a third of the sphincter, is attached to 

 the column. The sphincter of the specimen from Point Lobos is 

 more restricted (fig. 79, /) ; two others from Puerto Escondido 

 and La Paz are more elongate (fig. 79, g) . The tentacles number 

 40 or 48, conical, rather short, sometimes longitudinally sulcated 

 in contracted state, their longitudinal muscles ectodermal, forming 

 high folds that are closely set and sometimes a little branched. 

 There usually are two rather broad siphonoglyphs that are sym- 

 metrically set and aborally more or less prolonged. The specimen 

 from Puerto Refugio has, however, a single siphonoglyph. The 

 pairs of mesenteries are 20 or 24, all perfect and fertile, including 

 the directives; the specimen provided with a single siphonoglyph 

 has 20 pairs. There are the same number of mesenteries proximally 

 and distally. The retractors are diffuse, strong, especially below 

 the actinopharynx. The parietobasilar muscles are well developed, 

 forming a distinct shelf on the mesenteries. There are numerous 

 zooxanthellae in the endoderm. The nematocysts of the column 

 are 12.7-18.3 by 2.2-2.5 /x (basitrichs) ; those of the fronds 10-14 

 by 2.2-2.5 /a (basitrichs) ; those of the tentacles 21-33.8 by 2.5- 

 2.8 ^ (basitrichs, numerous) ; those of the actinopharynx partly 

 19.7-32.4 by 2.8-3 (3.5) ^x (basitrichs), partly 21-31.8 by 4-6.3 /x 

 (microbasic ?j-mastigophors) ; those of the filaments partly 31-49.3 

 by 3-4.2 IX, partly about 10 by 2.5 jx (few, both basitrichs), partly 

 21-31.8 by 4.2-5.6 jx (microbasic ^j-mastigophors) . Three speci- 

 mens were examined, all agreeing in the size of the nematocysts. 



Color in alcohol. — One specimen brown; another almost un- 

 colored or pale brown. 



Measurements. — The largest specimen, length of the column 

 about 2.5 cm., breadth of the body up to 3.6 cm. 



Collecting records. — Espiritu Santo Island, Point Lobos, March 

 20, 1940, 1 specimen; east of La Paz, March 21-22, 1940, 1 

 specimen ; Puerto Escondido, March 26, 1940, 4 specimens ; Puerto 

 Refugio, Angel de la Guarda Island, April 2, 1940, 1 specimen. 



PHYLLACTIS BRADLEYI (Verrill) 



Figure 79, h; Plate 14, Figure 2 



Asteractis bradleyi Verrill, 1869, p. 463; 1899a, p. 46, figs. 10-12. — Andres, 

 1883, p. 506. 



The body of the larger specimen is very elongate (pi. 14, fig. 2) ; 

 the smaller specimen is also longer than broad. The verrucae 

 occupy only a small space below the ruff. In the large specimen 



