266 «T- Playfair McMukrich, 



theoretical total of 96 tentacles, althougli the specimens I counted 

 showed either a greater or less iiumber tlian tliat. one specimen 

 possessiiig 158 tentacles wliile in another I could count only 66. 



The largest specimens liave a heigiit of 0,9 cm and a diameter 

 at the margin of 1.2 — 2.0 cm, the diameter at the base being- about 

 the same. One of the dome-shaped individuals measured about 

 0.8 cm in height, while an unusnally elongated one measured 1.2 cm, 

 Avith a diameter of about the same. The innermost tentacles in the 

 expanded individuals measured 0.4 — 0.5 cm in length, although in 

 one specimen from Oalbuco thev reached as much as 0.9 cm. 



In the preserved condition the specimens from Tumbes are 

 entirel}' colorless, but the label which accompanied specimens 

 No. 153 gave their coloration in life as follows. "Farbe im Leben 

 ein zartes Meergrün mit dunklern durchsichtigen Längsstreifen, 

 Tentakel rosag'elb. Oder Körper weissgelblich mit rosagelben Längs- 

 streifen. Die Fühler können auch weissgelb sein." The specimens 

 from Calbuco on the other band had a more or less uniform chesnut 

 brown color which I am inclined to attribute to the use of osmic 

 acid in their preservation. A label which I take to refer to these 

 specimens (the vessel in which they were contained also a Zoanthid) 

 gives the life coloration thus: "Mundscheibe gelb, Fühler, Lippen, 

 Seiten des Körpers weiss, die letztern mit zahlreichen durchscheinenden 

 Längslinien."' The specimens No. 158 showed upon the column wall 

 twelve or twenty-four faint pink longitudinal lines and the disc 

 was also pink, though the peristome, tentacles and column were 

 colorless. 



Structure. The mesogloea of the column wall is thin, being 

 about the same thickness as the ectoderm and has a homogenous or 

 flnely fibrous structure. Near the margin it thickens somewhat to 

 euclose the sphincter (Fig. 51) which is fairly strong and elongate 

 triangulär, or in the more expanded individuals elongate-clavate in 

 section. In its upper part it is separated from the ectoderm by a 

 very narrow band of mesogloea and by an even thinner band from 

 the endoderm, but below it separates further from the ectoderm. 

 Its cavities are elongated in the upper part but below and on its 

 outer surface they are more i'ounded and scattered. The circular 

 musculature of the column wall is feeble. 



The margin is hardly marked and no fosse exists between it 

 and the bases of the tentacles. There were no acrorhagi. The 

 longitudinal muscles of the tentacles and the radial musculature of 



