40 McMURRICH 



but otherwise it is smooth and is unprovided with verrucae or 

 tubercles. In two of the specimens embryos were adherent to 

 the surface, and appeared as small, oval, pale bodies, in one 

 specimen arranged in a single incomplete and interrupted circle 

 a short distance above the limbus, a i^ew lying a short distance 

 above this circle in one part of the circumference, while a single 

 one was attached high up on the column wall not far from the 

 margin (Fig. 28, E7U.). In the second specimen but one embryo 

 occurred, situated a short distance below the margin. 



The margin is quite distinct, but smooth, except for wrinkles 

 produced by contraction, and it is separated by a slight fosse 

 from the bases of the outer tentacles. The tentacles are moder- 

 ately long and acuminate and are distinctly entacmaeous. I 

 did not succeed in making a satisfactory enumeration of them, 

 but they are fairly numerous and appear to be arranged in five 

 or six cycles. 



The disk in the only specimen in which it could be seen was 

 of slight extent and concave. The peristome is prominent and 

 the lips grooved. Two gonidial grooves were distinguishable. 



Color. — According to Dr. Calkins' description the color is a 

 " bright grass green or weed green" striped with darker green. 

 Verrill apparently had no notes of the coloration of the speci- 

 mens he studied, but among the drawings loaned me by Mr. 

 Agassiz I find two which apparently represent this species. 

 One is undoubtedly identical though it has no embryos ad- 

 herent. The column is represented as bright grass green 

 marked with longitudinal streaks of dark brown. The disk is 

 very dark green with numerous radiating stripes of cream white 

 and the tentacles are buff with a distinct dark greeriish-brown 

 spot at the base of each. This specimen was obtained at 

 Crescent City. The other specimen is less certainly identical 

 though having the same general external form. The column is 

 dark brown streaked longitudinally with lighter brown and the 

 tentacles are a dull grayish green. This specimen was obtained 

 at San Rosario. 



Size. — The living specimens measure from 1.2 to 2.5 cm. in 

 diameter and the largest about 1.2 cm. in height. The preserved 



