REPORT ON THE HEXACTINI^ 31 



pearanjj of the bread crumbs is given by the numerous small 

 pieces of shell attached to the upper end." ^ The tentacles in 

 some of the specimens at least were banded with color. Al- 

 though none of the specimens showed any traces of green in 

 their coloration, yet such varieties have been described from the 

 West Coast. Verrill ('69) has described them, and one of the 

 drawings of Mr. Agassiz is evidently of an individual of this 

 species in which the color of the column is grass green ir- 

 regularly blotched with deep red, the tentacles being pinkish, 

 with a dark red band a short distance above the base. The 

 drawing shows no indication of warts in the lower portion of the 

 column ; whether or not they were present on the upper part 

 cannot be determined since it is hidden by the tentacles. 



vS/sr. — All the specimens were of a goodly size, the smallest 

 measuring about 4.5 cm. in height and diameter while the 

 largest was 7.5 cm. in height and 5.5 cm. in diameter. Dr. 

 Calkins describes one of the specimens as having in life a 

 height of 7.5 cm. and a diameter of 5.0 cm. while another he 

 describes as reaching a height of 12.5 cm. 



Internal Structure. — I have found some variation in the form 

 of the sphincter in the Puget Sound specimens. Its general 

 appearance in the majority of the individuals examined resembles 

 closely the condition figured by the Hertwigs ('79), that is to 

 say, the mesogloeal lamellae radiate out for a central mass of 

 mesogloea, sometimes more or less homogeneous in appearance, 

 sometimes showing more or less clearly its origin by fusion of the 

 basal portions of the lamellae. In all my preparations, however, 

 the lamellae are much more numerous and much more delicate 

 than figured by the Hertwigs, a condition also noted by Carl- 

 gren ('93) in the specimens examined by him. It may be noticed 

 that at one point in the periphery of the specimen figured by the 



^ Since writing the above lines I have received from Professor Verrill drawings 

 of a specimen takn at Port Townsend in 30 fathoms which is evidently the same as 

 the arenicolous variety of Urticitta cra^sicornis described above. The drawing 

 represents the column as being of a bright scarlet color, with very numerous and 

 distinctly marked verrucas of a yellowish color in its upper part and with long, rather 

 stout tentacles of a yellowish or buff color without bands but with a certain amount 

 of red at the base. 



