(jG art. 7- — T. 1JT.>[A : IIEXACTINELLTDA, IV. 



straiglit or sliglitl\^ l)ent, obRoletely rongli or nearly smooth, 

 divergent terminals. There are in some oxyhexasters perceptibly 

 more slender than in others. 



The small (lisrohexaster (PI. VT., fig. 4) may be said to be 

 spherical in shape ; the terminals emanating from each principal do 

 not form a distinctly separate tnft, as seems to have been the case 

 in the specimens stndied l)y F. E. Schulze, Diameter, 4'")-50 r,.. 

 As shown in the figure referred to, the minute terminal discs 

 ol'ten appear as if they were situated in the periphery at un- 

 c(|ual distances from the central })oint. T tliiidv this is due, not 

 so much to actual differences in the length of the terminal rays 

 as to the various directions in which these are viewed. The 

 said discohexasters are scattered in moderate abundance in the 

 subgastral region as well as along the surface of the excurrent 

 canals. They are somewhat more common in the latter region 

 than in the former. F. F. Schulze ('97) found the rosette in 

 (|uestion generally shifted out to the free I'ay-tij) of oxyhexacti- 

 nie canalaria. Similar instances were observed also by me, in 

 Avhicli a rosette hung on the free end of a stray parenehymalia- 

 ray that projected into the canalar lumen. 



CRATEROMOEPHA MEYERI TUBEROSA Tj 



PL IV., Hg. 1>; PI. v., figs. 12 ct 13. 



CJ. meyeri vai'. luhero.^a. Ijima, '98, ]i. 49. 



Of the specimens wdiich I refer to a subspecies of (J. meyeri 

 under the above trinomial designation, several (no less than 



