ACTINOPODOUS HOLOTHUPJOIDEA. 



159 



ly faded, and both the preserved specimens in hand are hght 

 l)ro\vn. 



The body is angular and quadrilateral in section. Along each 

 of the two dorsal and two lateral ambulacra an alternate row of 

 large papillae (ca. 2 cm. high) is found. The whole length of the 

 Osliima specimen wlieu living was 30 cm., but has shrank to 15 

 X 7 cm. in alcohol. 



Calcareous bodies are tables and C- shaped bodies. Tables 

 are all of slender build (textfig. 27 J), c). The disk is rather small 

 being about 0.028 mm, across, and having, in addition to four 

 large holes, only four other openings, or at the most one 

 more or less incomplete additional circle of openings. The spire is 



about 0.032 

 mm. in height, 

 built of four 

 slender ])il- 

 lars and hav- 

 ing only one 

 cross-beam. 

 The crown ap- 

 pears to be 

 somewhat 

 flared out, and 

 teeth 

 number eight 

 (in whiclicaso 



two stick out laterally from each angle) or twelve (in which case 

 an additional tooth is directed upward from each angle), all point- 

 ing away from one another. The C-shaped bodies {d) are in a 

 layer below the tables, and are scattered irregularly. Their size 



Textfig. 27. 



Stkliopus clduromitas : a — CiJeareous ring; b, c — Tables of dorsum; 

 d — C-shaped body ; e — Sai)purting rod. {h — e x 240). Imd — lliddorsal tllC 

 intermdialia ; Ird — -Right dorsal iulorradiiUia ; Irv — Eight ventral interradialia; 

 Rmv — Midventnl nwlialia ; llrd — liiglit dorsal rndialia ; Rrl — Eight lateral 

 indinlin. 



