259 



teeth on the arms. Among these anchors there is a third much 

 smaller sort (Fig. 48. 4) (150 ^ X 115 //), and a fourth sort (Fig. 

 48. 2), not hollowed on the vertex and measuring 270 — 290 fi in 

 length and ca. 180 p in width. The anchors from the anterior end 

 of body (Fig. 48. 5) are very like the smallest anchors from the 

 posterior end. They measure ca. 150 (ju in length, but usually not 

 more than ca. 90 /* in width. 



The plates corresponding with the large anchors are very varying 

 in size and shape, as their anterior end may be more or less well 

 developed. They measure up to ca. 500 // in length by ca. 400 ^ 

 in width. The central holes are the largest, and usually they are 

 faintly toothed (Fig. 47. 7). The surface of the plate may be set 

 with faint teeth, and there are often some irregular, branched protub- 

 erances. The articulation with the anchors is well developed. The 

 plates corresponding with the small plates in the posterior end are 

 all of very nearly the same shape (Fig. 47. 6), but their size is 

 varying with the size of the anchors. The plates corresponding with 

 the common anchors measure ca. 180 // in length and 210 fi in 

 width, being thus a little wider than long. The anchor-plates from 

 the anterior end of body (Fig. 47. 5) are, as the small plates from 

 the posterior end, distinctly dented on the surface. They measure 

 ca. 150 [i in diameter and are more or less rounded. 



In the posterior end of body there are numerous cross-shaped 

 bodies (Fig. 48. 10) in the interambulacra (in the ambulacra some 

 few ones may be found); they are rather thick, with short arms and 

 with four large teeth, one on each arm. More anteriorly these bodies 

 are slender (Fig. 48. 9) and their arms are relatively longer. On 

 the anteriormost end of body, close to the tentacles, cross-shaped 

 bodies are wanting and represented by numerous, stellate, perforated 

 plates (Fig. 48. 8). The distribution and the number of these three 

 sorts of miliary granules may vary from specimen to specimen, the 

 stellate bodies being always wanting when only few granules are 

 present. Besides the bodies described above, there are oval bodies 

 in both ends of the specimens. In the posterior end of body there 

 are two sorts, one in the ambulacra (Fig. 48. 12) measuring 25 — 

 30^ and one in the interambulacra (Fig. 48. 11) measuring 10— 

 15 fi. In the anterior end of body the small ones from the inter- 

 ambulacra are wanting. 



