ACTINOPOPOrs HOLOTHURIOIDEA. 207 



flukes. Besides these, the skin is closely packed everywhere with 

 large irregular tables (A, c). These have large disks which have 

 many holes. The disks measured presented the following dimen- 

 sions : 0.30 ram. x 0.19 mm.; 0.40 mm. x 0.18 mm.; 0.15 mm. x 

 0.10 mm.; 0.42 mm. x 0.20 mm.; 0,40 mm. x 0.25 mm.; 0.47 x O.IG 

 mm. j\Iany of them show prolongations in two, very often in 

 three diameters. Anteriorly and posteriorly, they become more 

 or less elongated. Many disks show a change into wine-red 

 substance, as stated for A. roretzii. On the disk there arises a 

 spire which is quite high, 0.18—0.20 mm., and consists of tlu-ee 

 or four, oftener four, columns. (3ne observes from seven to nine 

 cross-bars, but these have a very peculiar arrangement : i.e., those 

 on the four sides of the spire are at different levels, so that in trans- 

 parent views, the openings to the outside of the spire appear to be 

 alternately disposed on different sides. Wine-red corpuscles are 

 present but not in such a profuse quantity as in some other 

 species of Anhjroderma. 



liemarks : — This is a somewhat large form and appears to be 

 near A. maroccamim Perkier, but the calcareous spicules are quite 

 different. I can not identify it with any hitherto described spe- 

 cies, and am obliged to make a now species of it. 



69. Ankyrodertua roretzii \. MAi!ENZFJj,r.i!. 



(PI. Vni., fig. 78 ; toxtfig. u5). 



AnJciji-oihrnia rordzii v. MARENZELij:n 1881, pp. 121 •(•, Tiif. IV., Fig. 

 4.— LAMPEnx 188.''), p. 21:3, Fig. G9.— LrowiCx 1889— '92, p. 35.5.— Ludwig 

 1891, p. 584. 



Aiiki/rakrma {IltqJodadylu) rorthil Theel 1885 a, p. 49. 



