ACTINOPOUOUS H0L0TH\JPJ0IDEA. 



225 



The calcareous deposits in the sole (text- 

 fig. 41) are very numerous and crowded, so 

 that in cutting out a piece ^Yitll scissors, a 

 peculiar grating sound is heard. They con- 

 sist of plates of various irregular shapes, 

 bearing from a few to many knobs on the 

 surface. The ends of the knobs often join 

 to form the characteristic fenestrated plates, 

 parallel to the original plate. The edges of 

 these plates are more or less scalloped. 



From the only specimen on hand the 

 number of tentacles, etc., could not be 

 ascertained. 



Textfig. 41. 



Psolus ascidiiformbt. 

 Knobbed plate fi-om sole. 

 X 200. 



53, Psolus squainatus (Müller). 



(PL VU., figs. 61—62 ; textfig. 42). 



Hdothuria sqitamota Mlli.ePv 1788, Taf. X., Fig. 1—3. 



Cuvkria squomata? J.ï:ger 1833, p. 20. — ? Blmxville 1834, p. 192. — 

 DÜBEN odi KoEEX 1844, pp. 222—6, Taf. IV., Fig. 35— 41.— Koren 1845, 

 Fig. 1— 16.— Lütken 1857, p. 69.— Selenka 1867, p. 343. 



Psolus squamafus ANDREW and Barret 1857, p. 45. — Sars 1858, p. 169. 

 — Sars 1861, pp. 112— 3.— Seiiper 1868, pp. 62, 272.— Beix 18S2, p. 645.— 

 Lampert 1885, p. 119. — Kükenthal und Weissenboen 1886, p. 780.— Lud- 

 wig 1889— '92, p. 350.— Pfeffer 1890, pp. 88, 95.— Nordgaard 1893, pp. 

 5, 10.— Norman 1893, p. 349.— Meissner und Collin 1894, p. 345.— Grœg 

 1894, p. 4.— Sluiter 1895, p. 81.— Appellof 1896, p. 12.— Grieg 1897, pp. 

 4, 7, 11, 12, 24.— Ludwig 1898«, pp. 58, 61.— Bidekn.vp 1899, p. 106.— 

 Ludwig 1900, p. 158.— Cl.\rk 1901^/, p. 171.— Clark 190h?, p. 491.— 

 Östeegren 1902, p. 10. — Perrier 1902, pp. 513—4. 



Lopliotlmria squamata Vereill 1873. 



