PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 723 



with muddy clay and stones. Here is found an extraordinarily rich and varied fauna, 

 including Hathrometra sarsi. 



According to Grieg (1912) this species is rather common at Lyktvor in 120 to 600 

 meters. It is also found at Eiterelv, Limesand, Svartdal, Djupevik, Smedenes and 

 Hanevik, in 80 to 200 meters. At Hus0 at the entrance to Sognef jord it was extraor- 

 dinarily abundant in certain localities, as near Kraak0skallen in 190 to 360 meters. 



In the southern part of Stromfjord (Grieg, 1895) this species in 1889 and 1891 

 occurred only very sparingly between 150 and 200 fathoms; but in 1895 it was present 

 everywhere in the waters around Hus0en in great numbers. In several localities the 

 sea bottom appeared to be densely covered with it, and twice the dredge came up 

 filled exclusively with this crinoid. The reverse was the case with Myriotrochus rinki 

 which is found in the same localities at Husoten as Hathrometra sarsi; in 1889 it was 

 very numerous, but in 1895 only a few individuals were found. 



Nordgaard (1893) says that this species is common at Skarnsundet on pebbly 

 bottom, where it is predominantly found attached to sponges. 



Occurrence of the pentacrinoids.- -The pentacrinoids of this species are known from 

 the following localities: Ingolf station 9, west of Iceland, 540 meters; Ingolf station 81, 

 southwest of Iceland, 887 meters; Thor station 57, off southeastern Iceland, 500 to 

 560 meters; southeast of Iceland (lat. 6416' N., long. 1114' W.), 347 meters; off 

 southeastern Iceland (lat. 6416' N., long. 1104' W.), 350 meters; Brettesnaes, Lofoten 

 Islands, 183 to 367 meters; Skraaven, Lofoten Islands, 548 meters; Guldbrand Islands, 

 183 and 184 to 220 meters; Manger, 92 meters; Hus0en, Sognef jord, 183 meters, tem- 

 perature 5.6 C. (given by mistake in part 2, p. 573, with the data of Vfiringen station 

 8); Thor station 3, southwest of Stavanger, 280 meters. For a description of the 

 pentacrinoids see part 2, p. 564. 



Genus FARIOMETRA A. H. Clark 



Antedon (part) HARTLAUB, Bull. Mus. Comp. Zool., vol. 27, No. 4, 1895, p. 144, and following authors. 

 Thaumatometra (part) A. H. CLARK, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 128. 

 Trichometra (part) A. H. CLARK, Smithsonian Misc. Coll., vol. 52, pt. 2, 1908, p. 232. 

 Nepiornetra (part) A. H. CLARK, Journ. Washington Acad. Sci., vol. 7, No. 5, 1917, p. 130. 

 Fariometra A. H. CLARK, Journ. Washington Acad. Sci., vol. 7, No. 5, 1917, p. 128 (referred to the 



Bathymetrinae), p. 130 (type species Trichometra explicata A. H. Clark, 1908; diagnosis; range; 



included species); No. 16, p. 510 (in key; range); Unstalked crinoids of the Siboga-E\ped., 1918, 



p. 245 (in key; range), p. 248 (key to the included species). GISLN, Ark. Zool., vol. 19, No. 



32, 1928, p. 11; Rep. Swedish Deep Sea Exped., vol. 2, Zool., No. 4, 1951, p. 55 (depth). 



Diagnosis. A genus of Bathymetrinae in which the centrodorsal is conical; there 

 are XXX or more cirri, of which the longest have 21 to 36 segments; the longer cirrus 

 segments are at least two and a half times as long as broad and even the shorter distal 

 ones are usually longer than broad; the brachials have spinous distal ends; PI has 

 up to 23 segments, of which not more than three or four of the basal ones are as broad 

 as long; the genital pinnules of the female do not bear marsupia. 



Type species.- Trichometra explicata A. H. Clark, 1908. 



Geographical range. From the Arabian Sea to the .East Indian region, and off 

 the west coast of America from Panama to southern California. 



Bathymetrical range. From 204 to 2194 meters. 



Thermal range. From 2.44 to 7.88 C. 



Remarks. As originally outlined in 1917 the genus Fariometra included only the 



556-62267 47 



