PART 5 



A MONOGRAPH OF THE EXISTING CRINOIDS 



693 



FIGURE 42. Bathymttra carpenteri A. H. Clark, holotype: a, Centro- 

 dorsal; b, calyx viewed from the other side. 



mm 



[fig. 2 = 5. carpenteri}. BATHER, Quart. Journ. Geol. Soc., vol. 45, 1889, p. 154 (interradia 

 projection of radials homologous with petals, spearheads or spines in the Eugeniacrinidae; ex- 

 actly paralleled in many Larviforma). P. H. CARPENTER, Journ. Linn. Soc. (Zool.), vol. 24, 

 1891, p. 59 (considered an embryonic type). HARTLAUB, Nova Acta Acad. German., vol. 58, 

 1891, No. 1, p. 14. WALTHER, Einleitung in die Geologie als historische Wiss., 1894, p. 298 

 (after Carpenter). THOMPSON, Proc. Roy. Soc. Edinburgh, vol. 22, 1899, p. 321 (evidence in 

 support of the bipolar theory). A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 

 353 (listed). HAHANN, Bronn's Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 1907, 

 p. 1579 (listed). A. H. CLARK, Proc. U.S. Nat. Mus., vol. 34, 1908, p. 454 (determination of 

 the type locality); Crinoids of the Indian Ocean, 1912, p. 33 (of Carpenter, 1888 = B. abyssicola 

 + B. carpenteri); Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 79 (same). KOEHLER, Les 

 echinodermes des mers d'Europe, vol. 1, 1924, p. 58 (depth). 



Bathymetra abyssicola A. H. CLARK, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 132 (listed); Proc. 

 U.S. Nat. Mus., vol. 34, 1908, p. 235 (restricted by the description of one of the two specimens 

 as B. carpenteri); Crinoids of the Indian Ocean, 1912, p. 33 (=Antedon abyssicola P. H. Carpen- 

 ter, 1888, in part), p. 244 (synonymy; north Pacific, 2900 fins.); Smithsonian Misc. Coll., vol. 

 61, No. 15, 1913, p. 66 (published references to the specimen in the B.M.; Challenger sta. 244); 

 Journ. Washington Acad. Sci., vol. 5, 1915, No. 6, p. 215 (Antarctic type; range and its signifi- 

 cance); Die Crinoiden der Antarktis, 1915, p. 148 (synonymy; range); Unstalked crinoids of the 

 Siboga-Exped., 1918, p. 254 (in key; range; references). GISLN, Ark. Zool., vol. 19, No. 32, 

 1928, p. 11 (note). TORTONESE, Natura, Milano, vol. 24, 1933, p. 164. GISLEN, Rep. Swedish 

 Deep Sea Exped., vol. 2, Zool., No. 4, 1951, p. 56 (depth). 



Diagnostic features. The centrodorsal has no cirri around the base but around 

 the dorsal pole there are 10 to 15 which are directed vertically in the two known spec- 

 imens ; the radials form a continuous curve with the base of the centrodorsal and are 

 not very foreshortened in side view; the articulations of the brachials are not unusually 

 free dorsally; the pinnides are unknown. 



Description [by A.M.C.]. The centrodorsal is probably low hemispherical, but 

 the shape is concealed by the bases of the cirri which are concentrated around the 

 dorsal pole leaving bare the peripheral half. 



The X-XV cirri are now all broken by the sixth segment and no detached distal 

 parts remain. Carpenter gave the number of segments as 8 to 10. According to his 



