A MONOGRAPH OF THE EXISTING CRINOIDS 365 



PI is slender and delicate, 6 mm. long with 35 segments of which the seventh or 

 eighth and following are about as long as broad ; except for the absence of the expansion 

 of the first two segments it resembles P, in Calometra. P 2 in the type specimen is 6 

 mm. long with 18 segments of which the sixth-eleventh are greatly produced ventrally 

 forming a roof over the gonads, which are further protected by a heavy ventral plating; 

 the seven terminal segments are very small and delicate. P 3 is similar, 4.5 mm. long 

 with 14 segments of which the sixth-tenth are expanded to protect the gonads. P 4 

 is 4 mm. long with 13 segments of which the fifth-ninth are expanded. P 6 is 3 mm. long, 

 small and moderately stout, with 10 segments none of which are expanded. The 

 pinnules following gradually increase in length, the distal pinnules being 5 mm. long 

 with 11 or 12 segments. In other specimens the genital pinnules usually have the 

 fifth-eighth segments expanded, or in small specimens the fifth-sixth or fifth-seventh. 



Notes. One of the specimens from the Danish Expedition to the Kei Islands 

 station 1 has the arms 45 mm. long; the other two are smaller. 



The specimen from the Danish Expedition to the Kei Islands station 56 has the 

 arms 45 mm. long and the cirri 10 mm. long with 10-11 (usually 10) segments. 



Localities. Siboga station 266; Kei Islands (lat. 556'30" S., long. 13247'42" 

 E.); 595 meters; gray mud with coral and stones; December 19, 1899 [A. H. Clark, 

 1912, 1918] (39, U.S.N.M., E. 427; Amsterdam Mus.). 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; station 1; 370-400 

 meters; mud; March 30, 1922 (3, U.S.N.M., E. 3151; C. M.). 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; station 56; 245 meters; 

 mud; May 10, 1922 (1, C. M.). 



Siboga station 297 ; Lesser Sunda Islands, north of Rotti (lat. 1039' S., long. 123 40' 

 E.); 520 meters; soft gray mud with a brown upper layer; January 27, 1900 [A. H. 

 Clark, 1918] (1, Amsterdam Mus.). 



Geographical range. From the Kei Islands to the vicinity of southwestern Timor. 



Bathymetrical range. From 245 to 595 meters. 



History. Strotometra priamus was originally described in 1912 from a specimen 

 from Siboga station 266. It was redescribed and figured in 1918 when 39 specimens 

 from station 266 and one from station 297 were recorded. 



STROTOMETRA PARVTPINNA (P. H. Carpenter) 



[See vol. 1, pt. 2, fig. 231, p. 191.] 



Antedon parvipinna P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 127 (de- 

 scription; Challenger station 192), pi. 15, fig. 9. HARTLAUB, Bull. Mus. Comp. Zool., vol. 27, 

 No. 4, 1895, p. 130 (systematic and bathymetrical relationships). HAMANN, Bronn's Klassen 

 und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1578 (listed). A. H. CLARK, Crinoids 

 of the Indian Ocean, 1912, p. 33 (identity). 



Charitomelra parvipinna A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 361 (listed). 



Strotometra parvipinna A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 20 (listed); Crinoids 

 of the Indian Ocean, 1912, p. 33 (identity), p. 226 (synonymy; locality); Smithsonian Misc. 

 Coll., vol. 61, No. 15, 1913, p. 50 (published reference to specimen in the B. M.; Challenger station 

 192; characters, and comparison with S. hepburniana) ; Unstalked crinoids of the Stboya-Exped., 

 1918, p. ix (relationship with S. hepburniana), p. 192 (in key; range), p. 194 (references; notes; 

 Stas. 254, 297), pp. 274, 275 (listed). GISLEN, Ark. Zool., vol. 19, No. 32, Feb. 20, 192S, p. 9, 

 No. 44 (notes); Kungl. Fysiogr. Sallsk. Hand!., new ser., vol. 45, No. 11, 1934, p. 18. 



