738 BULLETIN 82, tHSflTED STATES NATIONAL MUSEUM VOLUME 1 



and slowly increasing in length, at the same time becoming somewhat constricted 

 centrally. The brachials have the distal edge armed with excessively fine spines. 

 Distally syzygies occur at intervals of two or three muscular articulations. 



P, is 7 mm. long, with 21 segments, of which the first three are about as long as 

 broad and those following rapidly become elongated, being about four times as long 

 as broad in the outer half of the pinnule, or even longer distally. The first segment 

 bears a transverse band of spinules just before the middle. The second to fifth seg- 

 ments are studded with spinules and bear a coarsely spinous crest which is highest on 

 the third segment. As the segments elongate, their surface becomes gradually more 

 finely spinous, and they develop abruptly and widely flaring and overlapping distal 

 ends. The pinnule is slender and tapers evenly from the base to a very delicate and 

 hairlike tip. 



P2 is about 7 mm. long, with 20 segments, resembling Pi but somewhat stouter 

 basally. It bears a long fusiform gonad on the fourth to eighth segments. 



P3 is about 5 mm. long, with a few more than 11 segments, very slightly stouter 

 than P2 but otherwise resembling it. It bears a long fusiform gonad. 



Localiiy. — South of Lombok, Lesser Sunda Islands Gat. 8°59'54" S., long. 11.5°- 

 50'48" E.); 1097 meters; C.S. Cable [A. H. Clark, 1932] (1, B.M.). 



Remarks [by A.M.C.].— I have removed this species from Nepiometra to Fariometra 

 in the absence of any indication from Mr. Clark since he believed it to be closely 

 related to Fariometra io, which he himself transferred. It seems to me to be closely 

 allied to F. alcyon from the neighboring Banda Sea, the longer cirri of alcyon with 

 more numerous segments serving to distinguish them. 



FARIOMETRA PARVULA (HarUaub) 



Antedon parvula Hartlaub, Bull. Mus. Comp. Zool., vol. 27, No. 4, 1895, p. 144 (description; Albatross 



sta. 3363), pi. 3, fig. 21. — A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 353 



Oisted). — Hamann, Bronn's Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 1907, pp. 



1579, 1580. 

 Antedon, sp. Hartlaub, Bull. Mus. Comp. Zool., vol. 27, No. 4, 1895, p. 147, pi. 4, fig. 27 (Albatross 



sta. 3354). 

 Thaumatometra parvula A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 128 (listed); 



Crinoids of the Indian Ocean, 1912, p. 247 (synonj'my; Panama, 978 fms.). 

 Nepiometra parvula A. H. Clark, Journ. Washington Acad. Sci., vol. 7, No. 5, 1917, p. 130 (listed); 



Unstalked crinoids of the Siboga-Exped., 1918, p. 251 (in ke}'; range), p. 253 (references). 

 Trichometra europacifica H. L. Clark, Bull. American Mus. Nat. Hist., vol. 48, Art. 6, Oct. 5, 1923, 



p. 148 (Albatross sta. 5692). 



Diagnostic jeatures. — Fariometra parvula is the only species of the genus known 

 from the eastern Pacific. It seems to be closely related to F. alcyon, from which it 

 differs in having the centrodorsal an equilateral triangle in lateral view, and in having 

 the longest cirrus segments about 6 instead of 3 tunes as long as the median width. 

 From F. dione it differs in having the basal segments of Pi about as long as broad instead 

 of broader than long. From F. explicata and F. io it differs in havmg the IBr series 

 and lower brachials not in lateral contact. From F. scuiijera it differs in its much 

 shorter second brachials. The centrodorsal is smaller than that of F. obscura with 

 less swollen sides. 



At three of the four knowTi localities F. parvula was found associated with Floro- 

 metra serratissima. From the young of that species, which it much resembles in form 

 and color, it is easily distinguished by the conical centrodorsal, by the distal inter- 



