32 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



EDDIOCRINIDAE 



Eudiocrinus indivisus. In a specimen with arms about 70 mm. long the IBr 2 

 has on the proximal end 16-17 septa. The third brachial has on the distal end 21 

 septa that are very low, especially toward the center, with the degree of strength 2; 

 the areola is indistinct. 



HlMEROMETRIDAE 



Himerometra magnipinna. In a specimen with arms 105 mm. long the IIIBr 3 

 has 35 septa, becoming rather indistinctly marked toward the areola, which is also 

 indistinct and situated in a central concavity; the degree of strength is 2. 



Heterometra crenulata. In a specimen with arms about 95 mm. long the distal 

 end of the third brachial has 41 septa; there are two stout ventral beams and about 7 

 complete septa; the intervals between the septa are rather narrow; the areola is 

 narrow and rather indistinct ; the degree of strength is (2 ) 3 . The sixteenth brachial 

 (second hypozygal) has 48 septa, of which about 13 are complete; there are two 

 ventral beams. The thirty-first brachial (third hypozygal) has 50 septa. 



MARIAMETBIDAE 



Stephanometra spicata.In a specimen with the arms 135 mm. long the distal 

 end of the third brachial has 31 septa, one complete and two ventral beams, with the 

 degree of strength 3. On another third brachial there are 29 septa, of which 2 are 

 complete; the areola is narrow, but rather distinct. 



Liparometra grandis. In a specimen with arms about 120 mm. long the third 

 brachial has 37 septa, 10 complete and 2 represented by indistinct ventral beams, the 

 degree of strength being 3; the areola is distinct. The ninth brachial has 31 septa. 



Lamprometra palmata. In a specimen with an arm length of 90 mm. the third 

 brachial (following a IVBr axillary) has 24 septa, 6 complete and 2 ventral beams; 

 the areola is distinct and of medium breadth; the degree of strength is 4. In another 

 case there are 23 septa. The twenty-second brachial (second hypozygal) has 22 septa. 

 The thirty-third brachial (third hypozygal) has 24 septa, 5 complete and 2 incomplete 

 ventral beams. The distal syzygies, from about the one hundredth to about the 

 one hundred and tenth brachials, or about the tenth hypozygal, have 16 incomplete 

 septa. The hypozygal following has 14 incomplete septa, with the degree of strength 

 (l-)2. _ 



Mariametra subcarinata. In a specimen with arms 60 mm. long the third brachial 

 has 15 septa, including 2 complete septa and one ventral beam, with the degree of 

 strength 4-3. In other cases the septa are 15, 16, 16, with 3, 5, and 6 complete septa. 

 The areola is rather narrow, but usually stout. 



COLOBOMETRIDAE 



Pontiometra andersoni. In a specimen with the arms about 160 mm. long the 

 third brachial, following a VBr axillary, has 36 septa, of which 5 are complete and 2 

 are ventral beams, with the degree of strength 4. In other cases the third brachial, 

 following IVBr and VBr axillaries, has 37, 39, and 39 septa. The areola is stout, 

 well marked, and of medium width. 



