1(J{) BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



and the number of their segments does not exceed 10. The succeeding pinnules are 

 larger and have 15 segments; their length is almost equal to that of P D and Pi. 



In the living animal the cirri and arm bases arc bright saffron yellow which becomes 

 deeper and passes into light brown on the outer half of the arms. Koehler said that 

 this coloration is in part preserved in alcohol. 



Notes. — Dr. Clemens Hartlaub wrote that Antedon flava by virtue of the position 

 of the first brachial syzygy between brachials 2 + 3 is in the closest agreement with 

 A. porrecta which alone among the species of the Granulijera group possesses this 

 feature. He said that the chief difference between flava and porrecta — the length of 

 the cirri — did not seem so important to him as it had to Koehler. The cirri of flava are 

 much shorter than those of porrecta, about 35-38 mm. long. According to Carpenter's 

 figure the longest cirrus of porrecta is somewhat less than 55 mm. long and another is 

 barely 45 mm. long. The number of cirri in the two species does not differ — in porrecta 

 XX-XXX, in flava XXV-XXVI. The number of cirrus segments is less in flava (about 

 30) than in porrecta (40-50). The form of the outer cirrus segments according to the 

 figures is the same in both. The centrodorsals of the two species appear to show no 

 noteworthy differences. A "tuberosity mousse assez marquee" on the first two elements 

 of the IIBr series that Koehler describes in flava appears, according to Carpenter's 

 figure, to be lacking in porrecta. There are some differences in the position of the 

 second and following syzygies. The number of segments in P D is the same in each 

 (16-17 and about 15). In the form of the lower segments of P D there is apparently close 

 correspondence. This appears to be the case also in the relationship of the following 

 pinnules. In view of the great variability of the species of Antedon (in the, old sense) 

 it seemed to Hartlaub that the slight differences between porrecta and flava are scarcely 

 sufficient to justify the establishment of a new species. 



Localities— Huxley station 13; off Brittany (lat. 48°07'30" N., long. 8°13'00" W.); 

 753 meters; sand, mud, and hard ground; August 1906 [de Morgan, 1913; A. H. Clark, 

 191S, 1923; Mortensen, 1927; Koehler, 1927]. 



Caudan station 4; Bay of Biscay, west of La Rochelle (lat. 45°57' N., long. 6°21' 

 W.); 1,410 meters; coral and mud; August 21, 1895 [Koehler, 1895, 1896, 1927; Grieg, 

 1904; A. II. Clark, 1908, 1909, 1911, 1918, 1923; Hartlaub, 1912; de Morgan, 1913; 

 Mortensen, 1927] (1, U.S.N.M., 35583). 



Talisman; south of the Canary Islands (lat. 25°39' N., long. 18°22' W.); 882 

 meters; July 9, 1883 [Koehler and Vaney, 1910; A. H. Clark, 1911]. 



Geographical range. — From the northern part of the Bay of Biscay south to the 

 Canary Islands. 



Hi i tliy metrical range. — From 753 to 1,410 meters. 



History. — Prof. Rene Koehler described Antedon flava in 1895 from two specimens 

 dredged by the French steamer Cauulan at station 4 in August of the same year. He 

 Baid that A. flava belongs to the Granulifera group; like A. porrecta it has a syzygy in the 

 second brachial (that is, the first syzygy is between brachials 2 + 3), but is distin- 

 guished at a glance by the cirri, which are much shorter. In 1896 he gave a brief but 

 interesting account of the dredge haul at which the specimens were captured, which was 

 vrry near the spot where the Talisman had found Annacrinus wyvttle-thomsoni in great 

 abundance. He said that A. flava is remarkable for its superb sulphur yellow color, 



