1Q8 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



3+4, but the next is far out on the arm beyond the thirtieth brachial, and there are 

 very few all together. 



This specimen (dry) is dull gray-brown variegated and spotted with a hght 

 yellow-brown; there is much less of the hght color than there is in the other specimen. 



In his field notes Dr. Clark wrote that these specimens "seemed almost black 

 with dorsal side of arms cream white. Very handsome. Died on way home and 

 never relaxed, hence are poor specimens." He said that in several points this hand- 

 some species (variegata) suggests Ahtedon clarae Hartlaub "and I have tried to con- 

 vince myseK that it should be called by that name, but the type of that East Indian 

 form was much larger than the Darwin specimens, yet had only 12 arms. It also 

 had much longer cirri and the colors and color pattern were totally different. It 

 seems best, therefore, to keep the Australian species separate." He did not compare 

 his new species with the Australian heliantlioides. 



Under the name Petasometra bremcirra he described a specimen from False Cape 

 Bossut. In this the centrodorsal is thin discoidal with a broad flat dorsal pole about 

 3 mm. in diameter. The cirrus sockets are arranged hi a single closely crowded 

 marginal row. 



The cirri are XXI, 18-22, about 9 mm. long, and somewhat recurved. The 

 cirrus segments are subequal in length, but when viewed dorsally the fourth and fifth 

 are much the broadest, the third and sixth somewhat narrower, the second and first 

 about equal, or the first narrower. Beyond the sixth the segments decrease sUghtly 

 but steadily in width until the terminal segments are no broader than long. The 

 dorsal transverse ridge, characteristic of the genus, is present near the middle of each 

 segment, but is not well marked until after the fifth and never becomes spiniform 

 imtil the penultimate segment on which the opposing spine is fairly well developed. 



The radials are concealed. The IBri are well developed, about two and one-half 

 times as broad as long. The IBr2 (axillaries) are large, broadly pentagonal, the width 

 not twice the height. Of the five IIBr series, four are 4 (3 + 4) and one is 2. The 

 division series are all well rounded, and, except for the proximal half of the first 

 elements, distinctly separated from each other. 



The 15 arms are 45-60 mm. long. The first brachials are noticeably rounded, 

 somewhat higher externally than internally where they are in contact for half their 

 length or more. The second brachials are very similar and the two together are 

 somewhat higher than the third and fourth, which are united by syzygy. The third- 

 seventh brachials are as high an one side as on the other, but from the eighth onward 

 they are more wedge-shaped, though they never become nearly triangular. 



The first syzygy is between brachials 3+4, the second occurs after an interval 

 of about 13 brachials (14 muscular articulations), and the following after about 8 (9). 



Pd is about 8 mm. long, rather stout, with about 20 segments. The basal seg- 

 ments are about as broad as long and relatively large, but those following diminish 

 rapidly in size; the distal portion of the pinnule is terete and slender, though by no 

 means flagellate or even delicate. P, is very similar, a trifle longer perhaps, with 

 about 23 segments. Pj is similar, but a httle smafler. P3 is distinctly smaller with 

 about 15 segments, but the transition from Pj to P3 is neither abrupt nor striking. 

 Subsequent pinnules are not essentiafly different, but ultimately become longer and 



