mi BULLETIN B2, UNITED STATES NATIONAL MUSEUM 



The lower pinnules are equally long on all the arms, and on individual arms are 

 as long on the inner as on the outer side. They are slender and gradually tapering. 

 The pinnules of the first pair are mostly ahout as long as those of the second. These 

 last are always somewhat thicker; they measure about 11 mm. in length and are 

 composed of about 20 fairly equal segments, of which most are as a rtde somewhat 

 longer than broad. The following three or four pairs decrease in length and in the 

 number of their component segments. The smallest pinnule is about 5 mm. long. 

 The pinnules succeeding slowly increase in size, finally reaching a length of 10 mm. 



The disk is about 10 mm. in diameter and is strongly incised. The sacculi are 

 closely crowded on the pinnules. 



The color is uniform gray-brown, sometimes with a touch of green, the cirri 

 lighter, and the disk dark blackish gray. 



Notes. — The preceding description is adapted from Hartlaub's original descrip- 

 tion of the species. I have examined both of Hartlaub's specimens, one of which is 

 now in the United States National Museum. 



The specimen from Albatross station 5413 was described as a new species under 

 the name of Selenemetra viridis as follows: The cirri are XXXIII, 47-57, from 30 to 

 35 mill, long, and rather slender. Sharp dorsal spines are developed from the tenth 

 or twelfth segment — a more or less marked transition segment — onward. The calyx 

 and arm bases resemble those of S. gracilipes { = Ox)/metra finschii), but the division 

 series mid first ten brachials are sharply flattened laterally. The 40 arms are 90 mm. 

 long. Pi is slender, 10 mm. long, with 19 segments, which become twice as long as 

 broad distally. P 2 and P 3 are similar, 12 mm. long, with 21 segments, slightly stiffer 

 than P, and proportionately stouter. P 4 is 9 mm. long, with 18 segments; it is as 

 slender as Pi but slightly stiffer. P 6 is 7 mm. long and resembles P 4 . P 6 is 5.5 mm. 

 long and resembles P 6 but is less stiffened. P 7 and the following pinnules are 5 mm. 

 long; their component segments are proportionately slightly shorter than are those 

 of the pinnules preceding. The distal pinnules are very slender and reach 7 mm. in 

 length. The color is greenish yellow. 



The specimen from Albatross station 5163 was described as a new species under 

 the name of Himerometra gracilipes in the following terms: The centrodorsal is a thick 

 disk with a small flat polar area. The cirri are arranged in two and a partial third 

 crowded, irregular, and more or less alternating rows. The cirri are XIX, 41-52 

 (usually about 50), 35 to 40 mm. in length. The first segment is about twice as 

 broad as long, and those following gradually increase in length to the fifth or sixth 

 which is about as long as broad. The succeeding segments remain the same, or become 

 slightly longer than broad, to about the twenty-sixth, then gradually become shorter, 

 about half again as broad as long. After the twentieth to the twenty-second segment 

 dorsal spines gradually begin to develop; these, however, never become very large. 

 The opposing spine is terminal, erect, and about half as long as the width of the 

 penultimate segment. The terminal claw is longer than the penultimate segment 

 and is slender and moderately curved. 



The radials are very prominent and are about twice as broad as long; their dorsal 

 surface is parallel with the dorsoventral axis of the animal. Each radial bears a 

 low, rounded posterolateral tubercle on each side. The IBr! are trapezoidal, about 

 three times as broad as long proximally and twice as broad as long distally; they 



