86 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



which is not raised or otherwise modified, along the middle of the dorsal side. The 

 distal ends of the segments are perfectly smooth and unmodified. 



Pj is 5-6 mm. long with 9 or 10 segments. It resembles PI, but is larger and 

 stouter. The first segment and usually also the basal third of the second are carinate. 

 P 3 is 3 mm. long with 9 segments. It is slightly less broad basally than P,, and it 

 tapers rapidly and evenly from the distal end of the second segment to the tip. The 

 first two segments are carinate. P 4 is 3.2 mm. long and tapers evenly from the base 

 to the tip. In its basal half, beyond the second segment, it is nearly twice as broad 

 as P 3 as a result of the broadening of the second-fifth segments which are expanded 

 to protect the gonads. The pinnule is strongly prismatic. The following pinnules 

 are similar to P 4 , slowing increasing hi length and gradually losing the expansion of 

 the earlier segments. The distal pinnules are 7.5-8 mm. long with about 20 segments 

 most of which are from two to three times as long as broad. The distal ends of the 

 segments are slightly prominent. 



The color, freshly preserved in alcohol, is white with the arms, pinnules, and 

 cirri with occasional narrow bands or small and usually rounded spots of bright 

 pinkish red ; or, brownish yellow, with the cirri and pinnules more or less extensively 

 marked with white. 



Notes. The preceding description is based upon 18 specimens from Caroline 

 station 78. 



The type specimen from Albatross station 2146 was described by the author as 

 follows: 



The centrodorsal is thick discoidal with a rather large bare polar area and bears 

 two irregular marginal rows of cirri. 



The cirri are about XX, 15-17 (usually 15 or 16), 5 mm. long. The first segment 

 is very short, the second is rather more than half as long as broad, and the remainder 

 are about as long as broad. The second and third segments bear on the distal edge a 

 sharp dorsal spine (as seen in lateral view) which after one or two segments moves to 

 the middle of the dorsal side. The opposing spine is rather less than the width of the 

 penultimate segment in length and stands out vertically from the middle of the dorsal 

 side. The terminal claw is not quite so long as the penultimate segment and is stout 

 and strongly curved. 



The radials are visible beyond the rim of the centrodorsal, though very short. 



The IBr! are oblong, about twice as broad as long, slightly concave distally, and 

 just in appostition laterally though not laterally flattened. The IBr 2 (axillaries) are 

 pentagonal, about as long as broad. 



The 10 arms are probably about 25 mm. long. The first brachials are wedge- 

 shaped with the shorter inner sides united for about the proximal two-thirds. The 

 second brachials are larger, and are irregular in shape. The brachials following are 

 squarish, gradually becoming wedge-shaped and more obliquely wedge-shaped after 

 the twelfth, when they are about as long as broad. 



Syzygies occur between brachials 3 +4, 9 + 10, and 14+15, and distally at intervals 

 of 3 muscular articulations. 



PI 5 mm. long with 6 segments of which the first is short but distally produced into 

 a rounded projection, the second is rather more than twice as long as broad, and the 

 remainder are greatly elongated. P 2 is similar to P! and equally stout basally, but not 



