9 2 



The UBr series only one present) is 4 (3 1 Hie ossicles ol the [Br series and the first 



t\\<> brachials have slight lateral extensions, and are broadly "wall-sided" as far as the base oi I',. 



The eleven arms are 90 mm. long. The first brachial is very short, about four times 



broad as long, only slightly wedge-shaped; the second is irregularly quadrate, about three 



times as broad as the median length; the third and fourth form a syzygial pair which is 



remarkable lor its extreme shortness, being about three times as broad as long, slightly longer 



inwardly than outwardly, the hypozygal oblong, the epizygal wedge-shaped ; the next four brachials 



are nearly oblong, with the distal border produced ; the following brachials are remarkably 



uniform, very short, slightly wedge-shaped, aboul tour times as broad as the median length, in 



the middle of the arm becoming about three times as broad as long, and at the arm tip about 



a^ long as broad. When the arm is viewed trom the side the dorsal profile of the brachials, 



though approximately straight, is seen to make a considerable angle with the axis of the arm 



that the profile of the arm as a whole is very strongly serrate. The prominent distal edges 



lials are verj finely spinous. 



1' is - mm. long with 22 segments, slender, becoming very delicate distally: the first 



groent is much broader than long, the following increasing in length and becoming about .is 

 long as broad on the eighth and twice as long as broad terminally. the second to fitth have a 

 high carinate process, the «rest of which is parallel with the longitudinal axis of the segments. 

 the tirst bears a similar, but less marked process: the sixth bears a triangular keel proximally 

 high as the keel on the preceding segment but running to a point distally: the sixth and 

 following segments increase in diameter from the proximal to the distal end. which makes the 

 latter very prominent; the segments bevond the eighth are low triangular in section, with a 

 more or less rounded dorsal ridge. 1'. is 9 mm. long with about 20 segments. similar to 1', 

 but slightly larger with proportionately slightly longer segments, these becoming about three 

 times as long as broad distally ; the second to fourth segments are carinate, like the second to fifth 

 in 1',: the fifth has a triangular keel like the sixth in P x ; the second and following segments 

 have the distal dorsal corner swollen and slightly produced. I' is 12 mm. long with tS or 19 



jments, much larger than the preceding; it tapers more rapidly in the first four segments 

 than beyond, and remains rather stilt" distally; the tirst segment is irregularly triangular, not 

 quite twice as broad as long, the second is approximatel) oblong, about twice as broad as Ion-, 

 the third is slightly broader than long, tin- fourth is about one third again as long as broad; 

 the following gradually increase in length, in the outer fourth of the pinnule becoming three 

 times as long as broad or even longer; the tirst segment bears a dorsal tubercle; the second- 

 fourth have a narrow straight edged carinate process; the fifth bears a narrowly carinate process 

 in the proximal half; on the second there is a slight projection of the dorsal distal angle which 

 rapidly increases in size, becoming on the fourth and following a very prominent, though narrow, 

 projection of the distal dorsal angle involving about the «.listal fourth of the dorsal edge, which 

 is armed with line spines. \\ is about 7 mm. long with 13 segments, and tapers more rapidly 

 in the first four segments than subsequently ; it resembles 1' but is proportionately smaller with 

 the projection of the distal dorsal angles of the segments much less marked and the proximal 

 ily very slightly carinate. 1' is o mm. Ion- with 1;, segments which become about 



