518 ME. V. U. CARPEJTTEIl ON NEW 



Ten arms of 200 joints, rather more than 3 mm. wide at the 

 third brachial, but increasing to 5 mm. by the twelfth joint, 

 remaining uniform to a short distance, and then tapering to the 

 ends. 



Eirst two brachials united by syzygy, and together twice as wide 

 as their outer side, which is slightly the longer, though the hypozygal 

 (on 1st br.) is longer at its inner side, which is very closely 

 united to its fellovr. EjDizygal (on 2nd br.) acutely triangular, 

 with curved sides, half as long as broad. Third brachial a syzygy, 

 roughly oblong, with a somewhat raised forward projection from 

 the inner part of its distal edge ; and the fourth brachial has a 

 corresponding elevation at the inner side of its proximal edge, so 

 as to give a somewhat tubercular appearance to the line of junc- 

 tion. The same feature is visible on the outer part of the line of 

 junction between the nearly oblong fourth and fifth brachials, and 

 recurs alternately on opposite sides of the arm for a few joints fur- 

 ther. As the joints become flatter and more triangular, with curved 

 edges, it gradually disappears. They are rather more than balf as 

 long as wide, with a veiy faint, slightly raised median line, and 

 retain the triangular shape and curved edges as far as the 160fch 

 joint, narrowing and becoming blunter at the esti'eme ends of 

 the arms. 



Syzygia on the third and tenth brachials ; then an interval of 

 3-6, usually 4 or 5, joints between successive syzygia, the hypo- 

 zygals being very short. 



The first pair of pinnules borne on the epizygals of the two 

 lowest syzygial joints are long (25 mm.), and moderately stout, 

 consisting of about 60 joints, of which the first three or four 

 are nearly square. The following ones are shorter and more ob- 

 long, and gradually decrease in width, the outer edges of the last 

 30 bearing the strong lancet-shaped processes forming the ter- 

 minal comb. The second pair of pinnules are smaller with fewer 

 joints, only the first two of which are about square, while they 

 have no dorsal keels. They also have a well-marked terminal 

 comb ; but this appears to be wanting on the pinnules of the third 

 pair, which are still smaller, with short and wide triangular basal 

 joints. The fourth pair as long or longer than the third, but 

 stouter, with wider and more massive joints. The following pin- 

 nules increase in both length and stoutness, consisting of about 

 30 joints, the first half of which are about twice as wide (2 mm.) 

 as long, with sharpened dorsal edges which are sometimes pro- 



