OB LITTLE-KNOWN COMATULJE . 505 



Oue specimen sinepatria. Spread about 20 centim. 



Hemarl's. — This species comes very near to Anf. Icevicirra of 

 the Ley den Museum. It differs, however, in having more nu- 

 merous cirri, the second radials less closely united, and shorter 

 axillaries. The lovrer and middle arm -joints are relatively shorter, 

 and the two pinnules of the second pair (on 4 and 5 brachials) are 

 more nearly equal than in A. Icsvicirra ; while the terminal pin- 

 nules are much more delicate and less clothed witb perisome. 



The colouring is not unlike that of Ant. limaculata , also in the 

 Leyden collection ; but in this species the third pinnule on the 

 outside of the arm (ou 6th br.) is larger tlian the second, while the 

 reverse is the case in Ant. ceqiii-pinncf . 



4, Antedon impaeipinna, u. sp. 



Description of an Individual. — Centrodorsal a convex disk with 

 a slightly hollowed dorsal pole and two or three rows of cirri on 

 its sloping sides. 35 cirri of 25-28 smootb thick joints, o£ which 

 the sixth is about square and the following ones longer than 

 broad, becoming shorter again towards the end ; the penultimate 

 bears a very faint blunt spine. 



Pirst radials jjartially visible at some of the angles of the calyx; 

 the second, widely hexagonal, partly united laterall}''. Axillaries 

 Qot one and a half times their length, pentagonal, with wide distal 

 angles. The Hues of junction of the axillaries with the joints 

 above and below them are narrower than the joints themselves, 

 so as to give tbe sides of the rays a somewhat jagged appearance. 



38 arms, the rays dividing thrice ; each division of two joints, 

 the first almost completely united laterally and the axillary not a 

 syzygy. Pirst brachials almost rhomboidal, relatively long and 

 narrow, closely united to their fellows. Second joints shorter 

 and more wedge-shaped, longer on the outer than on the inner 

 side. Third joint a syzygy and oblong. The next four nearly 

 so, but shorter. The following ones longer, thougli still short, 

 smooth, and sharply wedge-shaped, considerably wider than long. 

 About the middle of the arm they become blunter, with forward 

 projections alternately ou opposite sides, and are squarer towards 

 the ends. 



The first syzygy is on the third brachial, and the next usually 

 from 12-14, after which the syzygial interval is from 8-10 joints. 



The second brachial bears a moderately long pinnule, tapering 

 away rapidly after the basal joints, which are relatively rather 

 large. That on the third brachial is considerably smaller, but 



