506 ME. p. H, CAEPENTER ON NEW 



the next one (on 4tli br.) is unusually large and massive, consisting 

 of 30 stout joints and reacliing 15 mm. in length. The next two 

 are smaller again and about equal to the first pinnule ; the fol- 

 lowing pair still smaller, after which the length gradually increases, 

 though it never much exceeds that of the first pinnule. 



Disk invisible ; diameter across the circle of distichal axillaries 

 13 mm. Colour brownish white, with traces of darker spots. 

 Sacculi rather scanty on the pinnule-ambulacra. Spread probably 

 about 15 centim. 



One specimen sine patria. 



BemarTcs. — This species is distinguished from the previous one 

 by the great disproportion in the sizes of the third and fourth 

 pinnules. It is much more marked than in Ant. Icevicmri, which 

 also differs in having more uuiform cirrus-joints, a longer interval 

 between the first two syzygia, and less marked forward projections 

 on the arm-joints. 



5. Antedon taeiipinna, n. sp. 



Description of an Individual. — Centrodorsal a moderately thick 

 convex disk, bearing about 25 cirri in a double row. These have 

 about 30 tolerably , uniform joints, of which the fifth is about 

 square, the next two or three a trifle longer than wide, and the 

 following ones shorter again. From about the twelfth onwards 

 the joints have rather sharp dorsal spines, that on the penul- 

 timate being considerably larger than its predecessors. First 

 radials partially visible; the second oblong, short and wide, 

 partly united laterally. Axillaries also short, but little longer 

 than the preceding joints, and pentagonal with very open 

 angles. 



23 arms, some rays dividing thrice ; primary arms of three 

 joints with somewhat uneven edges, the last being axillary with 

 a syzygy. Secondary arms of two joints, the axillary not a syzygy. 

 The first joints after each division rhomboidal and closely united 

 laterally. Second brachial bluntly wedge-shaped. Third (sy- 

 zygy) and four next joints short and oblong. The following ones 

 short, bluntly wedge-shaped, and overlapping rather strongly, so 

 as to give the arms a serrate appearance ; becoming more oblong 

 again about the middle of the arm. 



First syzygy on third brachial ; the next between 19 and 25, 

 then an interval of 7-12 joints, usually 9 or 10, between successive 

 syzygia. 



The size of the lower pinnules varies considerably according as 



