REPORT ON THE CRINOIDEA. 187 



Locality.-— Station 219, March 10, 1875; lat. 1° 54' 0" EL, long. 146° 39' 40" E.; 

 150 fathoms ; coral mud. One specimen, and one varietal form. 



Remarks. — Besides this one mutilated individual (PI. XXX. fig. 4) Station 219 also 

 yielded another, which I at first regarded as belonging to a different specific type; and 

 it was accordingly represented on PI. XXXIII. figs. 4, 5, as Antedon notata. Probably, 

 however, it would be better considered as a varietal form of Antedon tenuicirra ; though 

 it presents some not unimportant differences from the type specimen described above. 

 Although of larger size, it shows more of the first radials, while the axillaries have 

 sharper proximal angles, and the second radials are therefore more incised. There are 

 slight indications of lateral flattening upon the four lower brachials, and the joints of 

 the first pinnule are relatively longer than in the type. The cirri are both more 

 numerous and have a larger number of joints than in the type (PL XXX. fig. 4 ; 

 PI. XXXIII. fig. 4) ; but the joints have the same smooth elongated character in both 

 forms ; and until better-preserved material is available, it will probably be safer to regard 

 them as specifically identical. The smooth and delicate long-jointed cirri and the difference 

 in shape of the joints composing the first and second pinnules respectively separate 

 the type very clearly from the species previously described. All the pinnules are much 

 broken, but the basal portions of the first two are very different, as seen in PL XXX. 

 figs. 5, 6. The lowest joints of the first pinnule recall those of the corresponding 

 pinnules in Antedon quadrata and its allies (PL XXVII. figs. 8, 14), but the later 

 joints are distinctly longer than wide, though not greatly so. In the second 

 pinnule, however (PL XXX. fig. 6), the component joints are stouter, and all except the 

 first two are distinctly longer than wide, as is the case in its successors (PL XXX. fig. 7). 



12. Antedon kevis, n. sp. (PL XXXI. fig. 6). 

 Specific formula — A.y. 



Description of an Individual. — Centro-dorsal hemispherical, covered with a cluster 

 of about thirty cirri with some twenty -five to thirty joints, but few of which are longer 

 than wide. The distal joints have a faint dorsal keel which passes into a small opposing 

 spine on the penultimate. 



Three radials visible ; the first short, and the second rather sharply convex ; axillaries 

 rhombic, about as wide as long. Ten arms ; first brachials nearly oblong, and but little 

 incised by the second, which are irregularly quadrate. The next joints are nearly oblong 

 till the second syzygy, and the following ones smooth and obliquely quadrate, gradually 

 becoming longer than wide. Syzygies in the third, eighth, and twelfth brachials, and 

 then at intervals of two joints. 



