186 BULLETIN OF THE 
from the shape of the spines. For, certainly, if the present species had been 
dredged without its two or three huge fan-shaped spines, it would have been 
placed in the genus Dorocidaris, and have been undoubtedly referred to papil- 
lata or to its Florida variety, D. abyssicola, while the isolated fan-shaped spines so 
nearly identical in shape to those of the Jurassic Rhabdocidaris (Phyllacanthus 
Br.) remus Des. would unhesitatingly have been referred to that genus. This 
merely shows how little we are as yet able to determine, among the Oidaride, 
the value of either generic or specific characters, and we must possess far more 
material from among the fossil species, especially in the way of spines associ- 
ated with their tests, before we can make thé much needed accurate revision of 
the group of Cidaride. In the few specimens dredged by Captain Sigsbee 
there are none of the spines showing a passage from those considered thus far 
as characteristic of Dorocidaris, and the peculiar fan-shaped spines, of which 
there are from two to three on each specimen. 
The scrobicular ring is edged by a row of larger secondary tubercles, the 
ambulacral area is flexuous, the poriferous zone nearly as broad as the median 
ambulacral area, the primary tubercles are not crenulate, mammary boss large ; 
the scrobicular areas well separated by the secondary and miliary tubercles, 
not confluent even towards actinal extremity. In the specimen figured [nat- 
ural size in Plate IV.] there are six primary tubercles in the interambulacral 
area. The actinal area is smaller than the abactinal system. The ornamenta- 
tion of the fan-shaped spines is similar to that of the cylindrical spines, the 
rows of spinules becoming gradually changed into serrations spreading more 
and more and becoming somewhat less prominent towards the extremity, rows 
of smaller serrations being intercolated as the radioles spread. 
The broad end of the fan-shaped radioles is sometimes slightly concave. 
When alive, these Echini were of a brilliant vermilion color. 
(Sigsbee.) Off Havana. Lat. 22° 11! N., Long. 82? 21 W. 243-450 fms. 
ii Lat 22° 09 N., Long. 82? 23! W. 158 fms. 
" Off Havana. 242 fms. 
i: Off Havana. 175 fms. 
m Off Havana. Lat. 22? 09' N., Long. 82° 21 W. 242 fms. 
A spine closely allieđ to those of Goniocidaris bispinosa was brought up from 
242 fathoms, in Lat. 22° 09 30 N., Long. 82° 11 30 W. Unfortunately no. 
test of Cidaris came up in the haul. This spine is different from those of any 
of the specimens of Cidaris thus far dredged either by Mr. Pourtalds or myself. 
Salenia varispina A. Aa. 
T still retain this species in the genus Salenia, notwithstanding Dr. Duncan 
has proposed to remove it to Peltastes. As I have already stated in the Re- 
vision of the Echini, and in the Bull. M. C. Z. when first describing this species, 
it differs somewhat from Salenia proper, but certainly it does not belong to the 
group of Salenide to which Peltastes is associated, in which the subanal plate is 
placed directly opposite one of the genital plates, while in all the recent Sale- 
