334 Mr. F. J. Bell on two new Species of Asteroidea. 
upper edge of the side of the arm ; a few small spines are de- 
veloped in the intermediate space. In addition to a not irre- 
gular row of spines which extends along the middle line of the 
abactinal surface, there are two irregular rows or lines of 
shorter spines on either side; all these spines are fairly strong, 
and all quite blunt at their tips. The disk is pretty thickly 
covered with spines. 
Colour (after thirty years in spirit) creamy white, the 
suckers a little darker. 
Y=49:7=10, or R is nearly equal to 57. 
Breadth of arms at base 9 millim., greatest breadth 11. 
Hab, Kcuador. 
The description has been drawn up from a single specimen; 
others, not so well preserved, give the definite locality, and 
all were obtained from the collection of Haslar Hospital. 
Standing nearer, perhaps, to _A. Brandti than to any other 
species, d. nautarum is distinguished not only by its much 
shorter arms and stouter habit, its better developed though less 
numerous spines, but also by the fact that the skin-plates on 
which the spines stand are not so sharply separated from one 
another, so regularly set, or so well provided with granules, 
as in the more southern species from the Straits of Magellan. 
From A. ¢rermis, which, like it, comes trom the coasts of 
Kcuador, the new species is at once distinguished by its 
smaller disk, its longer arms, and its stronger stouter spines. 
Culcita acutispinosa. 
Resembling C. coriacea, and distinguished from all other 
species of the genus by the fact that the apices of the upturned 
ambulacra are below the level of the dorsal or abactinal sur- 
face. ‘The body is almost completely discoidal in shape, the 
angles of the rays being very nearly altogether rounded off ; 
the sides of the disk are very deep ; in the dry specimens, at 
any rate, the actinal surface gradually slopes downwards, so 
that the animal is very much deeper along a line drawn dorgo- 
ventrally through the actinostome than it is at the margin of 
the disk (62-40 millim.). 
The adambulacral spines are in two rows; in the inner 
there are ordinarily four on each plate, and they are not so 
weil developed as in some allied species ; about five plates out 
from the actinostome they measure about 5 millim. in length. 
In the outer row there are generally two spines, one of which 
is very strong and blunt, while the other is much smaller, 
The spines on the intermediate plates sometimes lie quite 
close to the outer interambulacral series, and occasionally 
appear to invade it. 
