356 PROCEEDINGS OP THE ACADEMY OP 



GLYPTOCIDARIS A. Ag. 



Pores arranged as in Heliocidaris, in narrow, irregular rows; do not spread 

 near actinostome. Tubercles crenulated ; spines tapering, long. Two princi- 

 pal rows of interambulacral and ambulacral tubercles; miliaries not numerous. 



Glyptocidaris crendlaris A. Ag. 



Median interambulacral space bare ; tubercles increasing very gradually 

 towards the lower edge, where they are large. Four short rows of small 

 tubercles on lower surface. Spines long and stout, longitudinally striated, re- 

 semble those of the genus Acrocidaris. 



" Light brown or pale reddish brown. One specimen was greenish brown ; 

 another cream colored." 



" In 6 f. shelly bottom, comparatively rare. Hakodadi Bay, Isl. of Jesso." 

 (W. Stimpson.) 



Toxocidaris delalandi A. Ag., Bull. ilus. Comp. Zool., 1863. 



" Color reddish or purplish, sometimes brownish. Common about 1. w. m. 

 and in 4th 1., under stones. Port Jackson, N. S. W." (W. Stimpson.) 



Toxocidaris nuda A. Ag. 



Great size of the actinostome ; cuts not as deep as in other species of this 

 genus ; pores arranged in arcs of 5 1 pairs ; tubercles of interambulacral 

 space far apart, two rows very prominent, far exceeding in size the others ; 

 miliaries few and small; secondary tubercles small, equal in size to the am- 

 bulacral tubercles, which are arranged in two rows ; spines of dried specimens 

 of a bluish color. 



"Hilo, Hawaii." (W. Stimpson.) 



"N. E. end of Niphon." (W. Stimpson.) 



Toxocidaris crassispina A. Ag. 



Miliaries few in number ; ambulacral and interambulacral tubercles of 

 equal size ; spines long, equalling in length the diameter of the test ; coronal 

 plates high ; pores arranged in regular arches from 9 to 10 pairs, diminieh 

 in number on lower surface. 



".Color entirely black, except a little reddish below the mouth. Not uncom- 

 mon under stones and in crevices of rocks in 4th 1., Ly-ee-moon Passage, 

 near Hong Kong, China." (W. Stimpson.) 



" Yellowish, spines dark olive. In 25 f., among clean stones and nulli- 

 pores off the headland of Hakodadi, Isl. of Jesso, and N. E. end of Niphon." 

 (W. Stimpson.) 



Toxocidaris globulosa A. Ag. 



Primary and secondary tubercles of the same size ; outline globular; mili- 

 aries numerous ; poriferous zone broad, increasing in breadth ; pores arranged 

 in arcs of 8 or 9 pairs, near the mouth ; spines of dried specimens dark violet, 

 short and slender. 



"Keelung, Formosa." (W. Stimpson.) 



Toxocidaris depressa A. Ag. 



Remarkable for its extreme flatness on the lower surface and the great de- 

 pression of the polar diameter. Tubercles numerous, uniform in size ; coro- 

 nal plates long ; spines slender, rather short, scarcely equalling in length one 

 quarter of the diameter. Poriferous zone broad, as broad as the median 

 ambulacral space ; pores arranged in very slightly arched arcs of 6 to 1 pairs 

 of pores. 



"N. E. end of Niphon." (W. Stimpson.) 



Psammechinus subangulosus Ag., Cat. Rais. 



" Color reddish and brownish red of various shades. Very common in 4th 

 1. and at 1. w. m. on rocks, chiefly in crevices. Simon's Bay, Cape of Good 

 Hope." (W. Stimpson.) 



[Dec. 



