> 
AGASSIZ: PRELIMINARY REPORT ON THE ECHINI. te 
geographical distribution, as well as a wide bathymetrical range.! This 
will serve to show the extent to which many species can slowly migrate 
upon the bottom, even at a very considerable distance from land or con- 
tinental or insular slopes, when living in the track of a great equatorial 
current which supplies them with a constant and abundant supply of 
food. 
DESMOSTICHA, HAECKEL. 
CIDARIDÆ, Mttt. 
GONIOCIDARID At, Hazroreı. 
Dorocidaris panamensis A. Aa. 
Plate I ; Plate II. Fig. 1. 
The test of this species is greatly flattened; the primary radioles are short, in 
many specimens not longer than the diameter of the test; they are compara- 
tively slender but with a coarser granulation than in the Atlantic species (D. 
papillata). ‘The abactinal system is also smaller, the anal system more pentag- 
onal, and the genital plates more elongate than in the D. papillata, and the 
actinal spines are smaller than in that species, 
Station No. 3367, off Cocos Island, 100 fathoms. 
rs “ 3368, off Cocos Island, 66 fathoms. 
Li “ 3378, off Galera Point, 112 fathoms. 
ik “ 3397, off Galera Point, 85 fathoms. 
Goniocidaris Doederleini A. Aa. 
Plate III. Fig. 1. 
The nearest ally of this species is G. canaliculata, from which it is readily 
distinguished by the greater flatness of the test and the very slender primary 
tenera. Range in fathoms. Genera. Range in fathoms. 
+. Dorogidane ite- au e O Eppan e ee A al 
LOLA ue vw LE A Shen ON 
GOD... 0 holy fs) Pourtalesia, 4. u a + 0880 
SALIA u a A a a Homolampas. . . +. . 1600 
Pododidaria +... 11.7 1076 A eg OU 
Colopleurus. . 4. . . 1898 WCHINOCATGIUM + s « . 2075 
Aspidodiadema . . . . 1800 HOM... à « 400 
Dermatodiadema . . . 800 STISSODEIG u... ey 0 0008 
PROMO DO ARO ss « 000) 
Temnechinus , , . . 600 a ee. ONU 
Diigonocidaris. y 400 dt 5 so 4000 008 
Holinusan ern edo PA NV a N a 0 
Spherechinus . . . . 400 a er‘ 
