142 Bulletin, Vanderbilt Marine Museum, Vol. IV 



dredged off Charleston Harbor, S. C, and deposited in the Charleston 

 Museum. 



Distribution : A deep-water species. In addition to the type speci- 

 mens, a single specimen was dredged by the "Blake" in 84 fms., on 

 Yucatan Bank, also one on the west Florida Bank, in 14 fms. It 

 was not taken by the "Fish Hawk" in the extensive dredgings of the 

 Porto Rican Survey. 



Material examined: Two specimens, dredged in 70 fms., south 



of Marquesas Keys, Florida, March 2, 1924, by the "Am," Cat. 

 no. 296. 



Color : Agassiz states that the broad, bare bands of the ambulacral 

 area are colored light yellow, giving this species a striking appearance. 

 The spines are greenish yellow on the smaller specimens and in the 

 larger specimen the color was duller. 



Technical description: The specimen is 97 mm. long and in con- 

 tour is equilaterally pentagonal with the angles evenly rounded, with 

 the central portion of the test abruptly elevated from the extremity 

 of the ambulacral rosette; the entire actinal surface is flat, and the 

 ambulacral areas are marked by furrows which are most sharply 

 defined on their inner four-fifths of their length, but which are quite 

 distinct to the margin and continued on the abactinal surface as a 

 well-defined narrow line running inward to the central plate. The 

 margin of the test is quite thick and rounded. The ambulacral rosette 

 is not elevated but is flush with the rest of the test. The petals are 

 symmetrically placed and are well defined by the position of the 

 respiratory tube-feet. The petals widen distally and have the ends 

 well separated. The ambulacral rosette extends to within one-third 

 the distance of the apex from the edge. The peristome is small, 

 sunken ; the five teeth are stout and very broadly rounded. The spines 

 around the peristome are 3 to 3.5 mm. long, slender, tapered distally 

 and regularly striated. The actinal and abactinal surfaces are regu- 

 larly covered with short spines; the primaries like those around the 

 peristome with large, node-like tubercles on the test. The secondaries 

 are similar to the primaries but are much more abundant and much 

 slenderer. 



The large tridentate pedicellariae are scarce on the two dried speci- 

 mens before me, but this may be due to handling. The head is shaped 

 elongate, with the tips of the valves dentate. 



The gemmiform pedicellariae are smaller and more abundant, each 

 having the shape of an elongate bud. 



