AGASSIZ AND CLARK: REPORT ON ECHINI. 259 



Station 3836. Off Lae-o Ka Laau Light, Molokai, 238-255 fathoms. 

 3839. OIF Lae-o Ka Laau Light, Molokai, 259-266 fathoms. 

 Six specimens. 



Aceste purpurea A. Ac and Clark. 



This species differs from the preceding in the shape of the fasciolc and in color. 

 The fasciole is somewhat angular, though the angles are rounded, and the enclosed 

 area is abruptly widened just behind the middle of its course. The general color is 

 pale purple, with the fasciole a very deep purple. A small specimen, only 13 mm. 

 long, from St. 3898, has this same coloration, and, although the fasciole has no prom- 

 inent angles, is evidently this species. The largest specimen is nearly 22 mm. long. 



Station 3898. Off Mokuhooniki Islet, Pailolo Channel, 258-284 fathoms. 

 " 4041. Off Kawaihae Light, Hawaii, 253-382 fathoms. 



Three specimens. 



Schizaster japonieus A. Ag. 



Schizaster japonieus A. Agassiz, 1879. Proc. Amer. Acad., 14, p. 212. 



A very small Spatangoid, only a trifle over 8 mm. in length, is evidently a 

 Schizaster, and in the appearance of the petals is more like japonica than it is like 

 any other described species. 



Station 4064. Off Kauhola Light, Hawaii, 63-107 fathoms. 



Periaster maximus A. Ag. and Clark. 



Although there is in the collection only a single fragment of this Spatangoid, it 

 shows such great size for a Periaster and such unique features, we feel justified in 

 giving it a name. The fragment is the posterior left-hand quarter, approximately, 

 of the abactinal part of the test and includes the left posterior petal and most of 

 the right one too. The anal system is also present, but no part of the test below 

 it. A perfectly bare band, two millimeters wide, runs from the posterior part of 

 the peripetalous fasciole, in the median line, straight to the anal system. This 

 band is nearly 50 mm. long. The petals are 18 mm. long by 6 mm. wide. The 

 anal system is 11 mm. across horizontally. The shape of this species was appar- 

 ently more like limicola than like tenuis, and if we calculate its dimensions by 

 proportion, comparing it with a specimen of limicola 65 mm. long, we find that, 

 unless the shape was very different from that species, this individual must have 

 been about 110 mm. long, 105 mm. wide, and 95 mm. high. The color is very 

 light brown. There are some large primary tubercles in the interambulacra, 

 within the fasciole. 



Station 4130. Off Hanamaulu, Kauai, 283-309 fathoms. 



