246 bulletin: museum of comparative zoology. 



Off Lae-o Ka Laau Light, Molokai, 23-24 fathoms. 

 Off Mokuhooniki Islet, Auau Channel, 13-43 fathoms. 

 Off Mokuhooniki Islet, Auau Channel, 32-43 fathoms. 

 Off Laysan Island, 20-30 fathoms. 

 French Frigate Shoal, 17-17^ fathoms. 

 Off Diamond Head, Oahu, 27-28 fathoms. 

 Off Diamond Head, Oahu, 27-29 fathoms. 

 Off Modu Manu, 33-71 fathoms. 

 Off Modu Manu, 21-24 fathoms. 

 4168. Off Modu Manu, 20-21 fathoms. 

 Sixteen specimens. 



Psammechinus paucispinus A. Ag. and Clark. 



This species differs very decidedly from the preceding, and from other allied 

 forms, in the small number of secondary and miliary spines and tubercles, and 

 yet the abactinal interambulacra are not bare, as in Toxopneustes semituberculatus. 

 The vertical sutures, especially in the interambulacra, are abactinally very distinct 

 and somewhat depressed. There is one large primary tubercle on each ambulacral 

 and interambulacral plate. Each ambulacral plate near the ambitus bears one 

 secondary and two miliary tubercles and each interambulacral plate has a large 

 secondary (or small primary) tubercle at each end aud carries five or six small 

 miliaries. The pore-pairs are in arcs of four. The abactinal system is about .33 

 of the diameter of the test, and only one ocular plate reaches the somewhat excen- 

 tric anal system. The actinal system is more than .50 of the diameter. The test 

 is whitish with a more or less pronounced green tinge when cleaned, while the 

 spines vary from white to deep pink; four of the five specimens appear decidedly 

 pink. 



Station 3872. Off Mokuhooniki Islet, Auau Channel, 32-43 fathoms. 

 3876. Off Lahaina Light, Maui, 28-43 fathoms. 

 4033. Off Diamond Head, Oahu, 28-29 fathoms. 

 4164. Off Modu Manu, 40-56 fathoms. 



Five specimens. 



Hipponoe variegata A. Ag. 



Cidaris variegata Leske, 1778. Kleins Nat. disp. Ech., p. 85. 

 Hipponoe variegata A. Agassiz, 1872. Rev. Ech. Plate 1, p. 135. 



A good series of this variable species was obtained; the largest is 145 mm. 

 in diameter and wholly white. 

 Honolulu. 



Puako Bay, Hawaii. 



Station 3876. Off Lahaina Light, Maui, 28-43 fathoms. 

 Twenty-seven specimens. 



