\-I M.mII.KA 01 NOBIS PACIFU 'All AIU.M I.N'I WATIRfi [43 



Mouth plates relatively small, with two unequal, apical and one longer, Blender, 

 tapered Buboral spine As the animal grows larger, the actinoatome becomea more 

 sunken and the mouth plates relatively inconspicuous. The tube feel are crowded 

 shout the mouth, and the entrance to the furrow i- only about as vide sa the breadth 

 of the combined mouth plates. It widens rapidly, reaching tin- maximum width 

 at the sixth or seventh adambulacral plate 



The papular areas vary enormously with imen. In giant examples 



the whole abactinal surface as well as the lateral and actinal channela are ■ mac 

 small papulae cloeelj packed in larger areas (with aarrow skeletal trabecuiae sepa- 

 rating them). In medium-sised examples the papulae are also numerous, but the 

 areas are relatively smaller, though closely placed. 



Straight pediceUariae pi 68, ti'_ r I inconspicuous, compressed, broadly la: 

 late, largest in lateral and actinal channels; absent it few on dorsal surface. They 



OOCUr 00 the oral and adaliihulaeral spines, and QOt Very numerously on the furrow 



face of the adambulacral plates; length 0.5 to 0.8 mm. 



< tossed pedicellariae ' pi. 68, figs i . I a \ ery numerous around the spines, among 



the papulae, and on the surface of the plates between the areas, u here they have well- 

 developed peduncles. Spine wreaths on big specimens very thick. They are com- 

 plete on the abactinal and both series of marginal spines: on actinal ami adambu- 

 lacral Bpinea the pedicellariae are in clusters Abactinal pedicellariae 0.27 to 

 mm. long. Larger actinal and adambulacral pedicellariae, 0.31 to 0.36 mm. long. 



Color in life, v aria Kle. A small specimen from Departure Hay, British Columbia, 

 gray green A medium-cued specimen, general tint plumbeous, the papular ai 

 reddish brown; actinal Burface Beah color. 



Madreporic body prominent, slightly convex, with fine, intricate -trine sit'; 



about mid r. 



) Verj small specimens resemble i ad /■.■■'■ Th< mall- 



sample (Orcas, San Juan Islands, Wash.) baa K only '.' mm., hut there is already 



I series of actinal plates and spines. The young are rather easily recognized BS 

 they have the peculiarities of the adult, even greater discrepancy in si/e between 



the two sorts of -pim~ The larger Bpinea an capitate, Btriate, subtruncate, and 

 form a very definite carina! series, with a few scattered dorsolaterals. There 

 regular series of superomarginals, of inferomarginals, and of actinals, the latter not 

 extending the entire length of the ray. 



Type iiiul t<ipi locality. That of species 



/.'. marks. — Although only the distal part of a ray of Stimpaon's type remains 



v. 1306, U.S.N.M., pL 60 fig. t \ it is unmistakable. It closely resembles Plat. 



tie l. which may be considered, therefore, as representing typical to 

 Verrill'a interpretation of troschelii, n< represented by his Plate 26, is consequently 

 not correct 



Verrill'a I I L91 t. p. 102, pi 53, fig 1) is a somewhat distorted 



mien of forma I having few minor -pines it resembles PI 



- in Juan Islands, Wash hit has slightlj slenderer primary dorsal apfa 

 \o 603, Stanford collection, Insect [aland, British Columbia, i- marly identical 



with the type of 



