122 BULLETIN 76, UNITED STATES NATIONAL MUSEUM 



( rossed pedicellariae (pi. 46, figs. 3, Za-3d) with the usual distribution. They 

 are attached to plates at base of dorsal spinelets but are not sufficiently numerous 

 to form wreaths as in L. hexactis. Interrupted wreaths are present on superomarginal 

 spinelets and small tufts on outer side of inferomarginals, actinals, and adambulacrals. 

 The abactinal pedicellariae measure 0.19 to 0.22 mm. in length and are characterized 

 by the increased size of the external lateral teeth of the terminal lip of the jaw as 

 shown in Plate 46, Figure 3. Sometimes only one tooth is enlarged, sometimes 

 several. The adambulacral pedicellariae have a somewhat longer lip and are slightly 

 larger than the abactinal (0.24 mm.). 



Small straight pedicellariae (pi. 47, figs. 3, 3c-3d) are found chiefly on mouth 

 and proximal adambulacral spines, very sparsely in interradial, intermarginal, and 

 actinal channels and just above the superomarginal plates; small pedunculate ones 

 (0.2 to 0.4 mm.) are scattered along furrow edge of adambulacrals. They are fairly 

 broadly triangular in contour, compressed, and the tips of the jaws may be somewhat 

 unguiculate. They are usually very scarce outside of the ambulacral and oral plates 

 and are never conspicuous. The largest (interradial) are about 0.5 mm. in full- 

 grown males. 



Madreporic body conspicuous, surrounded by a close palisade of spinelets; 

 external margin at middle of r: striae fine, branching, or interrupted. 



Color in life. — Large specimens are usually olive green, either uniformly dark, or 

 dark mottled with paler green; actinal surface whitish, ashy, or pale pinkish gray; 

 tube feet very pale translucent gray green. Small specimens may be dull rose pink 

 or mallow purple blotched with pomegranate purple, whitish on under side; others 

 are gray green mottled with darker olive. A medium-sized specimen of forma 

 aequalis: General color of abactinal surface rich greenish brown rather faintly marbled 

 with dark raw Siena and pale Hooker's green. The ends of fluted spinelets pale 

 greenish yellow; pedicellariae same; papulae pale greenish to bottle green, golden at 

 ends; madreporic body cream color; marginal spines Naples yellow becoming more 

 and more greenish toward end of ray; tube feet Naples yellow. 



Specimens collected under rocks at Port Renfrew, Vancouver Island, by Dr. 

 John C. Brown: "Color variable, often gray browns; some are orange with gray- 

 brown specks and blotches all over; some are light coral pink (like coralline algae)and 

 still others are bright coral red." 



Anatomical notes. — Skeleton (pi. 46, fig. 3e): In most specimens the skeleton ol 

 the ray consists of regular longiseries of conventionally 4-lobed or somewhat lozenge- 

 shaped plates with the exception of the dorsolateral area where the regularity is 

 broken. There are essentially two dorsolateral series; that adjacent to the carinals 

 rather zigzag and separated from the second or outer by a fairly regular longiseries 

 of papular pores. The dorsolaterals aro quite regular in contour. In a few specimens 

 examined the serial arrangement of abactinal plates was entirely broken up on the 

 proximal half of ray. The superomarginal plates are much the broadest of any. 

 The interbrachial septum consists of strong imbricating plates. 



