1 265 



Ambulacral spines in one regular row, linear, compressed, and blunt. 

 Ventral spines as long as the ambulacrals, capitate, with bluntly- 

 rounded heads, elegantly striated on the convex inner face and tip, 

 and with a median sulcus on the outer side. They are arranged in 

 four rows, those of the outer row being largest ; and there are some 

 minor pedicellariae on the outer sides of the spines in all of the rows. 

 The dorsal spines are not very numerous, but are for the most part 

 large, their regularly globular and beautifully striated or radiated 

 heads being about eight-hundredths of an inch in diameter, and 

 larger than those of the ventral spines. They are arranged without 

 order, standing about one-seventh of an inch apart ; but five or six 

 longitudinal rows, may be obscurely traced, the marginal row being 

 most distinct, containing eighteen or twenty spines. On the disc, 

 there is a central tubercle, but scarce any indications of a pentagon. 

 Around the bases of the dorsal spines there are regular wreaths of 

 minor pedicellariae. The major pedicellarise, which are of the short, 

 conical or sub-globular form, with broad valves, are scattered between 

 the spines as in A. ochracea. Papulae in groups. 



Color in life purple, according to Dr. dewberry. The spines are 

 probably white, or at least of a lighter color. Diameter, five and a 

 half inches. 



This very pretty species differs from A. ochracea in its larger dor- 

 sal spines, which are not arranged in a reticulating pattern ; and 

 from A. LutJcenii, in its shorter and more numerous ventral spines, 

 as well as in the presence of major pedicellarite on the back. 



Habitat, San Diego, Cal. Colorado Expedition. Dr. J. S. New- 

 berry. 



ASTERIAS LUTKEXII (nOV. Sp.) 



Rays five, rather broad, with blunt tips ; disc moderately large. 

 Proportion of the diameters, 1 : 4.25. Ambulacral pores in four reg- 

 ular rows. Ambulacral spines in one regular row, slender, long (but 

 not longer than the ventrals), not compressed, but tapering to a blunt 

 point. Ventral spines in four approximated rows, elongated, scarcely 

 capitate ; heads elongated, subtruncate, striated within, and often 

 sulcated along the middle on the outer side, where there are, always 

 semicircular clusters of minor pedicellariae. Beyond the ventral 

 spines theie are distinct lateral channels. The dorsal spines are 

 uniform in size and distance, being about one-fourth of an inch apart 

 in one specimen, and arranged without order, except in the regular 

 marginal row, which consists of about thirty spines ; and they form 

 no pentagon on the disc. They are one-eighth inch high, and half 

 that in breadth, capitate, with the heads striated and conical, with 

 pinched tips. Around the base of each there is a rather narrow ring 

 of minor pedicellarise. There are no major pedicellariae scattered 



