PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 203 



side 1\Y side on each plate ; one, somewhat stouter, farther out, alternat- 

 ing with them ; outside of these are usually two, obliquely placed, di 

 vergent and usually pointing toward the end of the rays; jaw-plates 

 bearing somewhat larger acute sj)ines. 



Color, in life, orange-red, mottled with brighter red on the dorsal 

 side ; beneath, light yellow. 



Two characteristic specimens of this species have b'een dredged by 

 the U. S. Fish Commission, off Cape Cod, in 80 fathoms, mud, 15 miles 

 K. 050 E. from Eace Point ; the other in 1 30 fathoms, mud, 2G miles E. 

 by ]Sr. from Eace Point Light. Another specimen was taken by Capt. 

 Thomas Goodwin and crew, of the schooner "Howard," in 170 fathoms, 

 Is", lat. 450 25', W. long. 57° 10'. 



This species differs so much from typical Porania that it might well 

 form a new generic type. It has not the smooth, naked skin of typical 

 Porania. 



Archaster tenuispinus Duben and Koreu. 



Several specimens of this species have been recently i)resented to the 

 U. S. Fish Commission by the Gloucester halibut fishermen, from deep 

 water, off the Nova Scotia coast. It is a new addition to the American 

 fauna. They vary in size from about 35'""' in diameter up to 250""". 



The largest specimen was presented by Capt. Daniel McKinnon and 

 crew, of the schooner " Mary F. Chisholm." It was from 130 to 160 fath- 

 oms, N. lat. 45<^ 02', W. long. 56° 11^'. Two smaller ones, one from 128 

 fathoms, N. lat. 40° 28', W. long. 55° 25', February, 1879, the other from 

 250 fathoms, N. lat. 42° 40', W. long. 63° 06', were presented by Capt, 

 Daniel McEachern and crew, of the schooner " Guy Cunningham." With 

 the latter were fine specimens of the rare simple-armed Ophiuran, Afs- 

 trochele Lymani V., much larger than the original type. 



Astrophyton Lamarckii Miiller aud Troschel. 



Numerous specimens of this species have been obtained in deep water 

 off George's Bank and off' the Nova Scotia coast by the Gloucester fisher- 

 men, and presented to the U. S. Fish Commission. They are found 

 clinging to Paragoryia arborea, Primnoa reseda^ Alcyonium carneuia, and 

 other Alcyouaria. 



Easily distinguished from A. Agassizii and A. eucnemis, both of which 

 also occur in the same region, by the granulation of the disk, which is 

 entirely covered, both over the ribs and iuterradial spaces, by coarse 

 granules. 



Ophiacantha millespina, sy). nov. 



A five-rayed species, allied to 0. hidentatn IJung. (= 0. spinulosa M. 

 & Tr.), but distinguished readily by the very numerous and minute three- 

 pronged and four-pronged, slender spines which thickly cover the disk. 

 The mouth-i)]ates are four-lobed or somewhat cross-shaped, the outer 

 lobe narrow and long, exteu<liug into the interbrachial spaces; the inner 

 lobe is nearly triangular; the side-lobes are nearly as long as the outer 



