270 BULLETIN dF THE 



plate^^ l)rojectiiig as narrow spine-crests, and meeting neither above nor below. 

 Upper arni-])]at(!S much wider than long, transverse oval, thick and micro- 

 scopically tuberculated ; length to breadth, .5 : .9. Disk rather thick and 

 covered alcove by high, lumpy, irregular, microscopically tuberculous plates, 

 Avhich are widely separated by depressed lines. Interbracliial spaces below 

 covered by lumpy scales. Radial shields pear-secd-shape, small, and separated 

 by a single row of plates ; length to breadth, 1 : .5. Seven or eight (sometimes 

 only six) short, stout, conical, eijual arm-spines, about as long as a joint. Two 

 minute, rounded tentacle-scales. Color in ixlcohol, nearly white ; tentacles 

 brownish. 



Station 147, St. Kitts, 250 fathoms, 1 specimen. 



At first sight this species seems like a new genus, owing to its peculiar disk 

 covering; but I do not doubt it belongs under Ophiochondrus, although I have 

 had no chance to examine the arm-bones. 



Ophiochondrus convolutus Ltm. 



Station 100, off Morro Light, 250-400 fathoms. Station 208, Martinique, 213 

 fathoms. Station 219, St. Lucia, 151 fathoms. Station 224, St. Vincent, 114 

 fathoms. Station 232, St. Vincent, 88 fothoms. Station 233, St. Vincent, 

 174 fathoms. Station 238, Grenadines, 127 fathoms. Station 253, Grenada, 

 92 fathoms. Station 254, Grenada, 164 fathoms. Station 269, St. Vincent, 124 

 fathonis. Station 280, Barbados, 221 fathoms. 



Hemieuryale tuberculosa sp. nov. 



Plate VIII. Figs. 123-127. 



Special Marks. — Upper arm-i)late persistent to base of arm and there sur- 

 rounded by large grains or tubercles. Two short flattened arm-spines which 

 LTow larger towards their ends. 



Descrijition of nn Indivduud (Station 203). — Diameter of disk 6.5 mm. 

 Lengtli of arm 37 mm. Width of arm near disk 2 mm. Three or four small, 

 close-set, bead-like papilla) on each side of a mouth-angle, and just above its 

 apex appears the Imvest of tlie shoit, tliick rounded teeth. Mouth-shields 

 small and five-sided, with rounded corners and an angle inward; length to 

 breadth, 1 : 1. Side mouth-shields ovoid and swollen, nearly as large as 

 iriouth-shields, and like tlieni microscopically tuberculous. Under arm-plates 

 swdlli'ii and sdldrred with surrdunding parts, so that their outlines are indis- 

 tinct; small, rounded, and separated from one another. Side plates a little 

 swollen, meeting below, l)ut rising only about half-way up the side of the arm. 

 At its ti]) liowever they meet broadly aliove, where there is a small bead-like 

 upju'V arni-]]late. A few joints farther in, it l>econies larger and has a supple- 

 mentary ])ie(e at either cdnier, and a granule insiih' it, in the centre, and sepa- 

 rating the side ann-]jla1es (Fig. 1'_'7). Still fuitlier in, the upper arm-plates 



