276 BULLETIN OF THE 



plates projecting as narrow spine-crests, and meeting neither above nor below. 

 Upper arm-plates much wider than long, transverse oval, thick and micro- 

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

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

 which are widely separated by depressed hues. Interbrachial spaces below 

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

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

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

 minute, rounded tentacle-scales. Color in alcohol, 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 fathoms. 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 

 fathoms. Station 280, Barbados, 221 fathoms. 



Hemieuryale tuberculosa sp. nov. 



Plate VIII. Figs. 123-127. 



Special Marks. — Upper arm-plate persistent to base of arm and there sur- 

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

 grow larger towards their ends. 



Description of an Indivdiual (Station 203). — Diameter of disk 6.5 mm. 

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

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

 apex appears the lowest of the short, thick 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 Latge M 

 mouth-shieldfl, and like them microscopically tuberculous. Under arm-plates 

 swollen and soldered with surrounding parte, BO that their outlines are indis- 

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

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

 At its tip however they meet broadly above, where there is a small bead-like 

 upper arm-plate. A few joints farther in, it becomes larger and has a supple- 

 mentary piece at either comer, and a granule inside it. in the centre, and sens* 

 Eating the aide arm-platee (Kg. 1-7). still farther in, the upper arm-plabei 



