27 U BULLETIN OF Tlli' 



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

 Upper arni-])]at(;s niucli wider than long, transverse oval, thick and micro- 

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

 covered above by higli, lumpy, irregular, microscojiically tuberculous plates, 

 which are widely sei)aratL'd by depressed lines. Interbrachial spaces below 

 covered liy lumpy scales. Kadial 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, equal arm-spines, about as long as a joint. Two 

 minute, rounded tentacle-scales. Color in tdcohol, 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 Lym. 



Station 100, off Morro Light, 250-400 f\ithoms. Station 208, ]\Iartinicpie, 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 209, St. Vincent, 124 

 fathoms. Station 280, Barbados, 221 fathoms. 



Hemieuryale tuberculosa sp. nov. 



Plate Vm. Figs. 123-137. 



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 laiger 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 papillai 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 

 breadtli, 1:1. Side moutli-shields ovoid and swollen, nearly as large as 

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

 swullen and soldered with surrounding parts, so 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 tij) however they meet broadly above, where there is a small bead-like 

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

 mentary ]Meic ;it eilhei' cornel', and a grannie inside it, in the centre, and sepa- 

 ratiiiLj the siile arni-])lates (Fig. 127). Still farther in, the upper arm-plates 



