MUSEUM OF COMPARATIVE ZOOLOGY. 91 



shields longer than broad ; wider without than within, where they present a 

 rounded angle ; outer comers also rounded ; on the lateral sides a constriction 

 which gives them a three-loljed aspect ; length to breadth 2.5 : 2.3. Side 

 mouth-shields small, long, very narrow ; outer end slightly broader than the 

 inner, where they meet. First under arm-plate triangular, with truncated 

 angle inward and outer edge curved ; the next four are four-sided, with curved 

 outer edge ; beyond the disk they are pentagonal, with an obtuse angle inward, 

 short lateral sides, and a long curved outer side. Side arm-plates thick, deeply 

 constricted at theii' inner end ; not meeting below till some distance beyond the 

 disk, separated above by ujjper arm-plates, which are broader than long, wider 

 without than within, the outer edge being curved. Disk thick, c^ered with 

 large, closely soldered plates and scales. Radial shields pear-seed shape, longer 

 than wide, with an angle within and outer edges rounded ; touching without, 

 separated within by a single wedge-like plate ; in the centre above is a close 

 rosette, consisting of a pentagonal primary plate, surrounded by five others, 

 smaller and of an irregular shape ; the remaining interbrachial space on the 

 upper surface is occupied by rows of semicircular plates. Lower interbrachial 

 space, covered by small curved, overlapping plates. Genital scales very nar- 

 row, except without, where they broaden into a wide radial scale, bearing a 

 comb of short spines, which continue below as minute papillae on the margin 

 of the genital opening. Ten or twelve fine, short, blunt arm-spines, extending 

 in a close continuous row along outer edge of side arm-plate. Tentacle- 

 scales short, square, large, and thin. The pores of the mouth-tentacles carry 

 five or six on each side ; the pores immediately beyond are very large, and 

 have about four on each side ; beyond the disk they have three or four on the 

 inner side, and one spiniform on the under arm-plate. Color in alcohol, light 

 gray. 



Station 235, 565 fathoms, 1 specimen. 



Ophioglypha solida sp. nov. 



Plate V. Figs. 120-123. 



Special Marks. — Basal under arm-plates, beyond the second, about as long 

 as broad, squarish, and with water-pores between them. Arms high, with 

 swollen upper arm-plates and very small spines. Upper disk covered in 

 great part by a rosette of primary plates and by radial shields. 



Description of an Individual (Station 192). — Diameter of disk 10.5 mm. 

 Width of arm close to disk, without spines, 3 mm. Eight minute, widely 

 separated, pointed mouth-papilla; on each side of angle, with a cluster of three 

 bluntly pointed at apex of jau'. Mouth-shields narrow, pear-seed shaped, with 

 sharp angle inward, and outer edge much rounded ; length to breadth 2 : 1.5. 

 Side mouth-shields longer than broad, much wider without than within, where 

 they meet, extending nearly two thirds of the distance on sides of mouth- 

 shield. First under arm-plate three-sided, longer than wide, with rounded 

 angle inward, and a slight re-entering curve on all three sides ; the next six or 



