64 BULLETIN OF THE 



Ophiocreas caudatus sp. nov. 



Plate XVI. Figs. 439 - 443. 



Special Marka. — A large species. . Arms to disk as 13 to 1. No tentacle- 

 scale on the first arm-joint ; then for several joints only one, small and peg- 

 like ; thereafter two, which never grow very long. Skin thick. 



Description of an Individual (Station 232). — Diameter of disk 22 mm. 

 Length of arm about 300 mm. Width of arm close to disk 5.5 mm. Height of 

 arm near base 5.5 mm. Mouth-angles covered with very thick skin giving a 

 swollen look ; on their sides and above the second mouth-tentacle is a sort of 

 pavement of irregular flattened grains. , Twelve large thick teeth, longer than 

 wide, with cutting edge shaped like a rounded angle ; the two lowest are small- 

 est and are less flattened. Arm-joints obscurely indicated by the arm-bones, 

 whose outlines are seen through the skin. Arms broader above than below ; 

 covered with a thick skin, which, when partly dry, presents under the micro- 

 scope a minutely tuberculous surface. No tentacle-scale on first arm-joint ; be- 

 yond this there is only one, short and peg-like, for some distance, sometimes 

 as far as the thirteenth joint ; after which there are two, still short, and cased 

 in very thick bags of skin ; on last third of arm the scale of the brachial side 

 has become stout, thorny-ended, and much the longer (3 mm.). Disk thick 

 and angular, covered with thick skin similar to that of the arms, and having 

 interbrachial spaces re-enteringly curved. Radial shields high and narrow, 

 diverging from the centre of disk to sides of the arms. The genital openings 

 are long, extending from upper edge of disk to mouth-ring. Color in alcohol, 

 uniform pinkish brown. 



Station 232, off Enosima, 340 fathoms, 2 specimens. 



Another somewhat smaller specimen had already two tentacle-scales on the 

 fifth joint. 



Ophiocreas abyssicola sp. nov. 



Plate XVII. Figs. 470 - 473. 



Special Marks. — Arms scarcely as high as wide, about eight times the 

 diameter of the disk. Skin quite smooth, with radial shields scarcely indicated 

 externally. Genital openings very short, and situated near the inner inter- 

 brachial angle. 



Description of an Individual (Station 241). — Diameter of disk 7 mm. 

 Length of arm about 60 mm. Width of arm close to disk 1.7 mm ; height of 

 same 1.2 mm. Four or five short, flat grains above the second mouth-tentacle, 

 on the sides of each mouth-angle. Seven stout, nearly equal teeth, shaped 

 like a blunt spear-head. On removing the skin the small, irregular, rounded 

 mouth-shield, and large, longer than broad side mouth-shields, can be seen ; 

 the latter are often broken. Under arm-plates rather large, rounded, as broad 

 as long, closely soldered, and with vague outlines. Side arm-plates small, 



