90 BULLETIN OF THE 
figure. The first arm-pores have three minute papille on either side ; those 
beyond have only two long and rounded scales on the inner side of each pore. 
Color in alcohol, white. 
It will be noted that O, inermis stands on the limit of Ophioglypha ; while it 
has the general look and structure of the genus, it lacks wholly the arm-comb, 
and has only a trace of the papille along the genital scale below. It seems to 
go better here than with Ophiocten. 
»T wo specimens, (also two young, this species?) off Tristan d’Acunha, 500 
fathoms. 
Ophioglypha Deshayesi sp. nov. 
Plate II. Figs. 35-37, 
Special Marks. — Side mouth-shields large and ovoid. Radial shields and 
primary plates circular and similar. Disk and arm plates thick, swollen, and 
closely soldered. Mouth-papille and scales of mouth-tentacles thick, squarish, 
irregular, and crowded. 
Description of an Individual (Station 51). — Diameter of disk 18 mm. 
Length of arm 80 mm. Width of arm close to disk 4 mm. Mouth-papille 
irregular, crowded, angular, closely soldered, five or six on each side and usu- 
ally one or two at apex of jaw. Mouth-shields small, with long, acute angle 
inward, and outer edge cleanly curved ; length to breadth 3 : 2. Side mouth- 
Shields large, narrow pear-seed shape, with the rounded ends inward, where 
they meet at one point. Inside the junction of the side mouth-shields is ۵ 
small diamond-shaped supplementary plate, which makes the apex of an angle. 
First under arm-plate semicircular or transverse oval, with outer edge nearly 
straight ; the plates beyond are wide triangular, with a truncated angle in- 
ward, and outer side a little curved. Side arm-plates swollen, nearly meeting 
below within the disk ; separated above by the upper arm-plates, which are 
broader than long, arched, wider without than within, hexagonal, having outer 
angles more or less rounded. Disk very thick, covered with rounded plates 
somewhat obscured by a thick skin; in the centre above are six large primary 
plates separated by one or two rows of smaller ones, and in the interbrachial 
spaces are two larger plates, one marginal and the other inside it. Radial 
shields very nearly round, separated usually by three plates in a line ; length 
to breadth 3 : 3 ; along their inner margin is a row of small irregular-shaped 
scales, Genital plates formed of two or more pieces, wider without, tapering 
inward ; along the outer portion of their free edge is a row of small shapeless 
pieces, which become more numerous above, and there form a sort of arm- 
comb, One minute papilla-like arm-spine situated near the junction with 
the upper arm-plate. Pores of mouth-tentacles enclosed on one side by the 
two outer mouth-papillo, with some other minute pieces; and on the other 
side by four or five similar parts, which correspond to tent:cle-scales : the 
rest of the pores stand near the lateral corners of the under arm-plates, and 
have three small peg-like tentacle-scales, Color in alcohol, yellowish-brown 
or gray. 
