144 



PROCEEDINGS OF THE ACADEMY OF 



[1889. 



wards the mouth, partially granulated ; side mouth shields longer 

 than broad, inner ends not meeting within; teeth two or three, 

 conical, pointed, flattened from above downwards; mouth papillae 

 about eighteen to each mouth angle, small, closely placed, touching 

 one another, the inner ones bluntly conical and 

 becoming squarer as they pass outwards. Edge of 

 rz>.-r- the disk between the arms slightly swollen. Arms, 

 length not much greater than the diameter of the 

 disk, short, flat ; outer edges of the upper arm plates 

 convex, about twice as wide as the inner edge ; the 

 lateral edges straight ; side arm plates projecting forwards and out- 

 wards, meeting above and below only towards the tip of the arm, 

 bearing five short stout spiues, the lowest rather longer than 

 -2K the others and the base covered by the outer tentacle scale ; 

 Fig ;• sometimes near the base of the arm there are one or two 

 supplementary spines within and between the others; under arm 

 plates four-sided with the inner angles truncated, longer than broad, 



outer edge convex, wider than the inner 

 edge ; lateral edges concave ; two tentacle 

 scales, the inner one the larger of the two. 

 Diameter of the disk about 7 mm. ; length 

 of arms about 9 mm. 

 Color of single dried specimen, a very light brownish tint. 

 Ophioglypha Lockingtoni, n. sp. (Figs. 6-8.) 



Disk stout, flat ; dorsal surface with central 

 rosette of primary plates ; a similar plate in 

 each interbrachial space, and in each of the 

 interbrachial spaces of the edge of the disk ; 

 radial shields rounded pentagonal, about the 

 same size as the primary plates ; between the 

 larger plates there are smaller ones. Mouth 

 shields covering the greater part of the inter- 

 brachial spaces of the under surface of the disk, 

 ovate with the narrower end turned inwards ; 

 side mouth shields oblong ; outer pair meeting 

 along their whole length, and their outer ends resting upon the inner 

 end of the mouth shield ; the inner pair meeting along the greater part 

 of their length, and their >outer ends resting upon the inner ends of 

 the outer pair. The rest of the lower surface of the disk is covered 

 with a few smaller scales. Arms, short, strongly keeled ; upper arm 



Fig. 4. 



Fig. 5. 



Fig. 6. 



