■:>r 



THE OrillURID^. 



159 



I 



a little longer than wide, with a rounded peak within, outer part restricted ; 

 the sides much diverging on the inner, almost parallel on the middlle part j 



ded. Side mouth shields a little broader without than within, 



corners roun 



where they meet. 



First ventral plate very small, triangular, with outer edge curved. 

 Those beyond with an acute angle within, which is inconsiderably truncated 

 on the inner joints, Avhere the plates are in contact; the outer edge is 

 curved, inner and outer laterals almost straight, outer corners rounded; 

 they are almost equally broad and long. Side arm-plates with spine-ridge 

 not very prominent, a little naked space separating those of each two 

 adjoining joints, not distinctly seen from the dorsal side. Dorsal plates 

 transversely oval, more or less distinctly separated by the side arm-plates; 



less than twice as broad as long. 



Three equal tapering arm-spines, about as long as an arm-joint. 



small rounded tentacle scales. 



Presumably the under side of the disk is naked. 



Two 



) 



39, Ampliiura papillata n. sp 



Plate XIV. Figs. 4-6. 



Diameter of disk, 9 mm. ; width of arms close to disk, without spines, 

 2 mm. ; length of arms unknown. Five mouth papilloe on each side, besides 

 those on the apex, all more or less pointed, conical, the outermost but one 

 by far the largest ; the rest almost equally large, those on the apex smaller 

 than the others and placed a little higher up in the mouth. At their basis 

 there are one or two (at the one mouth angle none) very small papilla). 

 Mouth shield inconsiderably more wide than long, with an almost right angle 

 within, outer part restricted ; inner sides straight or feebly curved, corners 

 rounded. Side mouth shields rather long and unusually narrow in their 



whole length. 



First ventral plate very small, triangular, with an acute angle within 



and outer edge curved. Those beyond somewhat wider than long, rather 

 broadly in contact, their inner angle thus being truncated. Outer edge 

 curved, inner and outer laterals re-enteringly curved ; outer corners some- 

 what produced. Side arm-plates with spine-ridge little prominent; no 



naked space separating them 



Dorsal plates broadly in contact, about 



twice as broad as long ; inner side concave, outer side convex, twice as 



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