116 



THE 0PHIURID7E. 



the definition of this genus must be somewhat altered^ as it has the 

 disk wholly covered with thin scales ; or perhaps G. cm'ulesccns should be 

 referred to Ophioglypha together with 0. inermis, and G. mollis alone remain 

 in the genus Gi/mnophmra. For the present^ we are unable to say anything 



about it definitely. 



10. Ophioglypha superba n. sp. 



Plate I. Figs. 4-8. Plate VII. Fig. 4. 



Diameter of disk, 25 mm. ; width of arm close to disk, 5.6 mm.; length 

 of arms, c. 100 mm. Three or four short mouth papilla) on each side, close 

 set, rounded; that on the apex of jaw mostly concealed by the innermost 

 papillae on the sides. Mouth angles rather long. Mouth shield very prom- 

 inent, thick. Inner end narrow^ with an angle ; outer end broad, rounded, 

 bending towards the dorsal side ; a little longer than broad. Side mouth 

 shields short, rather broad, meeting within. 



Ventral plates in close contact in their whole breadth on the first c. 10 

 joints, separated only from the c. 15th joint; their form is almost regular 

 hexagonal, with inner and outer side longest. Farther out on the arm 

 they have an angle within and outer edge curved. They are broader 

 than long. The inner ones are somewhat hollowed, almost saddle-shaped, 

 the outer ones flat. Side arm-plates short, rounded, meeting below from 

 about the 15th joint, separated above almost to the end of ^e arm. 

 Dorsal plates almost of the same shape as the ventral, on the inner part ot 

 the arm, farther out more elongated ; they are broadly in contact. The 

 first 4-5 thick and swollen ; in the rather deep incisure of the disk there 

 are seen one or two rudimentary dorsal plates. The arms are very thick 



and high. 



The disk is covered with large, thick, swollen polygonal plates, among 

 which the primary plates are not conspicuous. The radial shields rather 

 large, with a notch on their outer end; they are in contact in most of their 

 length, only their inner part being separated by an elongated plate. No 

 great marginal plate in the interbrachial spaces. Under side of the disk 

 bending towards the dorsal side, the edge of the disk being very high and 

 abrupt (Pig. 6), covered by several thick plates and by the large genital 

 plates, which, especially at the upper side of the arm, form a pair of con- 

 spicuous plates outside the radial shields, bearing the well developed arm- 







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