336 MB. E. A. SMITH OS A NEW EOKM OP OPHIUEID^. 



diictis ; scuta superiora hexagonalia, frequenter hie illic fracta, 

 latiora quam longiora, ad latera acute angulata ; scuta lateralia nee 

 supra nee infra tangentia, extra valde prominentia; spinse brachiales 

 2-3, duse inferiores subaequales, longitudinem scuti inferioris paulo 

 superantes, supremse maximae, crassse, apice saepe lobatse, aliquanto 

 scabrse, latitudinem brachii longitudine circiter sequantes, inter- 

 A^allis[irregularibiis positse; color ubique lacteus. Diam. disci 16 

 mill,, brachii 3. 



Disk subpentagonal, sinuated in the middle of the margins 

 between the rays, covered above and beneath with a soft minutely 

 scaled skin, which is produced a little way up the arms ; the scales 

 along the lateral margins between the radial shields overlap one 

 another and are much larger than those on the rest of the disk ; 

 on the upper and under surface are a number of small slender 

 mobile spines widely and irregularly distributed. The radial shields 

 are small, wedge-shaped, and very far apart, being separated by a 

 space as wide as the arms ; arms five, very long, flat beneath, and 

 arched above and gradually tapering, eight or nine times as 

 long as the diameter of the disk ; oral shields longer than broad, 

 oval, faintly pointed within ; lateral mouth-shields triangular, 

 with concave sides, embracing the sides of the oral shields and 

 just meeting at their base ; mouth-papillae stout, four on each side 

 of every angle, the outermost by far the largest, triangular and 

 contiguous to the side mouth-shields and appearing like a supple- 

 mentary lateral oral shield ; the other three are in rotation 

 smaller ; tooth-papillae in three rows, stout and like the inner 

 mouth-papillae ; teeth — ?; tentacle-scale none ; lower arm-plates 

 about as long as broad, heptagonal, the two aboral margins sloping 

 to a roundish angle, the two sides are rectilinear, the two inner 

 lateral margins bounded by the side arm-plates, and the oral side 

 concave, through the overlapping of the roundish angle or point 

 of the preceding shield ; upper arm-plates normally hexagonal, 

 but frequently broken irregularly in one or more places, broader 

 than long, the outer and inner sides equal and almost straight, the 

 side margins almost equal and forming an acute angle between 

 the lateral arm-plates. 



The side arm-plates do not meet above or beneath, and are very 

 prominent on the side remotest from the disk. The number of 

 arm-spines is not constant on all the plates, some bearing two and 

 others three. The two lower ones are subequal, not very acumi- 



