OPHIOPHRAGMUS WURDEMANI. 21 



with an angle inward ; length to breadth, .7 : .5. Side mouth-shields very 

 narrow, curved, of equal width, and meeting within. Under arm-plates small, 

 squarish, with rounded corners ; length to breadth, .5 : .5. Side arm-plates 

 narrow and feeble, meeting neither above nor below. Upper arm-plates 

 large, wider than long, oval, overlapping ; length to breadth, .5:1. Disk 

 covered above with not very regular imbricated scales ; five or six in the 



length of a mm. Among them, the primary plates may be distinguished by 

 their larger size ; the scaling below is much finer and more delicate ; six or 

 eight scales in the length of a mm. The margin of the disk and the outer 

 portion of each interbrachial space is closely beset with granides. Radial 

 shields wide, joined for their whole length, which to the breadth is 1.1 : .7 ; 

 each has a small, squarish radial scale just over the ami. Arm-spines three, 

 short, rounded, tapering ; of about equal lengths, .6 mm . Tentacle-scales two, 

 at right angles to each other. 



Color, in alcohol, greenish-gray. 



Dr. E. Palmer ; Cedar Keys, Florida. 



This species has very much the general habit and appearance of Hemiphoiis 

 eordifera. It perhaps stands nearest to Ophiocnida (OpJuophragmus Ljn.) Loveni, 

 but the mouth-papilla? of this last are bead-like and nearly equal ; and there 

 are many other differences. 



Ophiophragmus Wurdemani Var. ? 



A specimen by Dr. Stimpson, from Sombrero Key, 47 fathoms, had the 

 disk-scaling natter and coarser and the mouth-papilla? somewhat more bead- 

 like than in the type. It is probably a variety. 



