﻿OPHIOCEEAMIS* L™an. 



Ophiolepis Mull. & Trosch., pars. 



Disk covered with radial shields and stout scales, none of which are 

 surrounded by a belt of small ones. Over the base of each arm, a small 

 notch in the disk. Genital scales concealed. Teeth. Tooth-papillae. 

 Mouth-papillae. Side mouth-shields small, and not meeting within. 

 Arm-spines arranged along the outer edge of the side arm-plates. No 

 supplementary pieces to the upper arm-plates. Two genital slits, begin- 

 ning outside the mouth-shields. 



Ophioceramis Januarii Lyman. 



Ophioleplt Januarii Lutken. Vidensk. Meddelelser. Jan., 1856. 

 Ophiolepis Januarii Lutken. Addit. ad Hist. Oph., p. 108. 



Special Marks. — Arms four and a half or five times the diameter of 

 the disk, which grows as large as 19°""-. Three (sometimes four) arm- 

 spines, the middle one longest; all of them stout, tapering, and flat- 

 tened. 



Description of a Specimen. — Diameter of disk, 19""-; from outer side 

 of mouth-shield to outer corner of opposite mouth-slit, V.S""; width of arm 

 Avithout spines, 4.5"""- ; length of arm, about 82'°"- ; distance from outer 

 side of mouth-shield to inner points of mouth-papiU*, to that between 

 outer corners of mouth-slits, 2.8 : 3.6. Mouth-papilliB four on each side, 

 small, rounded, flattened, and close set ; outermost one sharp, and over- 



'0<^is, snake ; Kcpafjiis, tile. 



