96 OPHIOPHOLIS. 



OPHIOPHOLIS MiJLL. & Trosch. 



Type of the Gexus, 0. bellis. 



Disk more or less covered with grains, or little spines. Teeth. No 

 tooth-papiIla3. Mouth-papilla) on the sides of the mouth-frames. Arm- 

 spines short, flat, stout, arranged along the sides of the side arm-plates. 

 Upper arm-plates surrounded by a rim of supplementary pieces. The 

 lower spine of the outer arm-joints bearing hooks. General structure 

 rather coarse and stout. Two genital slits beginning outside the 

 mouth-shields. 



species herein described. 



Primary plates naked in bracliial and interbrachial spaces, 0. belUs. 



Primary plates naked in brachial spaces only, 0. Kennerlyi. 



No naked primary plates, 0. Caryi. 



Ophiopholis bellis Lyman. (Plate I. Fig. 4-6.) 



Stella scolopexdroides ; hellh scolopendrica Linck. De Stcl. Mar., p. 52, PI. XL. fig. 71. 1 733. 



As;eriw< aculcnki O. F. :\Iull. Zool. Dan., p. 29, PI. XCIX. 1789. 



Ophiura bellis Joiixs. Mag. Nat. Hist., p. 595. 1835. 



Ophiocnmn bellis Forbes. British Starfishes, p. 53. 



Ophiulepis scolopendrica Mull. & Trosch. Syst. Asteriden, p. 96. 



Ophiopholis aculeata Lijtkex. Addit. ad Hist. Oph., p. 60. 



Special Marks. — In alcohol, the prevailing tint is bro^^'nish-red. 

 Primary plates in the brachial and interbrachial spaces. Disk grains 

 of adult specimens elongated, like short spines. 



Descri2)tion of a Siyecimen. — Diameter of disk, 20.5™""- ; from outer 

 side of mouth-shield to outer corner of opposite mouth-slit, 7""° ; 

 width of arm without spines, 3""°' ; length of arm, 142""°- ; distance 

 from outer side of mouth-shield to inner points of teeth, to that 

 between outer corners of mouth-slits, 3.1 : 3.6. Mouth-papilla? thin, 

 flat, scale-like, squarish, wdtli rounded corners ; six to each angle of 

 the mouth. Teeth twelve, squarish, short, middle of the cutting edge 

 thickened ; upper ones growing narrower ; two or three lowest ones 

 often split in two. Mouth-shields nearly oval, with a slight point 

 within ; length to breadth, 1.5 : 2. Side mouth-shields stout, closely 

 soldered with surrounding parts, meeting within. Under arm-plates 

 somewhat irregular, broader than long, a little separated ; inner side 



