RErORT ON THE OPHIUROIDEA. 



35 



even higher than wide. In profile, however, they are seen to be longer than the typical 

 form, and present sundry crests and grooves. OioMoglypha hullata heads an aberrant 

 group which in some points approaches Ophiomusimn, to wit. in the closely joined 

 radial shields ; the very long and spreading mouth frames, with a broad, regular, 

 uncovered nerve ring ; the massive and closely soldered disk plates, and the regular and 

 less club-ended genital plates. (See PL XXXVIII. figs. 10-13, 14-17, 22-25.) 



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Table of Species of OphioghjjyJia. 



Very large lyre-shaped mouth shields. Pairs of pores between basal 

 under arm plates, ...... 



Similar to the preceding, but fewer tentacle scales, and a depression 

 instead of a pair of pores between basal under arm plates, 



One depression only between 1st and 2nd under arm plates. Mouth 

 shields larger, and disk thicker than in Ophioglypha sinensis, . 



No depression between basal under arm plates. Papilla of arm 

 comb short, spaced, and tooth hke. Mouth sliields pentagonal, 

 and as broad as long, ...... 



Similar to the preceding, but papiUse of arm comb squaTi.sh and 

 crowded, and a slight lobe on outer side of under arm plate, . 



Disk scales more or less swollen. Two tentacle scales on each pore 

 beyond disk, ....... 



Similar to the preceding, but papilla of arm comb are squarish and 

 crowded, and there is no second comb on basal upper arm 

 plate, ........ 



Primary plates very large and conspicuous, and separated by small 

 scales. Under arm jjlates minute, and about as long as broad, . 



Disk thick. Outer ends of genital scales separated by a pair of plates 

 bearing papiilla3 like the ann combs, .... 



Dis. scales small, regular, and nearly of a size. Pai^iLlaj of arm comb 

 '^ort, and almost bead like, ..... 



Similar i the preceding, but arm spines shorter, disk scales more 

 swolion, and mouth papillae smaller, .... 



Ul^per disk scales with a central depression. Lower arm spine in 

 form of a hook, ...... 



Disk covered by a few large plates, whereof the primaries occupy the 

 • area inside the radial shields. Three short, stumpy, arm sjsines, 



Disk covered with smooth skin, through which the very small scales are scarcely or 

 not at all visible. Arm spines, long, broad, and flat, .... 



Disk scales thin and smooth. Under arm plates, withm disk, large and toucliing 

 each other. Arm comb of sharjj needle-like papilkr, with a well-marked under 

 comb on the arm itself, ....... 



J- Ophioglypha eiliata. 



V Ophioglypha sinensis. 



> Ophioglypha kinhergi. 



Ophioglypha alhida. 



Ophioglypha aeervata. 



\ Ophioglypha sarsii. 

 ) Ophioglypha ardica. 



\ Ophioglypha lUtkeni. 



\ Ophioglypha affinis. 



> Ophioglypha earnea. 



\ Ophioglypha rohusta. 



) Ophioglypha meridion- 

 j alls. 



V Ophioglypha falcifera. 



> Ophioglypha forhesii. 



> Ophioglypha flagellata. 



Ophioglypha paUiata. 



