OPIIIOGLYPIIA NODOSA. 



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Ophioglypha albida Lyman. 



Ophiura texlurata, 2 rndem minor nl/iida (V) Lamk. I list. Aiiiui. s. Vert., 11. p. 542. 1810. 

 Ophiura albida FouuKs. Wi-ni. Trans., VIII. p. 12.j. 

 Ophiura alhida Forbks. Brit. Starfishes, p. 27. 

 Ophiura alhida LrTKKX. Aildit. ad Hist. Opli., p. .3!). 



LIST OF SPECIMENS. 



Ophioglypha nodosa Lyman. 



Ophiura nodosa Lutkkx. Vidensk. Meddelelser. Nov., 1854. 

 Ophiura nodosa Lutkex. Addit. ad Hist. Opli., p. 48. 



Special Jiarlcs. — Primary plates irregular in form, but regularly 

 arranged ; disk tliiek ; arms often twice the diameter of the disk ; arm- 

 spines one, two, or three, separated from the tentacle-scales. 



Description of ci Specimen. — Diameter of disk, 7""" ; from outer 

 side of mouth-shield to outer corner of opposite mouth-slit, 4.3""" ; width 

 of arm without spines, 2°'° ; length of arm, O.-j""'" ; distance from outer 

 side of mouth-shield to inner points of mouth-papilla^, to that between 

 outer corners of mouth-slits, 2.9 : 1.5. Mouth-papilla', ten to each angle 

 of mouth ; short, Hat, stout, blunt, set close together, those within nar- 

 rower than the outer ones. Teeth four, remarkably short, resembling 

 mouth-papilla?, flat, stout, with a curved cutting edge. Mouth-shields 

 broader than long, cleanly rounded without, and more or less tapering 

 inwards ; length to breadth, l.G : 1.2. Side mouth-.'^hields very narrow, 

 occup^ang only the inner end of mouth-shields ; Avhere they meet 

 within, they make an angle, and run still farther inwards, side by side. 

 Under arin-])lates rapidly lessening in size towards the tip of the arm ; 

 narrow, swollen, rounded without, tapering inwards ; first plate largest 

 of all, triangular, with one angle inward, stout, somewhat swollen ; 

 length to breadth, .9 : .9 ; second plate rather smaller. s([uarish, with 

 rounded corners ; beyond this the plates grow more and more rounded 



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