OPIIIOGLYPIIA STUWITZIL 



51 



LIST OF SPECIMENS, 



Cntalo<;iic 

 Number. 



Orijiinnl Numl>er 

 NuiulxT. of Spec. 



Locality. 



When 

 Collected. 



Whence obtained. 



Nature of 

 Specimen. 



40 

 41 



42 



43 



341 



344 



1033 



Museum of Comparative ZoiJlogj/. 



Greenland. 

 Greenhuul. 



Greenland. 

 Greenland. 

 Straits of IJellisle. 

 Straits of Bellislc. 



Sinithsoniaa Institution. 

 2 Greenland. 



Trof. Sars, 1852. 

 University Mnsenni, 



Copenlia^fen. 

 I'rof. Sars, 1852. 



A. S. Packanl, Jr! 

 Williams CoUew. 



University Musenm, 

 Copenhagen. 



Alcoholic 



Dried. 

 Alcoholic, 



Alcoholic. 



Opliioglypha Stuwitzii Lyman. 



Ophiura Stuwitzii Lutken. Oversigt over Gronlands Echinodermata, p. 51. 1857. 

 Ophiura Stuwitzii LiJTKKX. Addit. ad Hist. Oj)li., p. 49. 



Special Marks. — Arms very little longer than diameter of disk ; 

 disk thick ; scales on disk irregularly arranged. 



Description of a Specimen.* — Diameter of disk, 5""°' ; from outer 

 side of mouth-shield to outer corner of opposite mouth-slit, 2.5'"""; width 

 of arm without spines, 1.5""'; length of arm about 5.5™"". Mouth-papilla3 

 numerous ; outer ones very small, inner ones tolerably large, sharp, 

 arranged at the inner point of the jaw in a bunch. Mouth-shields much 

 longer than broad, within pointed, rounded without, lateral sides slightly 

 re-enteringly curved ; length to breadth, 1 : .4. Side mouth-shields short 

 and very narrow, meeting within, and occupying the inner angle of the 

 mouth-shields. Under arm-plates very small, swollen, narrow ; towards 

 the tip of the arm they become smaller and pentagonal. Side arm- 

 plates large, wider above than below, strongly arched, projecting out- 

 ward and sideways, so that there is a deep crease between each plate 

 and the one next beyond it. Upper arm-plates broader than long, outer 

 side curved, and longer than inner side, which is nearly straight ; lateral 

 sides straight; length to breadth (second plate), .4 : .8 ; as they go 

 towards the tip of the arm, they grow rapidly narrower, and propor- 

 tionately longer. Disk scales above, thick, swelled, close, of various 

 shapes and sizes, those towards the centre rather the largest, some 



* As the only specimien in the Smithsonian Institution was injured, a part of this description 

 has been taken from Lutken. 



