OPIIIOPIIKAGMUS. 



131 



Tliis s])ccics is (li8tin(»:iiished from A. fjemhiata by the shape of the 

 niouth-shiekls and of the upper and lower arm-plates, and in having the 

 mouth-papilla> of the same size ; from A. chilensls, by having two 

 tentacle-scales instead of one. 



No. 10G3 is from Piiget Sound, and ma}^ be another species. The 

 spines are blunter, the under scales of the disk larger and less crowded, 

 and the under arm-plates rather more rounded. More specimens will 

 settle the question. 



LIST OF SPECIMENS. 



Catalrjfue OriRinal Number 

 NumJtT. Number, of Spec. 



Locality. 



When 

 Collected. 



Whence obtained. 



Nature of 

 •31>eciinea. 



379 

 229 

 230 

 351 



1063 

 1054 



Museum of Comparative Zoology. 



California. 

 Mendocino, Cal. 

 Monterey, Cal. 

 Gulf of Georiria. 



Smithsonian Institution. 



1 I Puget Sound. 

 3 I Monterey, Cal. 



Alex Agassiz. 

 ^Ir. Sayla. 

 Alex. Airassiz. 



Dr. Kennerlv. 

 Mr. Sayla. 



Alcoholic. 



Alcoholic. 



OPHIOPHRAGMUS* Lyman. 



Disk small and delicate, furnished with uncovered radial shields, and 

 covered with naked scales ; the scales along the edge of the disk are 

 turned up, so as to make a little fence. Teeth. No tooth-papilhw Six 

 mouth-papillae to each angle of the mouth. Arms slender, even, more 

 or less flattened. Arm-spines short and regular, arranged along the 

 sides of the side arm-plates. 



0^(f, snake ; (f)payfi6s, hedge. 



