lIEMirUULIS. 



137 



Ophiocnida neapolitana Lyman. 



Ampldura neapolitana Saks. Nyt Magazin ior Naturvidonskaberne, X. p. 35. 1857. 

 LIST OF STECIMENS. 



Oataloftue Original Number 

 Number. Number, of Spec. 



Locality. 



When 

 Collected. 



Wheoce obtaiaed. 



Nature of 

 Specimeu. 



Museum of Comparative Zoology. 



416 



Aliier. 



Jardin des Plantcs. I Alcoholic. 



HEMPHOLIS Agass. MS. 



Disk, above, covered Avith rounded, rather thick scales, and with large 

 radial shields ; below, naked. At the base of each arm, disk slightly 

 indented. Teeth. No tooth-papillre. Two mouth-papilla to each angle 

 of the mouth. Side mouth-shields touching each other, so as to form a 

 continuous ring round the mouth. Three short, tapering arm-spines. 

 Two genital slits, beginning outside the mouth-shields. 



Hemipholis cordifera Lyman. (P1. i. Figs. 1-3.) 



Asteriaa cordifera Bosc. Hist. Nat. des Vers, IT. p. 113 (1802), II. p. 138 (1830). 



Ophiiira elongata Say. Journ. Phil. Acad., V. p. 14G. 1825. 



Opiiiolepis elongafa Stimpson. Proceed. Boston Soc. Nat. Hist., IV. p. 225. 



Op/iinlepLs uncinata Ayijks. Proceed. Boston Soc. Nat. Hist., IV. p. 250. 



Hemipholis elonf/ata AciAss. MS. 



Amphiura elonrjnta Lutkkx. Addit. ad Hist. 0])h., p. 115. 



Ampldura cordifera Ly.max. Proceed. Boston Soc. Nat. Hist., VII. p. 258. 



Special Marks. — Arms eight or nine times as long as diameter of 

 disk. One tentacle-scale. Three or four papilla) at base of arms ; and 

 a row of fleshy papilla) along genital slits. 



Descrif)tion of a Specimen. — Diameter of disk, S.S"""' ; from outer 

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



18 



