318 A. E. Verrill — North American Ophiuroidea. 



Alupliiocuida, gen. nov. = Op/izocmda {j^ars) Lym. 



Disk-scales bear small acute spinules. Apical oral papilla small. 

 Distal oral papilla (oral tentacle-scale) acute, spiniform. Middle of 

 jaw-margin naked. Arm-spines five to ten. Typical species have 

 no tentacle-scale. 



A. Pntnami (Lym.). Arm-spines nine to ten, stout, upper one 

 clavate. Radial shields separate. No tentacle-scale. Hong Kong. 



A. pilosa (Lym.). Arm-spines five to six, slender, tapered. 

 Adoral shields trilobed. Radial shields, little separate. No tentacle- 

 scale. Bass Straits. 



A. alboviridis (Brock). Arm-spines five to six. No tentacle- 

 scales. E. Indies. 



A. hrachiata (Mont.). Arm-spines seven to ten, flattened, one 

 with an apical cross-piece. Europe. 



Amphilimna Verrill. Type, A. oUvaeea. 



Amphilimna Verrill, Ophiur. Bahama Exp., v, p. 30, 1899. 



Oral papillae four or five in a series. Tooth papillae two to four. 

 Arm-spines six to ten, of moderate length. Tentacle-scales usually 

 two, spiniform, one each side of the tentacle-pore. Disk swollen 

 dorsally, with a notch over the base of each arm, and covered with 

 siDinules. Radial shields parallel, largely in contact. This genus 

 includes, besides the type, only A. Garibea Ljung. 



Amphilimna olivacea Ver. 



Ophiocnida olivacea Lyman, Bull. Mus. Comp. Zool. , i, 10, p. 340, 1869 ; 111. 



Cat. Mus. Comp. Zool., vi, pi. i, figs. 7, 8; Bull. Mus. Comp. Zool., v, 9, p. 



237; op. cit., x, p. 253. Verrill, Amer. Jour. Sci., vol. xxiii, p. 219; Ann. 



Eep. U. S. Fisli Com., vol. x, p. 661 ; op. cit., vol. xi, p. 549. Lyman, 



Eeport Voy. Challenger, Zool., Ophiuroidea, v, p. 156, 1882. 

 Amphilimna olivacea Ver., Oj)hiur. Bahama Exped. , v, p. 30, 1899. 



Plate XLII, Figures 1, la. 



Arm-spines nine or ten ; oral papillae four or five. 



Taken by the U. S. Fish Commission at numerous stations off the 

 east coast of the United States, from off Mai'tha's Vineyard to Cape 

 Hatteras, in 63 to 192 fathoms, and by the "Blake " from off Rhode 

 Island to the West Indies, in 40 to 126 fathoms. Off Key West, 

 Florida, 75 to 80 fath. (Bahama Exp.). 



