OPHIUROIDEA 209 



Azores, Canaries, Cape Verde, 1900-3200 m., " Princesse Alice ", 

 " Talisman ") ; A. grandisquama Lyman (syn. A. longispina 

 Koehler) (Bay of Biscay, Azores, to Cape Verde, ca. 400-1635 m. ; 

 also known from off Florida and the W. Indies, 225-470 m.) ; A. 

 Griegi Mrtsn. (Hardanger Fjord, Trondhjem Fjord, ca. 60-300 m.) ; 

 A. iris Lyman (off Portugal to S. of the Canaries, 307-885 m., 

 " Talisman " ; also known from the Pacific, S. of Japan, " Chal- 

 lenger ", and the Malay Archipelago, " Siboga ") ; A. josephince 

 Ljungman (Josephina Bank, 288 m., " Josefina ") ; A. Otteri 

 Ljungman (off Portugal, 990 m., "Josefina"; Azores, 1620 m. ; 

 also known from the W. Indies, and off Cape Cod, ca. 210-1425 m.) ; 

 A. Palmeri Lyman (42° 42' N., 11° 56' W., 521 m., " Talisman " ; 

 also known from the W. Indies, 180-470 m.); A. Richardi Koehler 

 (Azores, off Portugal, 1165-1494 m., " Talisman ", " Princesse 

 Alice ") ; A. Sarsi Ljungman (Azores, Josephina Bank, ca. 200- 

 540 m., " Josefina "). The main characters of these species are 

 given in the key.^ It has also been deemed advisable to include 

 in the key A. mediterranea Lyman ; although as yet not known 

 to occur outside the Mediterranean, it may well be expected to 

 occur along the Atlantic coasts some distance both to the north 

 and the south of the Gibraltar Strait ; it is known only from the 

 littoral region. 



Key to the species of Amphiura known from or likely 

 to exist in the British seas. 



1. Two tentacle scales ....... 2 



One tentacle scale . ....... 8 



No tentacle scales . . . . . . . .10 



2. Under side of disk wholly covered with scales ... 3 

 Under side of disk partly or wholly naked ... 7 



3. Outer mouth papilla broad, more or less leaf-shaped, not 



conical . . . . . . . . .4 



Outer mouth papillae conical ...... 6 



4. Spines not hooked ....... 5 



Second and third ventral spine with a small, distally directed 



terminal hook ; 6-5 spines^ . . . A. Pcdmeri Lym. 



5. Spines 4-6, conical ; primary plates of disk generally distinct 



1. A. Chiajei Forbes 



^ Another species of Amphiura has been recorded from off the Portugal 

 coast, 552 m., namely, A. angularis Lyman (" Princesse Alice ") ; the 

 single specimen found was, however, only a young one, and Koehler himself 

 later on declared the identification doubtful, so that we maj^ leave this 

 species out of consideration. 



^ The outer mouth papilla of A. Palmeri is described as "flattened, a 

 little elongate, erect, somewhat narrower at its basis than its end, which 



P 



