464 PEOr. p. M. DUNCAN ON SOME 



three small spines, is rather thick. The spines are short, rather 

 stout ; the middle one the largest, blunt, with a small base of at- 

 tachment, and 'it rarely surpasses the upper arm-plate in length. 

 The tentacle-scale is large and oval in shape. 



Locality. Korean Straits, 33 fathoms. Collected by Capt. St. 

 John, E.N. 



In the British Museum. 



Ophioneeeis imjbia, Audouiii, sp., var. sinensis, nov. 



This Ophiuran species was delineated with great exactitude by 

 Audouin in Savigny's ' Descr. de I'Egypte,' 1809, pi. 50 ; and after- 

 wards it was termed OpTiiolepis dubia by Miiller and Troschel, 

 *Syst. Asterid.' p. 94. Subsequently Lyman placed it in the 

 genus OjpMonereis, and termed it Opliionereis duhia, Lyman. The 

 credit of discovery and of accurate representation clearly belongs 

 to Audouin in the first instance. 



Lyman states that the specimen figured doubtless came from 

 the Eed Sea, as the species is not found in the Mediterranean. 



The form from the Korean Sea is well grown, and differs from 

 the type as follows : — The lower arm-plates have a median notch 

 and eminence ; the spines are sub equal, and they are rarely 

 banded with colour. It has a marsupium, and doubtless, as 

 was commonly the case in these Korean species, it was Advi- 

 parous. 



Locality. Korean Sea, with Opliionereis variegata, nobis. Col- 

 lected by Capt. St. John, E.N. ' 



In the British Museum. 



G-enus Amphiitea, Forbes. 



Amphiuea Lutkeni, sp. nov. Plate X. fig. 17. 



The disk is tumid, swollen at the sides, and slightly con- 

 stricted in the interbrachial spaces. It is covered with very 

 small, subequal, overlapping scales, which are still smaller beneath. 



The radial shields are small, long, and narrow; broader ab- 

 orally, where they ajDproach and sometimes touch, smaller and 

 separated by a mass of scaly derm within, where they are more 

 or less overlapped by scales. 



The mouth-shields are somewhat diamond-shaped, about as 

 long as broad, angular without and at the sides, and well- 

 rounded within ; the madreporic is the largest and is almost cir- 

 cular in outline. All are continuous aborally with a furcate 



