86 



PROP. P. M. DUNCAN ON THE OPHIURIDJ3 



II. List of the Species described or noticed in this 

 Communication. 



Order OPHIUEIDA, J. Midler. 



Family Ophiolepidje, Ljn. 



Ophiolepis cincta, Mull. § Trosch. 



nodosa, sp. nor. 



Ophioglypha, Lyman, numerous 

 young forms. 



Family Amphiurid^b, Ljn. 



Ophiophragmus affinis, sp. nov. 



difficilis, sp. nov. 



Ophiocnida sexradia, sp. nov. 



Family OrniocoMiD,E, Ljn. 

 Opbiocoma scolopendrina, Lrnk., sp. 



Family Ophiothricid^e, Ljn. 



Ophiothrix Andersoni, sp. nov. 



merguiensis, sp. nov. 



Marten si, Lym. 



variegatus, sp. nov. 



variabilis, sp. nov., and four 



varieties. 



Opliiocampsis pellicula, gen. et sp. 

 nov. 



Ophiocnemis marmorata, Lrnk., sp. 



III. Description of the Species. 



Grenus OpHroLEPis, Mull. Sf Trosch. 



Ophiolepis cincta, Mull. Sf Trosch. 

 Locality. King Island. 



Ophiolepis nodosa, sp. nov. (Plate VIII. figs. 1-3.) 



Disk large, much notched over the arms, covered with very small 

 wide-apart radial shields and a thick skin ornamented with large 

 knobs placed symmetrically and surrounded by small irregular 

 scales. Large projecting knobs in the interbrachial spaces. 

 Below, the scaling is both large and small, and the smaller plates 

 surround the larger ; large scaling at the margin. 



Mouth-papillsc numerous, and with accessory papillae. A sup- 

 plementary plate orally to the mouth-shield. Arms short and 

 broad ; upper arm-plate nodular ; small accessory plates on 

 either side of upper and lower arm-plates ; four to six very small 

 spines along the arm. Two tentacle-scales. 



Description of the Specimen. — Disk nearly as wide as the 

 length of an arm, tumid above and at the margin between the 

 arms, notched over them. Nodules five in centre, two in each 

 interradial space, and five largest between the central group and 

 the radial shields. Kadial shields very small, naked, almond- 

 shaped, widely separated by two nodules and intermediate 

 Scaling. Scales between the nodules varying in shape and size, 

 never regular or in single series. At the margin, between the 

 arms, the nodules are very large and five in number, and sepa- 

 rated by a narrow scaling. Immediately below these are five 



