1S88.] PROF. BELL ON NEW SPECIES OF OPHIURIDS. 281 



Calorhamphus hayii (Gray). 



Calorhamphus hayii, Oates, t. c. p. 138; Hume, Str. F. 1879, 

 p. 53. 



"No. 106. cJ ad. Gunong Batu Putch (3400 feet). 

 " Irides red-brown ; legs and feet orange." 



3. Descriptions of Four new Species of Ophiurids. 

 By Prof. F. Jeffrey Bell, M.A., Sec. R.M.S. 



[Received April 26, 18S8.] 



(Plate XVI.) 



The descriptions of the Ophiurids that follow will, I think, be of 

 interest to workers at the systematic zoology of the grou|)— one 

 to which, without doubt, we have still to add many interesting and 

 important forms. 



1. Pectinura ramsayi, sp. nov. (Plate XVI. figs. 1, 2.) 



Beneath the superficial granulation of the disk are fine scutes ; 

 there are pores between the first and second arm-joints only ; the 

 radial shields are naked ; there are eight arm-spines and two ten- 

 tacle-scales. 



This is so obviously a distinct species that I have no hesitation in 

 describing it from a single example. 



The disk is not puff"ed or swollen, and has a diameter about one 

 sixth the length of the arms ; these taper gradually, and the joints 

 are laterally compressed. There are seven moutli-papilloe, of which 

 the penultimate is quite twice as large as any of the rest ; the month- 

 shield is in the form of an irregular pentagon, the two outer beiu" 

 shorter than the two inner or adoral sides ; the accessory mouth- 

 shield is semicircular. The upper arm-plates are quite twice as long 

 as broad, and have fairly straight sides ; the side-plates generally 

 carry eight subequal arm-spines ; the first lower arm-plate is lenti- 

 cular ; the rest are wider than long, widely separated from one 

 another on either side owing to the encroachment of the side-plate; 

 the adoral and aboral edges are straight. The radial shields are 

 small, irregularly oval, the (jroximal pole being narrower than tlie 

 distal ; the granulation on the lower is rather coarser than that on 

 the upjier surface of the disk. 



The general colour of the specimen is greenish above, but the 

 radial shields are pink, and there are, at intervals, patches of pink 

 on the arms, about every fifth dorsal plate being pink ; below, the 

 creature is lighter in colour, with darker bands on the arms. 



Diam. of disk 17 mm. ; length of arm 68 (ca.) mm. 



Hah. Port Jackson ; in coll. B.M. 



The only other known species in which there is a fine scutellation 

 with pores between first and second arm-joints only is P. mandata. 



