282 PROF. BELL ON NEW SPECIES OF OPHIURIDS. [May 15 



where the arms are proportionately longer, the disk swollen, and the 

 accessory mouth-shield double or triple, and the colour is very differ- 

 ent ; but it may be of some significance to observe that that species 

 is from the not distant shores of New Zealand. 



2. Pectinura capensis, sp. nov. (Plate XVI. figs. 3, 4.) 



Beneath the superficial granulation of the disk are virell-marked, 

 somewhat swollen plates ; there are no pores between the arm-joints ; 

 the radial shields are naked ; there are ordinarily five short arm-spines 

 and two tentacle-scales. 



There are two representatives of this well-marked species, but, 

 unfortunately, none of the arms are complete. 



The disk does not appear to be puffed or swollen, and its diameter 

 is probably about one fifth the length of the arms ; there is a slight 

 ridge to the arms. There are seven or eight mouth-papillae ; the outer- 

 most is very small, the penultimate very large ; the mouth-shields 

 are triangularly cordiform, the sides faintly notched, the accessory 

 month-shields small and sometimes divided. 



The upper arm-plates are encroached upon hy the side-plates in 

 such a way that their lateral margins are acutely angulated, and the 

 plates are wider in their middle than along either the proximal or 

 distal edge ; the side arm-plates are a little swollen and projecting, 

 and ordinarily carry five short spines ; the under arm-plates have 

 the distal edge, which is concave adorally, nearly twice as long as the 

 proximal ; the sides are excavated by the two tentacle-scales, the 

 inner of which is obscured by lying behind the lowest spiue. 



The naked radial shields are rather small, irregularly pyriform. 

 There is very little difterence between the rather coarse granulation 

 of the upper and lower surfaces of the disk. 



The dried specimens are yellowish in colour ; darker bands ex- 

 tending over four or five joints of the arm are separated from one 

 another hy about five more lightly coloured joints. 



Diam. of disk 10 mm. 



Sab. Cape of Good Hope ; in coll. B.!M. 



According to the arrangement of Mr. Lyman (' Challenger Report,' 

 p. 14), this new species stands between Pectinura infernalis, in which 

 there are nine, and P. heros, in which there are three arm-spines. 



3. Ophiopeza assimilis, sp. nov. (Plate XVI. fig. 5.) 



A species very closely allied to, but apparently distinct from, 0. con- 

 jungens. Bell ; thus the arms are not carinated, are more, not less, 

 than four times the diameter of the disk, the granulation of the disk 

 is coarser, the radial arm-shields are less prominent, the mouth-shield 

 is of a somewhat different contour, and the arm-spines are subequal. 



I must confess that had this specimen come from Torres Straits 

 instead of Port Jackson, I should have greater hesitation in regarding 

 it as representative of a distinct species — great as the hesitation has 

 been. But the differences between the fauna of Port Jackson and 

 Torres Straits are, as we are now beginning to recognize generallj', so 

 considerable that the difference in habitat together with the number of 



