-^ JE**>f.J** 



THE OPHIURIDiE. 



127 



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edge is concave ; the two next have inner end truncated; outer edge curved ; 

 they are not separated by the side arm-plates. There is almost no incisure 

 in the disk at the base of the arms. 



Disk covered with rather coarse, overlapping scales, among which the 

 primary plates are not conspicuous. The central plate is five-sided, with a 

 little scale at each corner. Radial shields rather short, not very conspicu- 

 ous, meeting broadly without, separated within by one or two scales; they 

 do not meet in the median line, but the right radial shield overlaps the left. 

 In the interbrachial space there is a rather large marginal plate, which 

 connects the radial shields of each two adjoining arms. Under side of the 

 disk covered with a few rather large scales. The edge of the disk is sharp. 

 Genital scale rather broad ; the papillae along the genital slits very small 

 and indistinct, rounded; they become somew^hat larger as they pass to the 

 dorsal side of the arm to form the arm-comb ; only three or four papillae to be 

 seen from above ; there is no secondary arm-comb. The genital slits begin 

 at the first ventral plate, the papilte only at the end of the mouth shield ; 

 along the inner part of the slit there is a long, narrow scale, adjoining the 



side edge of the mouth shield. 



Three short arm-spines, the upper one a little apart from the other two. 

 First tentacle pore not opening into the mouth space ; on the second to 

 fourth joint they rapidly diminish in size ; beyond the fourth there are no 

 pores at all. Tentacle scales : first pore has 4 on outer, 3-4 on inner side ; 

 second, 1-3 on outer, 2-3 on inner side; third, 1-2 on both sides; fourth, 

 1-2 on outer, none or a very small one on the inner side. On the next 

 joints a little rudimentary tentacle scale sometimes may be found. 



Color in alcohol : gray. 



One specimen from Station 3364, 902 f. 



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17. Ophioglypha divisa n. sp. 



Plate IV. Figs. 10-13. Plate V. Figs. 1, 3 



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Diameter of disk, 11 mm. ; width of arm close to disk, 2 mm.; length of 

 arms unknown, but presumably about 3-4 times the diameter of the disk. 

 Mouth papillae 5-6 on each side, short, square, making a close line ; the 

 outermost ones a little broader than the others; one diamond-shaped at 

 the apex of jaw, scarcely longer than those at the sides. Mouth shield 

 very curious; divided by a median line, which bifurcates at the outer 



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