^ NATURAL HISTORY BULLETIN. 



Chall., p. 88, pi. II, figs. 16-18). Mr. Lyman also recorded 

 it. with a mark of doubt, from off Bermudas, in 435 fathoms. 

 Possibly the example from the latter place may have been 

 identical with our species. 



Ophiomusium sculptum Verrill, sp. nov. 



Plate II; Figure 2. Plate VIII; Figure 2. 



Five arms. Disk flattened, ten-lobed, owing to two pro- 

 jecting tubercles on each interradial margin. Upper surface 

 covered with large plates bearing clusters of coarse granules. 

 Five interradial plates surround a larger central one; these 

 are surrounded by a regular circle of ten angular plates, five 

 of which are radial and five interradial; their acute ends 

 are directed outward so that they form a ten-rayed star; 

 the points of the five radial plates separate the inner ends 

 of the radial shields. The latter are larger, irregularly 

 polygonal, nearly or quite in contact at one point, but separ- 

 ated distally by a large sub-triangular plate, which, like the 

 radial shields, is unevenly verrucose and rough and bears a 

 cluster of granules. A very large, thick, rough, and swollen 

 bilobed plate occupies the whole of each interradial margin 

 and extends beneath to the oral shield. The upper arm- 

 plates are small and become obsolete at about the twelfth 

 joint; the first one is swollen, triangular, with rounded corn- 

 ers, and bears a central granule. The next is smaller and 

 more sharply triangular; the following ones decrease regularly 

 in size to the last. The radial shields are very large, longer 

 than broad, with the inner part sub-triangular and the outer 

 portion transversely oblong. The outer end is truncated; the 

 outer lateral lobes are obliquely truncated, the sides strongly 

 incurved, the inner end acute. The lateral oral shields are 

 elongated, narrow, and irregular. The genital slits are very 

 narrow and sinuous. The mouth slits are very narrow. The 

 oral papillae are all consolidated. Tentacle-pores exist on the 

 first two joints, each with one or two minute tentacle-scales. 

 Under arm-plates, on the first two joints, are small shield- 

 shaped; on three or four following joints they are minute, 



