358 Annals of the South African Museum. 



large plate; the proximal end of the jaws is not at all elevated or 

 swollen as it is so noticeably in adults. There are only 2 arm-spines 

 on each side of three or four basal arm segments. A specimen 7 mm. 

 across the .disk differs from this one chiefly in the complete separa- 

 tion of the radial shields, between which the distal radial plate and 

 the first upper arm-plate are in broad contact. One may now count 

 more than 75 disk plates but the additional ones are small triangular 

 scales, intercalated between the angles of the larger plates. Later 

 growth changes consist chiefly in the multiplication of these secondary 

 disk plates and in the increased size, especially width, of the basal upper 

 arm-plates, of which as many as 25 are in contact in large adults. 



P.F. 461 A. Off Cape of ' Good Hope, 34 38' S. x 18 33' E., 

 110 fms. Bottom? 1 specimen; young. 



P.F. 2216. Lion's Head, E. 18 miles, 104 fms. Blk. spcs, and r. 

 5 specimens; adult and young. 



P.F. 2714. Vasco de Gama Peak, N. 10 E., 13 miles, 85 fms. 

 Dk. gn. s. 9 specimens; adult and young. 



P.F. 2766. Vasco de Gama Peak, N. 40 E., 13 miles, 120 fms. 

 R. 1 specimen; young. 



P.F. 2798. Vasco de Gama Peak, N. 71 E., 18 miles, 230 fms. 

 Stns. 1 specimen; adult. 



Bathymetrical range, 85-230 fms. 



OPHIURA IRRORATA. 



Oplnoglypha irrorata Lyman, 1878. Bull. M. C. Z., vol. 5, p. 73; 



pi. IV, figs. 106-108. 

 OpTiiura irrorata Meissner, 1901. Bronn's Thierreichs, vol. 2, pt. 3, p. 925. 



This characteristic species from the abyssal fauna is represented 

 in the PIETER FAURE collection by a good series of 21 specimens, 

 ranging from 6 to 27 mm. in disk-diameter; the arms are broken 

 in every case, usually proximal to the middle. The only growth- 

 changes of importance shown are in the upper and under arm-plates, 

 for in the smallest, as in the largest specimen, the primary disk- 

 plates are obvious but separated by numerous, less well-defined, more 

 or less overlapping plates, and the upper arm-spine is near the top 

 of the side arm-plate widely spaced from the other two. This 

 arrangement of the little peg-like arm-spines is one of the best and 

 most invariable specific characters at any age. In the smallest 

 specimen, only a few basal upper arm-plates are in contact, and 

 only the first two are tetragonal and wider than long. In older 

 specimens, more of the basal upper arm-plates are wider than long 



