ASTEROIDEA 127 



superomarginals which very gradually decrease in size toward the end of ray, whereas in 

 falklandica the terminal 4 or 5 plates increase in size. The plates vary greatly in the 

 number (1-5), size, and position of the tubercles and pedicellariae. 



Except at tip of ray, the inferomarginals are distinctly larger than the superomargi- 

 nals and are irregularly 4- to 6-sided. Owing to the covering of granules and tubercles 

 they are not at all clearly marked off from the actinal plates. The usually 4 or 5 unequal 

 tubercles are very irregularly distributed, while the valves of the large pedicellariae are 

 sometimes subdivided into 2 or 3 to allow for a slight curvature. 



The marginals are entirely different from those of phrygiana, in which the supero- 

 marginals carry i or 2 central thimble-shaped tubercles and the inferomarginals, 1-5, 

 and only exceptionally a pedicellaria. In H. heathi the marginal spines (usually several 

 to a plate) are much more prominent even than in phrygiana, but the proximal supero- 

 marginals and nearly all the inferomarginals carry, in addition, a bivalved pedicellaria, 

 as in falklandica. Instead of the neat peripheral series of granules of phrygiana, heathi 

 approaches falklandica in having stout unequal conical granules in i or 2 interrupted 

 series. But most of the surface is taken up by the stout spines and pedicellariae. 



Actinal intermediate areas. Nearly all the plates are occupied by exceptionally 

 long low bivalved pedicellariae (lower and longer than in my specimen of phrygiana), 

 and are bordered by a series of very unequal, coarse, often squarish or prismatic 

 granules. Interspersed smaller plates, especially near margin of area, carry i or 2 sub- 

 spherical tubercles slightly smaller than the largest abactinal ones. In heathi these 

 tubercles are short thick spines, shorter than the prominent marginal spines. 



Adambulacral armature. Furrow spines more often 2 than 3, coarse, compressed, 

 round-tipped. Behind these are 3 subambulacral tubercles, the inner shorter but 

 broader than the furrow spines, round-tipped, broad side to furrow; the next is about 

 half as long, but wide, often ovate in shape; the outer or third is usually an enlarged 

 granule of a group which occupies the outer end of plate and extends along either 

 transverse margin part way to inner end of plate. On the first plate (and in one series on 

 the second and third) the subambulacral tubercles are replaced by a large bivalved 

 pedicellaria. Orals 5 or 6, suborals i or 2, similar to but heavier than corresponding 

 adambulacrals. 



Type locality. St. WS 99. Falkland Islands, 49° 42' S, 59° 14' 30" W, 251-225 m., 

 fine dark sand, i specimen. 



Family GANERIIDAE Perrier 

 Genus Ganeria Gray 

 Ganeria Gray, Proc. Zool. Soc. Loud., 1847, part 15, p. 83. 



Ganeria falklandica Gray 



Ganeria falklandica Gray, Proc. Zool. Soc. Lond., 1847, part 15, p. 83. — Sladen, 1889, p. 383, pi. 60, 



figs. I, 2; pi. 62, figs. 6, 7. — Meissner, Arch. Naturgesch., 1896, p. 94. — Koehler, 1923, p. 71. 

 Ganeria hahni Perrier, 1891, p. 118, pi. 11, figs. 3a, 36. — Koehler, 1923, p. 72, pi. 9, figs. 3, 4. 

 Ganeria robusta Perrier, 1891, p. 119, pi. 11, figs, la, ib. 

 Ganeria papulosa Perrier, 1891, p. 121, pi. 12, figs. la, ib. 



8-2 



