PAL^OTROPUS JOSEPHIN.E. 53 
such genera as Hemiaster, Rliinobrissus, Linthia, Schizaster, etc., on the one 
side; and on the other, in such genera as Paleopnenstes, Maretia, Lino- 
pneustes, Homolampas, etc., we find the more or less rudimentary lateral 
fasciole plainly developed from the anal or branches of the subanal fas- 
ciole, or independently. 
This corresponds fairly well with the two series we find among the fossil 
genera, in one of which the lateral fasciole is the appendage of the peri- 
petalous fasciole, and in the other of the fasciole of the anal system, or has 
arisen entirely independently as an ambital lateral fasciole, if I may so 
call it. 
Palaeotropus Josephinse LoviSn. 
Off Havana, Lesser Antilles. 82-242 fathoms. 
For list of Stations, see Bull. M. C. Z , VIII., No. 2, p. 81, 1880. 
PI. XXIII. Figs. 6~U. 
^Vv«r 
A small specimen 10 mm. long did not differ from that figured by Loven 
(PI. XIII. Figs. 108-113, Eludes sur ks Eclmoidees). Older specimens meas- 
uring 23 mm. in length, figured on Plate XXIII., are comparatively less 
globular and more fiattened, but otherwise do not vary greatly in appearance 
from the younger specimens. In the Preliminary Report * on this collection 
I had referred a few larger Spatangoids to this species ; but on denuding 
them from spines I find that they have nothing in common with Palaeotro- 
pus, and they are described in this Report as belonging to a new genus 
(Pateobrissus) intermediate between Platybrissus and Argopatagus. 
The test of this species is comparatively bare (PI. XXIII. Figs. 5-11), car- 
rying but few primary spines ; these are generally straight, with a smooth 
shaft, only a few of the very largest spines being slightly serrated. The 
miliaries and secondaries are more numerous, generally club-shaped at the 
extremity, often curved, and many of them with serrated shafts. The mili- 
ary tubercles of the anal fasciole carry comparatively long, slender, slightly 
club-shaped spines. 
The coloring of small specimens is of a greenish violet, the whole test 
being irregularly covered with distant dark violet pigment-spots. With in- 
creasing size these spots become less numerous, concentrating mainly about 
the base of the primary spines. 
* Bull. M. C. Z., VIII., No. 2, p. 81. 
vV^ 
