Bd VI: 4) 
THE ECIIINOIDEA. 
89 
and the pores accordingly distant. This feature I find likewise distinct in the type 
specimen. — The tubefeet of the odd anterior ambulacrum are, in accordance with 
the size and distance of the pores, very small and distant. The sucking disk is very 
little developed, the rosette-plates very small, not elongate. The spicules are small 
irregular rods, very few in number; they are found only just below the disk. The 
anal tubefeet are quite rudimentary, their pores being simple. The labrum ends off 
the middle of the first adjoining ambulacral plates. The latero-anal fasciole passes 
over the nth — 12th ambulacral plate. The spines are rather short and more delicate 
than in Abatus ; they form a short, but distinct tuft on either side of the posterior 
end of the actinal side. 
The pedicellariæ are very like those of Abatus. Globiferous pedicellariæ have 
not been found; if they occur at all, they will probably be found to be very like 
those of Abatus , as is the case with the rostrate pedicellariæ. The tridentate pedi- 
cellariæ (PI. XIX Figs. 18, 34, 44) are slightly different from those of Abatus caver- 
nosus , being somewhat broader in the lower part of the blade; they may have a 
distinct median longitudinal keel or be gently rounded; also the outer end of the 
blade may be somewhat pointed or simply rounded. Two-valved specimens occur, 
but rather seldom. 
The colour of the denuded test is stated by AGASSIZ to be »grayish-pink», that 
of the spines light-green. In a very fine specimen from the Hamburg Museum the 
test and spines are quite white, the fasciole light brown; probably, however, the 
white colour is due to the preservation. In a dried specimen from Chili (the Berlin 
Museum) the spines are brownish, in a small space distinctly violet; the test of this 
specimen is also brownish, as in A. cavernosus. 
This species was not taken by the Swedish South Polar Expedition and not by 
the Fuegian Expedition either. The specimens before me are from Chili (wrongly 
identified as » Hemiaster cavernosus » by MEISSNER) (»Die von Herrn Dr. Plate aus 
Chile heimgebrachten Seeigel» p. 87), from the Magellan Strait (R. Mulach) and 
from 49°35’ S. 64°43' W. 62 fathoms. No other more definite statements are found 
in literature regarding the geographical and bathymetrical distribution of this species. 
(The identification of the small specimens from 37°42' S. 5Ö°20' W. mentioned in 
the »Hassler» Echini is not beyond doubt.) 
All the specimens (5) examined by me are males. 
12 — 100133. Schwedische Südpolar-Expedition igoi — iÇop. 
