Bd VI: 4) THE ECHINOIDEA. 89 



and the pores accordingly distant. Tliis 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 Abatiis; they form a short, but distinct tuft on either side of the posterior 

 end of the actinal side. 



The pedicellariae are very like those of Abatns. Globiferous pedicellaria; have 

 not been found; if they occur at all, they will probably be found to be very like 

 those of Abatns, as is the case with the rostrate pedicellaria;. The tridentate pedi- 

 cellariae (PI. XIX Figs. 18, 34, 44) are slightly different {xoïVl'i\\osç: o'i Abatns 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 inay 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 ^Heiniaster cavernosus^ by Meissner) (sDie 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. Xo 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. 56°20' W. mentioned in 

 the »Hassler» Echini is not beyond doubt.) 



All the specimens (5) examined by me are males. 



12 — 100133. Sch-uedische Siidpolar-Expcditicn iqoi — IÇOJ. 



