NO 1565 HA WAIIAN HOLOTHVRIANS— FISHER. 697 



in the hinder half of body. In Hluiter's species there is a single row 

 of about thirty large pedicels all along these radii, and in addition 

 numerous scattered slender and smaller papilla^ and pedicels which do 

 not appear to form a singU> series as in retlfcr. The lateral pedicels 

 oi jmrpureo-punctatus are apparently larger than in retifet^ and there 

 is no fringe of papilla? under the anus as in retlfer; neither is the body 

 wall so thick and jelly-like. Ka?hler and Vaney have created a genus 

 Bathysona^ to which this species is possil)ly referable. Bathyzona 

 has the general form of Ppelo}iatlde><^ but the pedicels instead of being 

 limited to the medium radius of the ventral surface, form 4 distinct 

 rows, two median and two lateral, the latter near the border. T^^pe 

 is B. incerta Koehler and Vaney, which has t) tentacles and triradiate 

 calcareous bodies not unlike those of PaelopntldeK. The internal 

 organization is unknov/n. Pselopatides purpuTeo-punctatuii is by no 

 means typical, but does not seem to be referable to Bathyzona. Until 

 the anatomy of this genus is better known I prefer to rank retifer in 

 Pselopatides. The distribution of pedicels in connection with the 

 absence of deposits will serve easily to distinguish it from any species 

 refei'red to Pselopatides. 



Family P:LPIDI1D^E Theel. 



Elpidiidie Theel, Challenger Holothurioidea, Pt. 1, 1882, p. 10.— Ludwig, Mem. 

 Mus. Comp. Zool., XVII, No. 3, 1894, p. 39{=E/asip<><hi Theel). 



Subtainily I3EI]VIATIIvr.3^: (Xheeli Ijtulwi;^. 



Deimatidie Theel, Challenger Holothurioidea, Pt. 1, 1882, p. 60. 

 Deim.atmse'LvD\\iG, Mem. Mus. Comp. Zool., XVII, No. .3, 1894, p. 63. 



Genus SCOTODEIMA Ludwig. 



Scotodeima Ludwig, Mem. ]\Iu^'. Comp. Zool., XVII, No. 3, 1894, pp. 74, 75. 

 Type, S. setigerum Ludwig. 



Twenty moderately large tentacles; along each ventrolateral radius 

 a double row of large pedicels, and above them a series of long slender 

 nonretractile papilla (Hank-papilhe); a double row of similar papilla 

 on each dorsal radius; median ventral radius with a few scattered 

 smaller pedicels; mouth and aims ventral. Deposits: Stout simple rods 

 and four-armed rods, more or less modified; all deposits of relative!}" 

 large size. The genus stands between Orp/on/zyi/s and Oneirophanta. 



SCOTODEIMA VITREUM, new species. 



Plate LXXIV, figs. 2, 2a; Plate LXXV, figs. 1, \a-e, 2, 2a-c, 3, 4; Plate LXXVI, 



figs. 1, la-c, 2. 



General contour of body elliptical with nearly equally rounded ante- 

 rior and posterior extremities. Ventral surface flattened; dorsal sur- 

 face well arched; ventro-lateral margin as well rounded as permitted 

 by relatively immense papillte. Mouth and amis ventral, the former 



