THE CRIXOIB HYPOCRIXUS. 905 



It will be noticed that the width is here on the anterior, rather 

 than on the posterior, side. 



The Radials have a height of circa 5-4 mm., a width below of 

 6-6 (r. ant.), 6-3 (ant.), 5-7 (1. ant.), and a width above of circa 

 1"7 mm. 



The Facets (PL XC. fig. 5), with their ventral grooves, are 

 rather clearer than in the holotype, but still no muscle-scars can be 

 detected. From the cavity of the cup to the outer edge of each 

 facet is circa 1 mm., and this is also tlie width of each facet. 



The Periproct has a rather more regular shape than in the 

 holotype, and its upper angle is slightly produced adorally. The 

 height of the opening is 2-4 mm., the width 2 mm. 



" Hypocrinus " PIRIFORMIS. (PI. XC. figs. 7-10 ; text-fig. 160.) 

 1892. Hypocrinus (i) pi/7'iforinis A. Rothpletz, 1892, p. 75, 

 pi. X. f. 23. 



As will appear from the description, this species must be placed 

 in a new genus. So loug as the imperfect holotj^pe was the only 

 available speciaien, the curious features of its structure might be 

 interpreted as abnormalities, and the proposal of a fresh name 

 was scarcely justified. The material obtained by Dr. Wanner 

 and the facts which he has very kindly communicated to me 

 render a more precise interpretation possible and necessitate a 

 new genus. That Dr. Wanner may not be deprived of the 

 fruits of his own discoveries, I leave to him the privilege of giving 

 it a name and of completing my imperfect description. 



Holotype. — The unique specimen figured by Rothpletz and 

 preserved in the Mineralogisch-Geologisch Tnstituut te Utrecht. 



Locality. — Ajer Mati, S. of Kupung, Southern Timor. Dr. J. 

 Wanner has recorded this [or possibly an allied] species from 

 Fatu Bitaoni (or Bitaunu) in Insana district, Timor (Centrlbl. f. 

 Mineral. 1910, p. 737). 



Description of Holotype. — A dorsal cup with no trace of stem, 

 anal plates, or tegmen. Stained pinkish. Matrix fragmentary 

 organic limestone with crystalline cement. General shape 

 elongate-pyriform ; somewhat irregular owing to peculiarities in 

 the radial circlet ; with a tendency to be flattened along the per- 

 radial meridians, or, conversely, to be broadly ridged along the 

 interradial meridians, from the top of the basals downwards. 

 This produces a sub-pentagonal cross-section. Height circa 

 43 mm. Greatest sagittal diameter 28 mm. Greatest trans- 

 verse diameter 31 "5 mm. These diameters are measured by 

 callipers with the jaws parallel to the main axis of the cup ; 

 but the diameters are not at right angles to the main axis. 

 On the left-hand side the greatest projection is 26'7 mm. 

 above the basal plane, on the right-hancl side it is 24'5 mm. 



The Stem-facet was broken away, and the proximal end of the 

 cup was therefore slightly ground down by Di'. Rothpletz (PI. XC. 

 fig. 7), who says that it " liisst in der Mitte einen Centralca.nal 

 erkennen, von welchem die drei .Niihte der Basalia [^. e. IBB] 



