92 



s. GOTO 



" Specimen 4235^ lias slender, narrow rays (from above resembling a 

 Psilasfer somewhat) and numerous marginal plates with fairly wide fasciolar 

 fmTOWs. The intergi'adation is perfect, tlu'ough 4235* to 4286, a very short- 

 rayed form almost arcuately pentagonal, -with few superomarginal plates. If, 

 in the above table, the width of ray at base is compared with R, and the 

 proportion II : r taken into account, the great difference in proportion is at 

 once evident. 



" Ahadinal surface ; pcLXÏllœ. — ^In some specimens the epiproctal cone is 

 inverted^ in others very inconspicuous. In specimens with rays nearly the 

 same length the width of the paxillar area varies considerably, especially at 

 the end of ray, thereby giving some specimens a much more robust appear- 

 ance. The fact that in some examples the abactinal Avail is nearly plane, 

 except for the epiproctal cone, and much inflated in others is duo, of com'se, 

 to the condition of the animal at the moment of death, but is important as 

 magnifying one or two ti'ivial characters, such as the angle of marginal 



1) " From interradial line to tip of ray." 



2) " Measured from one interradial line, across abactinal surface to adjacsnt iuterradial line." 



3) " Spines on furrow edge of adambulacral plate ; one or more spines on sMrfasa of plate 

 not counted." 



