56 



this species sometimes referred to Taxocrinus and at other 

 times to Forbesocrinus. And again it is doubtful which word 

 has priority, in proper definition and illustration, though the 

 name, Taxocrinus was first proposed. If both genera are to 

 stand, we are inclined to think this species was correctly re- 

 ferred, by its author, to Forbesocrinus. The species described 

 by White under the name of Taxocrinus muUibrachiatus var- 

 collelti, is not a mere variety of this species. It is a valid 

 species and must be known as Taxocrinus colletti, if the genus 

 Taxocrinus is retained. 



We here copy Lyon and Casseday's specific description in 

 full, as follows: 



"Body subglobose, where the arms are folded inward as 

 usually the case; from the base to the free arms somewhat 

 discoid, robust, externally covered with minute granules. 



•'Basal pieces, three, similar in form and sizes forming by 

 their margin apparently the upper joint of the column, slightly 

 thickened opposite the middle of the species. 



•'Subradial pieces, five, in good specimens presenting five 

 obtusely angular pieces disconnected from each other, resting 

 apparently upon the supra columnar piece. 



"Radial pieces first series. Generally four in each ray, the 

 first five (resting between the angular points of the subradials) 

 are irregular in size and form, four are irregularly hexagonal, 

 twice as wide as high, the fifth pentagonal and much smaller 

 than either of the other. The second and third radials are 

 obscurely hexagonal, similar in form, differing slightly in size; 

 the fourth is axillary, obscurely six sided, rising into a long 

 angular point; on each of its oblique upper sides supporting 

 three pieces of the secondary radials, which are similar in form 

 and nearly as large as the first radials. The last of these be- 

 ing axillary, support on their upper oblique margins, each from 

 four to seven brachial pieces; these last are again axillary and 

 bear on one side a branch of from 25 to 30 pieces, on the other 

 branch, which is again divided on the sixth or seventh piece 

 above the first division of the arms, each branch of this last 

 division being composed of about 20 pieces. 



" Inter radial fields 1st series. These fields consist of about 

 fifteen pieces each, the first of which rests upon the upper ob- 

 lique margin of the first series. Usually hexagonal, small, this 

 supports two of the second row, similar in form and size; 

 these last again support three of the third row of the same 

 form, but a little larger; these again a fourth row differing 



