Plate loo. 



Fici. 1. i'ri jiclhtxtir spat lilifcr, type; distal articulatiiiii surface of auil)ulacral 

 and adaiiiliiihural plates, as seen on the periphery of disk after re- 

 moval of ray : on the right 2 adamhulacrals of adjacent rays are 

 shown, X 8. la. SauK^: fourteenth and fifteenth adanibulacral plates, 

 X n.G. '[I), Ir. Same; third and sixth subanibulacral spines, X 9.6. Id, 

 Ir. If. Same: end of a sixth, and the ninth and eleventh subanibulac- 

 ral spines. X *.).i\ 1//. Same; a pedicellaria (lenirth. 0.038 mm.) from a 

 lateral spine, X 4(M». 1/). Same; a pedicellaria from the larger, al)oral 

 furrow spine (sixth, 0.33 mm.), X 120. 1/. Same; tips of jaws of l/(, 

 showing about three-fourths of their breadth. P. 538. 



2. Pcdircllnster chirophorns, type; second and third adambulacrnl plates, 



showing the 3 spines which occur on the first few plates of each series 

 (2 on the others) and one of the large "cat-claw" pedicellariae at- 

 tached to outer end of plate ; X 10. '2(i. Same ; a few plates of the 

 side of ray. near base ; s, superomarginal ; /, inferoniarginal ; act., 

 outer series of actinal Intermediate plates; X 8. '2h. Same; one of 

 the minor ])e(licellariae enlarged 80 times. P. 499. 



3. Tarsastcr (JisticJtoini.s, type; plates of the ray from the adami)ulacral 



{(t) to midradial series (top) shown as if wall of the ray were spread 

 out flat ; i, inferoniarginal ; s, superomarginal ; r, midradial series ; 

 the 2 series of dorsolateral plates and connectives are shown between 

 the superomarginals and radials. Taken at about the middle of ray, 

 X 8. 3o. Same; adanibulacral and inferomarginal armature, at end 

 of the i)roxima] third of ray, X 8. 3^*. Same; an unguiculate, for- 

 ticiform jjedicellaria from an adanibulacral plate. X about 32. 3c. 

 Same; one of the forcipiform pedicellariae, X SO. P. 490. 



