Plate 7. 



I'-ui. 1. Cloiodiscus 0) iciitalis ; specimen from station rtrt2T ; fifth and sixtli 

 adanibiilaoral plates and adjacent intermediate plates, showing the 

 membrane partly shrunken; adoi-al side of plates to the left, XO.."). In. 

 Same; second adaml)ulacral plate, dried, XG.'). 1//. Same: niiitli supcro- 

 marginal and inferomarginal plates showing narrow frei- surface and 

 broad margin;il web. Below the inferomarginal plate 2 actinal inter- 

 mediate plates are indicated, X8. le. Same; terminal plate of speci- 

 men from station 0423, XS. Id. Same; side view of 2 dried paxillae 

 fi'oui the iiro.ximai portion of radi.al region, Xs. \c. Same; dors.-il 

 view of 2 paxillae from alcoholic specimen. If. Same; dried specimen, 

 showing mouth, adambulacral, and 2 double series of actinal interme- 

 diate plates. From the median fasciole the spinelets have been partly 

 removed to show the articulation of plates. Back of the mouth plates 

 is shown the oral plate or odontophore (o). The surface of the 

 ad;imbulacriil plates, when the membrane is removed, is irregularly 

 sunken and pitted; in. inferomarginal plates; XO.r). P. 44. 



2. t>i(1<)ii(i.st('r iisiloiioti(.'< ; mouth and adambuhicral plati's of type; o, oral 



plate oi' odonlo]ihore ; X(j.5. 1*. 37. 



3. (!(iiii()i)cct< II a.sinticiis. type; jtaxillae from base of ray, near radial line, 



siiowing botii dorsal and side views, X8. So. Same; sixtii adam- 

 bulacral ])late, of which the aihu'.al side is to the left : X'k '.'th. Same; 

 eleventh adambulacral plate. "<."). ."*><•. Same: t liiiiy-fnnri li adambu- 

 lacral. and thirty-lirst iid'erom.nrginnl piatfs. oriented as in 3(/ and 3?^; 

 XT). P. 47. 

 554 



