PLATE ARKANGEMENT OF SPECIMENS 2991 AND 3021. 



167 





a 





>> 



S 



"S 



c3 







m 







^ 



=t-r 



vT 







c 





ee 





o 













^4 

 s 



o 









Melonites multiporus. 

 Museum of Comparative Zoology- 



o a> 



X5 

 S 



> 





sTc 



O ;-, 



Heptagon on left or right 











c-r; 

 to 3 



of terminal pentagon. 



catalogue number 2991. 



F= 



s 





£ 



s ■ 







S 





iO 



D 



d 























-^ 



o 





S^ 



O 



o 







/^ 



o 



^ 



o 



o 



O 





















Ambulacrum J 



Interambulacrum A*. 



Ambulacrum B 



Interambulacrum C*. 



Ambulacrum D 



Interambulacrum E*.. 



Ambulacrum F. 



Four columns of plates at base. 



8 



P 



19 



4 



3 



7 



P 



15 



3 



3 



6 



P 



11 



3 



2 



5 



P 



7 



2 



2 



4 



P 



3 



2 



1 



3 



X 



2 



1 



1 



Left. 



Right. 



Left. 



Right. 



Truncates initial plate 3. 



PMrst row of plates and ventral border of second row wanting. 



Four columns of plates at base. 



8 



P 



18 



4 



3 



7 



P 



13 



3 



3 



6 



P 



9 



2 



S 



5 



P 



6 



2 



2 



4 



P 



3 



1 



2 



3 



X 



2 



1 



1 



Right. 



Left. 



Right. 



Right, 



Truncates initial plate 3. 



First row of plates wanting. 



Four columns of plates at base. 



7 



P 



13 



3 



3 



6 



P 



10 



2 



3 



5 



P 



6 



2 



. 2 



4 



P 



3 



1 



2 



3 



X 



2 



1 



1 



Right. 



Right. 



Left. 



Truncates initial plate 3. 



First row of plates hidden or wanting. 



Four columns of plates at base. 



Melonites multiporus. 



Museum of Comparative Zoology 

 catalogue number 3021. 



Interambulacrum Af 



9 



P 



21 



4 



4 



8 



P 



17 



S 



U 



7 



P 



13 



3 



3 



6 



P 



<) 



3 



2 



5 



P 



6 



2 



2 



4 



P 



3 



2 



1 



3 



X 



2 



1 



1 



Right. 



(?) Not visible. 



Right. 



Left. 



Right. 



Truncates initial plate 3. 



Two plates in first row. 



Ambulacrum B. 



Four columns of plates at base. 



Interambulacrum Cf 



(Figured on plate 2, figure 7 ) 



9 



P 



21 



5 



S 



8 



P 



17 



4 



3 



7 



P 



13 



3 



3 



6 



g 



9 



3 



2 



5 



P 



6? 



2 



2 



Left. 



I 



Right. 



Heptagon on left and right. 



Right. 



First three rows of plates wanting. 



* Interambulacrum wanting at the dorsal portion of the area. 



t Intel-ambulacrum complete at the dorsal portion of the area. 



I Ventral border of plate 3 invisible. 



gThis plate is tetragonal in form (see plate 2, figure 7), and to compensate for the loss of two 

 sides there are two heptagonal plates, one on either side of tetragon 6. 



I! No heptagonal plate next pentagon 8, but a heptagonal plate exists in the row below pentagon § 

 and in column 5. (See plate 2, figure 7.) 



XXIII— Bull Geol. Soc. Am., Vol. 7, 1895. 



