PLATE 11. 
Page 
1 - G. Orth is tubulostriata. 166 
1-3. Young individuals of this species. 
4 & 6. Larger individuals. The two figures on each side of the central figure 0 are enlarge¬ 
ments of striae; one without the tubular openings, the other showing this character. The 
righthand figure of the line shows the cardinal and brachial processes of the dorsal valve, 
and the lefthand figure is the profile of fig. G. 
7 - 14. Orthis eminens. 167 
7 - 10. Young individuals. 
12. Three views of a specimen of medium size. 
13. Three views of a larger individual. 
The specimens 12 and 13 are well-marked and characteristic forms of this species. 
11 & 14 are referred with doubt to this species. 
