9. PL 91. 



^ 



^r l^-^;,*# 



1%. 10 ^1 



"i; 



/'aig. 



I, 3. Dingy Shell. f, 4- Small Yellow Wave. 5, 6. Small White Wave. 



T, 9. Waved Carpet. 8, lo. Blomer's Rivulet. 



