Fios. 488-501. — Pinnule tips of vabiohs comatdlids. 488. Ctllombtba soluta, laterai, vikw. 489. 

 Same, dorsal view. 490. Cottlometba obnata, lateral view. 491. Same, dorsal view. 492. 

 Oligombtba imbbicata, lateral view. 493. Same, dorsal view. 494. OnaoiiETBA sebbipinna, lat- 

 eral VIEW. 495. Same, dobsal view. 496. Oligometba sebbipinna, dobsal view. 497. Sam», 



LATERAL VIEW. 498. Pi OF ADSTROMETRA THETIDIS. 499. EnPANDED GENITAL PINNULE OF AUSTHO- 

 METRA THETIDIS IN DORSAL VIEW. 500. AUSTROMBTRA THETIDIS, TIP OF Pi IN TBNTEAL VIEW. 501. 

 ACSTEOMBTBA THETIDIS, TIP OF DISTAL PINNULE, LATERAL VIEW. 



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