The Diatomaceæ of Philadelphia and Vicinity

PLATE 15

Reading edition

Fig. Page AMPHORA 1 Amphora robusta Greg. 65 3 Amphora crassa Greg. 65 4 Amphora obtusa Greg. 67 5-6-19 Amphora proteus Greg. 65 7 Amphora ovalis (Bréb.) Kuetz. 65 8-18 Amphora coffæiformis (Ag.) Kuetz. 66 9-10 Amphora lineolata Ehr. 66 11 Amphora areolata Grun. 66 12-21 Amphora ostrearia Bréb. 66 13 Amphora lævis Greg. 66 14-15 Amphora ocellata var. cingulata Cleve. 67 16 Amphora angusta var. culensteinii Grun. 67 17 Amphora arenaria Donk. 67 20 Amphora acuta Greg. 66 AURICULA 2 Auricula mucronata (H. L. Smith) Peragallo 69

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

AMPHORA

1 Amphora robusta Greg. 65

3 Amphora crassa Greg. 65

4 Amphora obtusa Greg. 67

5-6-19 Amphora proteus Greg. 65

7 Amphora ovalis (Bréb.) Kuetz. 65

8-18 Amphora coffæiformis (Ag.) Kuetz. 66

9-10 Amphora lineolata Ehr. 66

11 Amphora areolata Grun. 66

12-21 Amphora ostrearia Bréb. 66

13 Amphora lævis Greg. 66

14-15 Amphora ocellata var. cingulata Cleve. 67

16 Amphora angusta var. culensteinii Grun. 67

17 Amphora arenaria Donk. 67

20 Amphora acuta Greg. 66

AURICULA

2 Auricula mucronata (H. L. Smith) Peragallo 69