Diatomaceae of Philadelphia Plate 20

Description:

Description: English: Illustration from Diatomaceae of Philadelphia and Vicinity. Original description follows: PLATE 20 Fig. 1: Dictyoneis marginata var. maxima n. var. 2: Dictyoneis marginata var. commutata Cleve. 3: Dictyoneis marginata var. typica Cleve. 4: Diploneis crabro var. pandura (Bréb.) Cl. 6: Diploneis campylodiscus (Grun.) Cl. 7-8: Diploneis gruendleri (A. S.) Cl. 9: Diploneis crabro Ehr. var.?. 10: Diploneis excentrica n. sp. 11: Diploneis fusca var. delicata (A. S.) Cl. 12: Diploneis puella (Schum.) Cl. 13: Diploneis crabro var. pandurella Cl.?. 14: Diploneis elliptica (Kuetz.) Cl. 15: Diploneis crabro var. expleta (A. S.) Cl. 16: Diploneis geminata (Grev.) Cl. 17: Diploneis smithii (Bréb.) Cl. 5: Navicula lyra Ehr. var.?. Date: 1916. Source: https://archive.org/details/diatomaceofphi00boye. Author: Charles Sumner Boyer (1856-1928).