FKOM NEW YORK, NEW JERSEY, AND GEORGIA. 



EXPLANATION OF PLATE 12. 



161 



Fig. 1. Arcella artocbea, Leidy. Section of a test through the pores around the 

 aperture, showing nodules projecting internally; X 2000. Lakehurst. 

 •2, 3. DiFFLUGiA BACiLLiARUM var. ELEGANS (Pen.), Cash ; X 300. 2, Broad, and 



3, narrow, side \iews of test. Lakehurst. 

 4, 5. DiFFLUGiA Leidyi, sp. uov. ; X 320. 4, Side view ; 5, oral view. Lake- 

 hurst. 

 6, 7. Nebela collaris var. retorta, Leidy. 6, Test, x 310 ; 7, aperture, X 740. 



Penney's Pond, Good Ground, Long Island. 

 8,9. Nebela cratera, sp. nov. 8, Test, X 300; 9, aperture, X 800. Lake- 

 hvirst. 

 10. Nebela dentistoma var. lacxjstris, var. nov. ; X 260. Lakehurst. 

 11, 12. Nebela scutellata, sp. nov. 11, Broad view of test, x 320 ; 12, portion of 



test, X 1000. Lakehurst. 

 13, 14. Nebela tropica, sp. nov. ; X 450. 13, Broad, 14, narrow, side views of 



test. Borneo. 

 15-17. Nebela vitr^a, Penard. 15, Broad side view of test, X 320 ; 16, 17, 



portions of test, X 1000, Lakehurst. 

 18,19. QuADRULA symmetrica (WalHch), F. E. Schulze ; X 450. 18, Broad, 

 19, narrow, side views of test. New Jersey. 



20. Do. do. var. irregularis. Pen. ; X 450. Good Ground, Long Island. 



21. Do. do. var. CURVATA, var. nov. ; X 460. Penney's Pond, Good Ground, 



Long Island. 

 22,23. Heleopera nodosa, sp. nov.; X 320. 22, Broad, and 23, narrow, side 



views. Lakehurst. 

 24. Do. do. X 250. Broad side view of test. Lakehurst. 

 25-27. EuGLYPHA alveolata var. cirrata, var. nov. 25, Two individuals in 



conjunclion; 26, 27, apices, showing varieties of spines, X 400. Split 



Rock Lake, New Jersey. 



28. EuGLYPHA brachiata, Leidy ; X 400. Lakehurst. 



29. Do. do. var. librata, var. nov. ; X 400. Lakehurst. 



30. Do. do. a, a'. Spine as seen from side and end views of a test; h. End 



view of a spine from Vancouver, British Columbia (after Penard, 39) ; 

 c, c'. Intermediate form of spine. 

 Do. do. var. librata. d, d'. Two views of a spine. Lakehurst. All 

 X 500. 



31. EuGLYPHA cristata var. MAJOR, Wailes ; x400. Lakehurst. 



32, 33. Do. do. var. acicularis, var. nov. Apices and varieties of spines ; 

 X 700. Inishhofin, Ireland. 



34-37. EuGLYPHA CRENULATA, sp. uov. 34, Active individual, X 400 ; 35, body- 

 scale ; 36, aperture-scale ; 37, spine-scale. 0)), Augusta, Georgia. 



38. Do. do. var. minor, var. nov. Body-scale ; X 1000. 



39. EuGLYPHA FiLiFERA var. SPINOSA, var. nov. ; X 320. Broad view of active 



individual. Lakehurst. 



40. Placocvsta SPINOSA var. setigeba, var. nov. ; X 320. 



41. 42. Nebela gracilis var. stomata, var. nov. 41, Broad, and 42, narrow, views 



of test. Seychelles. 



43. Nebela scutellata, sp. nov. ; X 520. Seychelles. 



44. Nebela TROPICA, sp. nov. ; X 520. Seychelles. 



45. QuADHULA symmetrica (Wallich), F. E. Schulze ; x 520. Seychelles. 



