THE DIATOMACE^ OF GANSO HARBOUR, NOVA SCOTIA 



57 



SESSIONAL PAPER No. 22a 



31. Eunotia (?)., 21 x 14, striae about 15. One specimen. 



32. Synedra affinis (Kg.), 'TS x (3.5:4:3.5) to 90 x 3.5, Striae 13. Not uncom- 

 mon in Chorda collection. 



33. Synedra Gallionii, Ehr., 240 x (6:7:6) to 300 x (7:8:7). Strise 10 or 11. 

 Kather common in Chorda and also Zostera collections. 



34. Synedra crystallina (Lyngb.) Kg., 375 x (9:8:11:8:9) to 600 x (10:8:13:8: 

 10). Striae 15 +. Common. 



35. Synedra fulgens (Kg.) W. S., 240 x (9:7:10:7:9) to 340 x (10:8:12:8:10). 

 Striae 12 to 14 or more. Karsten's S. crystallma does not appear to agree with Moller'a 

 type nor with the descriptions and figures in Van Heurck and Wolle, for instance. 

 Van Heurck's S. fulgens is practically a reduced S. crystallina. Many of the speci- 

 mens in these collections where S. fulgens is very common, while retaining the gen- 

 eral shape of the larger species, have the striation generally coarser instead of finer. At 

 least this appears from a large number of estimates if not exact measurements which 

 I noted. 



36. Synedra undulata (Bailey) Greg. 550 x (7:4:9:4:7). Striae about 12. Only 

 one specimen of this splendid species has been noted, and it is in close agreement 

 with the type. 



37. Homoeocladia capitata H. L. S. 22 x 3. Striae 12 ±. From its smallnesa 



the determination of this species may be considered doubtful. 



38. Eragillaria hyalina (Kg.) Grun. (?). 



39. Eragillaria Pacifica, Grun. 25 x 6. Striae 15. (?). 



40. Eragillaria amphicephala Ehr. 45 x 11. Striae not visible in the 1-12. 

 Doubtful, as only one specimen was noted. 



41. Licmphora Lyngbyei (Kg.) Grun. 40 x (12:3) to 60 x (24:3) to 80 x 

 (8:2). Striae about 15 or less. This is the species which next to Striatella unipuncta 

 is the most abundant in the Chorda collection. It is possible that the variations of 

 proportion observed may be too great for combination into one species. A separation 

 of the species, if there are more than one, requires more investigation of the plants 

 in their habitat. 



42. Licmophora (?). Somewhat ovate-fan shaped like Podosphenia 



Baileyi of Edwards. Roundish but drawai at the base into a cuneate stem. Height 

 and breadth varying from 40 x 25 to 50 x 28 to 54 x 33 to 66 x 47 to 67 x 45. A 

 central line, sometimes doubled runs like the midrib of a leaf through the delicate 

 frond which generally shows under the 1-12 oil immersion, a faint striation at right 

 angles to the midrib, which striation becomes fainter as it ascends until it becomes 

 invisible before the middle of the frond is reached. It does not appear to be strongly 

 silicified, for prolonged boiling in nitric acid decomposes it. When heated on the 

 cover glass before being mounted in balsam it is more or less distorted. Lack of time 

 has prevented my complete study of the form; so that I can merely say it may be a 

 diatom, and it may not. 



43. Grammatophora marina (Lyngb.) Kg. 30 x 10 to 40 x 15 to 42 x 9. Striae 

 often not visible in the l-12th. Common. 



44. Grammatophora Oceanica Ehr. 54 x 9 to 70 x 15 to 75 x 12. Striae in- 

 visible. Not uncommon. Looks often like Or. stricta, Ehr. 



45. Grammatophora (?) 30 x 15 to 45 x 16. Strise: 12 to 13. Like 



a variety of Gr. angulosa Ehr., or of Gr. serpentina Ehr. with the serpentine line 

 shortened to three undulations — a Greek e depending from a stemmed hook. 



46. Striatella unipuncta Ag. Valves 60 x 18 to 80 x 20 to 87 x 24. Groups 

 78 to 107 microns across. The most abundant diatom, especially in the Chorda col- 

 lection. 



47. Rhabdonema arcuatum Kg. Valves 30 x 14 to 57 x 30 to 70 x 21. Groups 

 across valves 54 to 73 to 105. Striae 6 to 8. Common. 



48. Nitzschia punctata (W.S.) Grun., 44 x 18 to 50 x 18. Rows of pearls 8 to 

 10 microns. "With the N. corymhosa collection. 



