List of Besmidiese, &c. By J. P. Bisset. 195 



39. C. orbkulatum Kalfs Frequent, 



40. C. Portianum Aicher Common. 



41. C. amcenum Breb Ditto. 



42. C. annulatum Nag. (Gatt. einzell. Alg. 



p. Ill, t. vi. F.) Brantfell, Lindeth, and Easedale. 



43. C. Thwaitesii Ealfs Frequent. 



44. C. quadratum Ealfs Ditto. 



45. C. anceps Lundell (Desm. Suec. p. 48, 



t. iii. fig. 4) Easedale. 



46. C. Holmiense, var. j3 integrum Lundell 



(Desm. Suec. p. 49, t. ii. fig. 20) . . Lindeth. 



47. C. pm-vulum Breb Blea Tarn, Easedale, and Angle Tarn. 



48. C. cucurhita Breb Frequent. 



49. C. turgidum Breb Lindeth. 



50. C. de Baryi Archer Ditto. 



51. C. cucumis Corda Common. 



52. C. Ralfsii Bre'b Easedale. 



53. C. cyclicum Lundell (Desm. Suec. 



p. 35, t. iii. fig. 6 c?) Angle Tarn. 



ABTHB0DESMU8 Ehrb. 



1. A. convergens Ehrb Frequent. 



2. A. Incus Breb Ditto. 



3. A. octocornis Ehrb Ditto. 



STAVBA8TBUM Meyen. 



1. S. muticum Breb Common. 



2. S. orUculare Ehrb Ditto. 



3. S. hrevispina Bre'b Brantfell and Lindeth. 



4. S. mucronatum Kalfs Brantfell. 



5. S. dejectum Breb Common. 



6. S. apiculatum Breb Brantfell. 



7. S. cuspidatum Breb Brantfell, Lindeth, and Claife Heights. 



8. *S'. Dickiei Kalfs Brantfell, Claife Heights, and Ease- 



dale. 



9. S. pterosporum Lundell (Desm. Suec. 



p. 60, t. iii. fig. 29) Angle Tarn and Low Tarn. 



10. S. O'Mearii Archer Brantfell. 



11. S. avicula Breb Ditto. 



12. 8. hrachiatum Kalfs Claife Heights. 



13. 8. Iceve Kalfs Claife Heights, Easedale, and Angle 



Tarn. 



14. 8. levispinum Bisset, n. s Low Tarn. 



Fig. 5. — a, front view ; b, end view. Frond as figured. Length, 28-30 /x ; 

 breadth, 32-35 /a ; breadth of constriction, 9 fx. First found in 1882 in 

 Arran, Scotland. 



15. 8. tricome "Breh Brantfell and Lindeth. 



16. 8. asperum Breb Brantfell, Lindeth, and Easedale. 



17. 8. KjellmaniWille (Fersk. Nova. Semi. 



p. 50, t. xiii. figs. 50-53) . . . . Blea Tarn, Easedale, and Angle Tarn. 



18. 8. Mrsutum Ehrb Brantfell, Blea Tarn, and Easedale. 



19. 8. Pringsheimii Eeinsch (Die Algen- 



flora, p. 172, t. x. fig. 4) Lindeth. 



20. 8. alternans Bre'b . . Brantfell and Claife Heights. 



21. 8. margaritaceum Ehrb Angle Tarn and Low Tarn. 



22. 8. BreUssonii Archer Lindeth and Low Tarn. 



23. 8. teliferum Kalfs Frequent. 



24. 8. nitidum Archer (Dublin Nat. Hist. 



Rev. p. 3, pi. i. figs. 3, 4) . . . . Lindeth. 



