OF ARTS AND SCIENCES. 335 



lentis obtusissimis ; articulis inferioribus diametro 2 - 3-plo supremis 

 multoties longioribus. 



Semiavinia Bay, Arctic Asia. (Also at Whalefish Islands, Davis's 

 Straits, and in the Arctic Ocean, lat. 76°, Dr. Lyall.) 



50. RivuLARiA orACA: fronde (minori) vesiculosa difformi rigida 

 opaca nigro-viridi ; filis moniliformibus laxiusculis. 

 Loo Choo Islands. 



51.-Ltngbta ATROVIRENS : cosspitibus longe fluitantibus atrovi- 

 rentibus comosis ; filis crassiusculis liberis glaucis densissime striatis ; 

 vagina crassa subopaca scepe rugosa. 



Loo Choo Islands. 



52. Lyngbya effusa : ca3spite effusa nigro-viridi ; filis semiunciali- 

 bus tenuibus intricatis flexuosis glaucis ; vagina angusta loevi. 



Loo Choo Islands. An obscure production. 



53. Lyngbya atropurpurea : coespite atropurpurea comosa ; filis 

 tenuissimis fluitantibus strictiusculis violaceis, striis inconspicuis. (Harv. 

 Alg. Ins. Amic. no. 118.) 



Bonin Islands ; on corals. (Also at the Friendly Islands.) 



54. Chroolepus Chinensis : majuscula, rupestris ; filis in ctespite 

 (2-unc.) tomentosa luteo-viridi siccitate pallide glaucescenti inter- 

 textis decumbentibus vage ramosis ; ramis horizontaliter patentibus 

 recurvis sa^pius secundis ; ramulis paucis multisve patentibus ; sporidiis 

 lateralibus sparsis ; articulis diametro duplo longioribus. 



Hong Kong ; on damp rocks in the mountains. 



Four Iiundred and seventy-lirst meeting. 



November 9, 1859. — Stated Meeting. 



The President in the chair. 



The Corresponding Secretary read several letters relative to 

 the exchanges of the Academy. 



He also read a " Note upon the Allanite found at East 

 Bradford, Pennsylvania, by William Sharswood, A. M." 



Professor Gabriel Valentin, of Berne, Switzerland, was 

 elected a Foreign Honorary Member in Class II. Section 2 

 (Botany). 



