OF ARTS AND SCIENCES. 333 



attenuata nunc apice prolifera nunc furcata; cystocarpiis numero- 

 sissimis. 



Japan {Dr. Bahington) : Ilakodadi and Straits of Sangar. 



37. Endocladia complanata : fronde ex stipite tereti mox com- 

 pressa tunc complanata decomposite dichotoma, laciniis lato-linearibus 

 vel cuneatis ex margine et disco ramulos spinosos emittentibus margine 

 fimbriatis. 



Simoda, Japan ; on rocks near high-water mark. 



38. Caulerpa Amicorum : surculo crassiusculo glabro ; ramis 

 erectis basi nudis vage decomposite ramosis ramulis virgatis, ramentis 

 bi-trifariis subulatis incurvis acutis, inferioribus brevissimis conicis, 

 (Harv. Alg. Ins. Amic. no. 62.) 



Ousima, north of the proper Loo Choo Islands. (Friendly Islands, 

 of larger size.) 



39. Caulerpa brachtpus : surculo glabro ; phyllodiis subses- 

 silibus elliptico-oblongis basi et apice obtusissimis planis enervibus 

 integerrimis nunc hie illic constrictis vel proliferis. 



Tanegasima, Japan. 



HALICORYNE, Harv. (Nov. Gen.) 



Frons calcareo-incrustata, claviformis, simplex, ex axi tubuliformi 

 monosiphonio continuo ramulisque verticillatis saccatis unicellulosis 

 demum sporiferis constituta. Sporae ex materia viridi ramulorum 

 vetustorum formatog, numerosse, sphtericse, nucleo denso viridi in peri- 

 dermide hyalino membranaceo incluso. — Alga habitu Dasyclado prox- 

 ima, fructu substantiaque diversa. 



40. Halicortnne Wrightii. — Loo Choo Islands ; in muddy pools, 

 at low tide. Thinly incrusted with carbonate of lime. 



41. Valonia Forbesii : cellula maxima pyriformi incurva basi in 

 stipite infundibuliformi attenuata. 



Loo Choo Islands. (Also Ceylon.) 



42. Enteromorpha ciERULESCENS : fronde ca3rulescente mem- 

 branacea longissime tubulosa vage ramosa, ramis filiformibus attenuatis 

 simiplicibus, ramulis sparsis setaceis. 



Loo Choo Islands ; in stagnant pools of fresh water. 



43. Cladophora "Wrightiana : maxima, ultra setacea ; fronde 

 stipitata rigide membranacea I'obusta trichotoma, ramis bis terve divisis 



