OF ARTS AND SCIENCES. 185 



Florescentia dioica : flores masc. numerosi. Caulis arete repens, de- 

 foliatus ; rami plus minus resupinati, ramulis microphyllis parce 

 breviter subpinnati. Folia ovato- oblongove-lanceolata, Isevia, puncti- 

 formi-areolata. Habitatio arborca. Habitus perichsetium foliorumque 

 areolatio Lasice ; peristomium calyptraque Leskece. 



" 34. A. Californica : monoica ; ca3spitibus viridibus extensis bisex- 

 ualibus ; caule arete repente nudo radieiformi radiculoso ramos 2-3- 

 uneiales compressiuseulos deorsum direetos modice resupinatos ramu- 

 lis brevibus mierophyllis paree subpinnatos paraphyllisque minutis 

 multiformibus instructos edente ; foliis laxiuseule imbrieatis oblongo- 

 lanceolatis ereeto-patentibus vel e basi erecta patenti-divergentibus 

 concaviusculis margine anguste reflexis apiee plana indistinete serrula- 

 tis vix semi-costatis laevibus, illis ramulorum minoribus gracilioribus, 

 cellulis minutulis rhombeo-rotundatis chlorophyllosis seriatis, mediis 

 basin versus oblongis subpellucidis, alaribus quadratis obscuris ; eap- 

 sula oblongo-cylindracea exannulata breviter pedieellata e perichsetio 

 subimmerso graeili elongato exserta rostrato-opereulata ; vaginula 

 longissime orthotricha ; calyptra cuculliformi angusta ad | capsulse 

 deseendente glaberrima ; perist. dentibus lineali-laneeolatis remotius 

 prominenter trabeculatis inferne flavescentibus striolatis superne griseis 

 punctulato-seabris linea divisuriali conspicua notatis, ciliis fere sequi- 

 longis subuliformibus nodoso-articulatis scaberulis basi membrana an- 

 gusta plieata transversim oblongo-areolata connexis ; periehcEtialibus 

 vaginantibus, superioribus filiformi-aeuminatis pedieellum sequantibus : 

 fio. masc. gemmiformibus valde manifestis tota caulis ramorumque 

 longitudine utrinque crebre dispositis ; antheridiis 4-6 paraphysatis. 

 — Neckera Californica, Hook, ct Am. ; C. Mull. Sy7i. Muse. Frond. 

 2. p. 117. — Hab. California; entrees." 



George Livermore was elected a Fellow in the Section of 

 Philology and Archaeology. 



Professor Horsford read a joint communication by Professor 

 Frederick Wiihler of Gottingen and John Dean, on Tellurme- 

 thyle. 



Professor Agassiz made a communication on the alternate 

 generation of Oceania tubulosa and Thaumantias, showing 

 that they arise from polyp-like stalks, known as Syncoryne 

 and Campanularia, and mentioning some interesting partic- 



voL. III. 24 



