I'llKlACK. M, 



nil. .*!,, ,<il,.*, I.y\<;ii HAKV Nrr. lUr. Am. 3. 50. Providence to Newport. 

 k'nti riiK-j l,n co m/ , i, *,... \ ||.\i:\ NIT l!,.r. Am. a. ."iii. Southern Khode Island. 

 EnicroiHurjihu tlatltrata, (JuKV.-H.VKV. Ner. i;..r. Am. 3. 56. Newport. 

 i lati.-i*iuni, L.-lI.Miv. Nrr. l!<>r Am. '.', ;">'.>. I'rviilr; 

 lii,-tin;i, I, -Il.uiv. NIT. IJi.r. Am :! r.n. I'ruviili -nee. 



la< MMM, I'M AI \ II M:V .N.-r. Bor. Am. 3. 61. T. perforata, BAILEY Mas. Providence. 



-/xil-lt lulirnil, AI.. 1'rovidrnri-. 



Batrac/u>!<i><:r>iiuiH fiui-lirrrimiint, HAS.S. 1'rnviili'iicc. 



iiim muiiili/nriiK-, lli'in -ll.\u\ N.T. linr. Am. 3. 63. Providence. 

 Checti>lt>jra eitilu-n foliu, Ati.-llAiiv. NIT 15nr. Am. .'!. (','.. I'rovidcncr 

 ijlunn-riilu, Aii.-ll.\u\. Nrr. Bor. Am. 3. 72. Providence. 



miiuttum, Ki r/. Provideiu-f. 



i- I. -ll.\uv. Nor. Bor. Am. 3. 74. Newport. 



Cliiiliij,li<,rn ijl , GBIFF.-HABV. Ner. Bor. Am. 3. 77. Ilhode Island. 



Cla<l<>i>lioni rrfrnrta, IloTii.-IlAKV. Ner. Bor. Am. 3. 79. Soutlicrn Ithodc Island. 

 <.'ltt'l"j'h<>ni Itii'luli'hiana, Aa.-HARV. Ner. Bor. Am. 3. 80. Providence. 

 Cladojihora ijriKilo, (JKUK.-HAKV. Ner. Bor. Am. 3. 81. Little Compton. 

 ' 'I'hora fracta, HARV. Ner. Bor. Am. 3. 82. Rhode Island, Bailey. 

 Chsetomorpha xren, Du.i.w.-IlAR. Xcr. Bor. Am. 3. 86. Newport, etc. 



nnrjiha Olni-iji, ILvuv. Ner. Bor. Am. 3. 86. Little Compton. 

 Chtctomoriiha 1'nnjiiirlirulata, HARV. Ner. Bor. Am. 3. 86. Little Compton. 

 rnr. rru.^.-i',r. HAKV. Ner. Bor. Am. 3. 86. Little Compton. 



HiorjiliH sutoria, BEIIK.-HAKV. Ner. Bor. Am. 3.87. Newport. 



malfnrmatum, HASS. 1. 147. Providence. 

 /" .-eforme, HASS. 1. 147. Providence. 



X>j'jn<-\nii Tliii-iiii,-sii, OLNEY, n. s. NearZ. subventricosum, Providence. 

 Xyijntmn I'lixjnlnm, HASH. 1. 151. Providence. 

 Z'/'jnrma striata, OLNEY, n. s. " Cells evidently striated," Tliwaites. Providence. 



''iriilea bicornis t ILvss. 1. 162. Providence. 

 Tyndaridea insignis ? UASS. 1.163. Providence. 

 Ifesocarjnis /xzriru/us, HASS. 1. 1C9. Providence. 

 M">i(jeotia yenuflexa, Ao.-IlASS. 1. 173. Providence. 

 Vesiculif era concatenates, HASS. 1. 201. Providence. 



ulifera teqttalis, HASS. 1. 205. Providence. 

 Vesiculifera bombycina, HASS. 1. 208. Providence. 

 Vesiculiftra Candollii, HASS. 1. 208. Providence. 

 Jlnlbochtste Thwaittgii,Oi.tiiT, n. s. Providence. 

 Lynybya majuscula, HARV. Bor. Am. 3. 101. Providence. 

 Spheeroplea virescens, BERK. Providence. 

 Sphteroplea pvnctalig, BERK. Providence. 

 Tolypothrix dittorta, KuTZ.-IlASS. 1. 240. 



Calothrix confervicola, Ao -HARV. Ner. Bor. Am. 3. 105. Providence. 

 Calolhrix scopulorum, AO.-HARV. Ner. Bor. Am. 3. 105. Providence. 

 Uyalotheca dissiliens, BREV.-RALFB. DCS. 51. (Qloeoprium.) Providence. 

 Hijdlotheca mucosa, EnRn.-IlALFS. DCS. 53. Providence. 

 Ih'lymoprium Orevillii, KiJTZ.-RALrs. PCS. 61. Rhode Island, Bailey. 

 Didymoprium Borreri, RAI.FS. DCS. 58. Rhode Island, Bailey. 

 Desmidium Sicartzii, AO.-RALFS. DCS. 61. Throuphont United States, Bailey. 

 Aptogonum Baileyi, RALFS DCS -209. Worden's Pond, Rho<le Island, Bailey. 

 Micrcuterias rolata, RALFS. DCS. 71. Providence. 

 Micrasteriat radiosa, Ao.-RAi.F8. DCS. 72. Maine to Virpinia, Bailey. 

 Mii-rasterias furcala, RAI.FS. DCS. 73. Worden's Pond, Rhode Island, Bailey. 



'astering Crur-Melil>-n>si*, RAI.FS. Des. 73. Maine to Virprinin, Bailey. 

 ificraisleriaslrnncata, BREB.-UAI.FS. DCS. 75. United States, Bailey. 



