39 



ana, Ktz., but differs in the size of the filaments, which are usually 

 twice the diameter, and in the articulations, which are one-half the 

 length. 



Calothrtx lacucola, n. sp, — C. natans, fuscescens, trichomatis 

 pseudoramosissimis; ramis subpatentibus, non concretis, modice at- 

 tenuatis, apice obtusis, leniter curvatis, elongatis, laxlsslme intricatis; 

 internis sordide aerugineis vel fuscescentibus, homogeneis vel in- 

 distincte articulatis; articulis diametro aequalibus ad duplo triplove 

 brevioribus; vaginis arctissimis achrois yel luteolis; cellulis perdur- 

 antibus globosis, luteis, plerumque singulis, ad pseudoramulorum 

 basim, trichomatibus diametro aequalibus. Diam. max. cum vag., a 

 basis .0006" — .0008" (i5>u — 20/^). Hab. Splitrock Pond, N. J, 



This form appears to be very distinct. It bears a resemblance to 

 Tolypothrix in the mode of branching, but is unlike the plants of that 

 genus in having the filaments moderately attenuated from the base 

 to the apex. 



HAPALOSIPHON, Naeg.— ^. Brebissotiii, Ktz., and H, tenuis- 

 simiis^ Grun. Hab. Ponds at Dennisville, N. J. 



SIROSIPHON, Ktz. — S. coralloides, Ktz. I once received a very 

 small specimen of this plant from the late C. F. Austin, but now dis- 

 cover the same form in abundance on stones along the shores of 

 Green Pond, N. J. When remoistened, it emits a strong fragrance of 

 orange or jessamine-blossoms — a peculiarity not noticed in any other 

 species of this genus, but not unlike that observed in the Chroolepus, 

 found on the Swiss mountains and known as the ** veilchenstein." 



CHLOROPHYLLOPHYCEAE. 

 COELASTRUM, Naeg. — C.sphaericiutty Naeg.,and C microporum^ 

 Naeg. Hab. Ponds, New Jersey and Pennsylvania. 

 PANDORINA, Bory.— 7^. moriim, Bory. 

 PENIUM, Breb. — P, Brebissonii^ Ralfs, and P, polymorphum^ 



Perty. Hab. Ponds, New Jersey. 



CLOSTERIUM, Nitsch.— C decorum, Breb., and C Ralfsii, 



Breb^ Hab. Ponds, Atsion, N. J. 



DOCIDIUM, Breb.—/?. dilatatum, Cleve. 



COSMARIUM, Corda.— C. venustum, Breb.; C, pusillum, Br^b.; 

 C. quadrangtdatum, Hass.; C exiguum, Archer; C. nastitiim, Nordst.; 

 C. elegantissimum^ Lund; C. pseudopyramidatum, Lund; C subspecio- 

 swn, Nordst.; (7. variolatum, Lund- The last four species were coU 

 lected by Capt. J. Donnell Smith in Florida. C. sexatigulare^ Lund. ' 

 New Jersey. C, trachypleurum, Lund. Pennsylvania. C. pycmchon- 

 drum. Nordst., collected by C. G. Pringle, in Vermont. 



CALOCYLINDRUS, DeB.— C. curtus, Breb.; C. Cuairbita, Breb.; 

 C. Palangula, Breb.; C. pseudo-conmtus^ Nordst. Pennsylvania and 



New Jersey. 



EUASTRUM, Ehrb. — E. Intermedium, Cleve. Dennisville, N. J. 



MICRASTERIAS, Ag.—M. Baikyi, Ralfs, and M. Torreyi, 



Bailey. Splitrock Pond, N. J. 



'These two forms were recognized by Prof. Bailey thirty years ago, 

 but have probably not been rediscovered since. The latter species 

 is our largest form in this genus. M, fimbriata, Ralfs, van apiculata, 

 Meneg, and M. papillifera, Breb. Atsion, N. J. 



