1170 ConjuguUe, Desmidiaceie, Staurastrum. 



94. Staurastrum bullosum Benn. in Journ. Royal Micr. Soc. 1886, 2S22 

 1». 11, t. II, i". 18-'iO. — Mediocre; semicellulis oUipticis, diametro 

 dupio longioribus, e fronte visis triaugularibus, siuu angusto, pro- 

 niinentiis lieniispluericis, distinctissimis prajditis; semicellulis spinis 

 liyalinis, ajquidistantibus, simplicibus, subulatis instructis; membra- 

 na uniformiter verrucosa. 



Ifab. in rivulis «Longhrigg» Britannia? (A. W, Bennett). — 

 Dim. cell. 85t;38; lat. isthm. 35 p.. 



95. Staurastrum rugulosum Brcb. in Ralfs Brit. Desm. p. 214, t. 2823 

 XXXV, f. 19, Rabenh. Alg. sub n. 1407, Fl. Eur. Algar. 111, p. 

 208, Wolle Desm. U. S. p. 127, t. 41, f. 41-42, Euasit-um n. 9. 

 Bailey in Amer. Joiirn. 1841, p. 296, t. 1, f. 9. — Mediocre, 35-38 



u. diam., granulatum ; semicellulis ellipticis, late rotundatis, rectis, 

 lateribus rotundatis, a vertice triangularibus, angulis late rotun- 

 datis, lateribus rectis vel levissime retusis. 



Hab.m fodinis turfosis prope (( Dretschen, Neudamm», Gerraa- 

 uia^ (Rabenhorst) , pr. «Falaise» Gallia^ (Brebisson), ad «New 

 York, Rhode Island, New Jersey, Pennsylvania» Americte borea- 

 lis (Bailey, Wolle). 



96. Staurastrum scabrum Brcb. in Ralfs Brit. Desm. p. 214, t. XXXV, 2824 

 f. 20, Rabenh. Fl. Eur. Algar. 111, p. 217, Wolle Desm. U. S. p. 

 130, t. 41, f. 29-30, — Semicellulis forma subirreguhiribus, ellipticis, 

 latere ventrali pauUum tumidis, dorso subplanis, scabris, e vertice 

 visis trianguhiribus, spinis rainutis emarginatis asperulis, lateribus 

 rectis, angulis obtusis. 



Ilab. in stagnis Gallise (Brebisson) et ia Pennsylvania et New 

 Jersey America^ borealis (Wolle). — Diam. cell. 25-28 [i. 



97. Staurastrum botrophilum Wolle Desm. U. S. p. 131, t. 42, f. 11-13 2S25 

 et in Hedwigia 1882 p. 78. — Paullulum longius quam latius, di- 

 stincte granuh^tum, granulis secus series concentricas dispositis; 

 semicellulis e fronte conspectis subtriangularibus, apicibus late 

 truncatis, lateribus modice convexis vel subrectis, convergentibus, 

 angulis basalibus rotundatis ; e vertice visis triangularibus, angu- 



lis rotundatis, lateribus leviter convexis vel rectis; e latere visis 

 subellipticis, 



Hab. in paludosis pr. ((Bethlehem » in Pennsylvania Americae 

 l)orealis (Wolle). — E fronte conspectum, qunsi Cosmarium re- 

 fort. — Diam. ccll. 36-38 a. 



98. Staurastrum Arnellii Boldt Sibir. Chloroph. p, 112, t. 5, f. 21, — ^ 

 Parvum, diametro circiter quinta parte longius, profunde constri- 



