584 Protococcoidefp, Palmellaceae, Pediastnim. 



intense viridibus, nonnuaqiiam in colorern caf;ruleum niutatis, 10- 

 32-celluIaribus, dispositione celliilaruin l-|-5-}-10 v. l-fG-flO-f-15 v. 

 6+10-f-16; cellulis periphericis ad medium hilobis, lobis rectis, iii 

 cornua truncata, emarginato-bidentata productis; cellulis contraii- 

 bus 4-5-angularibus, iri antica parte plerumque leniter repandis. 

 Ildh. in Britannia (Ralfs). — Var. ornatum Nordst. I)o Algis 

 et Characeis Sandwicensibus p. 8, t. I, f, 7, Lagerh. Bidrag till 

 Sveriges Algflora p. 71: coinobiis 10-32-celluIaribus, cellularum 

 dispositione tum 1+5-f-lO v. 1+6+0, tuin l+O-f-10+15 v. {l+5)+ll-|- 

 15; cellularum periphericarum lobis sensim in cornua brevissima 

 atteiniatis; membrana cellularum luculenter granulata. In paludibus 

 montis «Mauna Kea» Sandvicensis (S. BERGdREN sec. Nordstrdt) 

 et ad «Upsala» Suecire (Lageriieim); iii Belgio (De-Wildeman). 

 — Fortasse, ex ipso Nordstedt, tantuni sistit l'cdias(rum granu- 

 lalum forma neodamense A. Br. Alg. unicell. p. 91. 



18. Pediastrum constrictum Ilassall Brit. Alg. p. 301, t. 80, f. 15, ii«r 

 10, Kuetz. Spec. p. 192, n. 7, Rabenh. Fl. Eur. Algar. III, p. 77, 

 Cooko Brit. Freshw. Alg. p. 42, t. 17, f. 2, Pedias/rum ellipti- 

 cum Ralfs Brit. Desmid. p. 188, n. 11, t. XXXI, f. 10 d., excl. 

 synonymis et var. /3. — Cronobio orbiculari vel suborbiculari, laete 

 viridi, continuo, levi?, e cellulis 10 (m-5-i-IO) v. 32 (l+5-fI0fl5) 

 formato; cellulis periphericis irregulariter bilobis, sinu angusto, 

 lobis inrequalibus, basi plerumque constrictis, in cornua subcrassa 

 obtusa productis, centralibus polygoniis, in antica parte repandis. 

 ITah. in aquis stagnantibus in Britannia (FIassall). 



Subfjimilia tertia Pseudocoenobieae Kirchn. 



Pscudocflcnobicce Kirchn. [1877] Alg. Scliles. p. 98, llansff. [1888] Prodr. p. IIC. 



Sciadiece auct. nonnull. vix Gobi. 



Sciadiacece Borzi [188.5] iii Martol Contrib. alprol. ital. p. 11 p. m. p. 



Cellula} singuhr; in familiam coenobiiformem consociatfe ex eadem 

 et singula goneratione haud ortne. 



Mtiltiplicatio zoogonidiis e divisione simultanea plasmatis cellu- 

 larum ortis. 



Conspectus gonerum ') 



1. Coloniix; cnju.sciimqiie gcncrationis collulas conformes, dirccte zoogoni- 

 digenas pra)bentcs. 



1) Oenus Cosmocladiwn nreb. Mischncoccn Naeg. qnndammodo simile, in- 

 ter Conju/.afas, suadentibus fl. Nordstedt ct Dan^cnrd, disposui. 



