136 ive MOE DOGONITACEAE 
150b. Form insigne (Nordstedt) Hirn. 
(Pl. L, figs. 482 and 483.) 
1900, p. 222, Pl. XX XVII, fig. 227; Oe. wolleanum Wittr. var. insigne Nordst. 
in Wittr. and Nordst. Alg. Exs. No. 207, 1879. 
Stouter; ribs on the oogonium and oospore 35-40; oogonium 1-10; 
androsporangium to 10-seriate; antheridium 1-4; vegetative cell 18-36 x 
53-250u; suffultory cell 57-66 100—-150u; oogonium 67-80 78-92; 
oospore 64-76 X74—90y; androsporangium 19-30 18-304; dwarf male 
stipe 18-24 54-68yu; antheridium 12-14 10-12uy. 
United States: New Jersey; Sweden. 
This species is characterized by regular, longitudinal ribs 
on the outer layer of the oospore wall. It differs from Oe. 
cyathigerum (No. 149) in this respect and also in having a 
larger number of ribs. Var. concinnum has crenulate ribs, 
and f. imsigne differs in its slightly larger size and in the 
larger number of ribs on the oospore. 
151. Oe. concatenatum (Hassall) Wittrock. 
(Pl. LU, fig. 494.) 
Vesiculifera concatenata Hass. 1845, p. 201, Pl. 51,- fig. 3; Oe. cencatenatum 
Wittr. 1874, p. 25; Oe. apophysatum Al. Br. im Pringsh. 1858, p. 71, Pl. 5, fig. 9; 
Oe. apophysatum Pringsh. in Wittr. 1872a, p. 22; Oe. concatenatum (Hass.) Wittr. 
var. lagenarioides Filarszky 1899, p. 65, Pl. 3; Hirn 1900, p. 228, Pl. XX XVIII, 
fig. 230; Heering 1914, p. 180, fig. 245; Tiffany 1926, p. 104, Pl. VIII, fig. 92. 
Dioecious, nannandrous, gynandrosporous; oogonium 1-6, subovoid 
or quadrangular-ellipsoid, pore superior; oospore of same form as 
oogonium, nearly filling it, outer layer of spore wall smooth, middle 
layer with pits, more or less distinctly arranged in 30-35 longitudinal 
series, inner wall smooth; suffultory cell swollen; androsporangium 
1-4; basal cell elongate; terminal cell obtuse; dwarf male curved, on’ 
suffultory cell; antheridium exterior, 1-4; vegetative cell 25-40 X 75-400, ; 
suffultory cell 50-6288-155u; oogonium 63-83 X76-105u; oospore 
60-75 X 67-954; androsporangium 25-28 xX 15-364; dwarf male stipe 
17-25 X 50-75u; antheridium 13-15 < 12-25u. 
United States: Illinois, Iowa, Massachusetts, New Jersey, 
Pennsylvania, New York, Michigan; Austria, England, Fin- 
land, Germany, Spain, Hungary, Sweden, Denmark; Alaska; 
British Columbia. 
15la. Form hutchinsiz (Wittrock) Hirn. 
(Pl. LII, fig. 495.) 
1900, p. 225, Pl. XXXVIII, fig. 231; Oe. hutchinsie Wittr. 1874, p. 42; Heering 
1914, p. 180; Tiffany 1926, p. 104. 
Form a little smaller, oospore more nearly globose, the pits of the 
middle layer of spore wall not arranged in evident longitudinal series; 
vegetative cells 26-385X75-210u; suffultory cell 37-50X65-200p; 
oogonium 52-75 X67—-95u; oospore 50-73 X 55-77. 
United States: Iowa; England, France, Spain. 
