68 DICTYOTACEAE 
Family DICTYOTACEAE 
SPATOGLOSSUM Kiitz. p.p. Linnaea 17: 97. 1843; Phyc. 
Сеп. 339. 1843. J. Ag. Till Alg. Syst. 2: тїт. 
1880; Anal. Аш. Cont. г: 45. 
1894 
Spatoglossum crispatum sp. nov. 
Stupose for 2-4 cm. at base, mostly т 5-25 cm. long, 3—8 times 
dichotomous or subdichotomous or somewhat laterally branched 
at the subcostate base, often with short rigid crisped and congested 
basal branches; main segments mostly linear, 10-25 mm. broad, 
usually obtuse, rather coriaceous and mostly 250—420 u thick 
when fresh, papyraceous or subcoriaceous when dry, the margins, 
at least in the lower half, crenulate-crisped, rather rigid and 
brownish, becoming subentire ог minutely crenulate above; 
interior or medullary stratum mostly 3-6 cells thick, the cells 30— 
210 џ in longer diameter in a transverse section; basal or subbasal 
costa showing in a cross section 6—10 series of smaller subquadrate 
cells in regular vertical rows bordering the medulla on either face; 
surface of thallus not zonate and scarcely areolate, the cortical 
cells. rather obscurely grouped in irregularly rhombic areas 
bounded by colorless intercellular lines, the cells almost homo- 
geneous in form and size, subquadrate or oblong and 13-40 u in 
maximum diameter in suríace view, columnar or rectangular- 
as high as broad; tetrasporangia ovoid with longest liameter 
perpendicular to the surface, 70-125 и high, 42-96 іп огеайевс 
width. [PLATE 13, FIGURES 1-4; PLATE 26.) 
Islands of Lobos de Afuera, Маг. 27, 1907, Coker 145 p.p. 
(type); Lobos de Tierra, Apr. 2, 1907, Coker 150 ЖА 
Spatoglossum crispatum evidently belongs in the section of the 
genus that includes 5. Schroederi (Mert.) Kiitz. (p.p.) and 5. 
Areschougii J. Ag., but appears to differ from both of these species 
in the firmer more rigid thallus, the crisped-crenulate instead of 
plane dentate or proliferous margins, the more costate base, the 
medullary stratum mostly 3-6 instead of 2 or 3 cells thick, the 
smaller more homomorphous cortical cells, the marked vertical 
elongation of the cortical cells and sporangia, etc. The striae of 
cortical cells that J. Agardh mentions as characteristic of the 
S. Schroederi section appear to be lines of narrower darker cells 
such as bound his “fenestrae” in the surface of certain species of _ 
