r32 



SYSTEMATIC HISTOEY OF THE INFUSORIA. 



base, broadly rounded at etids, smooth. 

 U.S.A. 



C. granatum (Breb.). — Frond minute, 

 somewhat longer than broad; constric- 

 tion linear ; seg-ments broader than long, 

 rajiidly tapering ^ truncato-trianguku ; 

 smooth; s.v. compressed; e.v. elliptic. 

 L. 1-1234"; B. 1-1602". G.B., I., F. 



C. polygomim (Niig. sp.). — Frond mi- 

 nute, about one-third longer than broad, 

 constriction shallow, linear; segments 

 hexagonal, sometimes punctate, lateral 

 margins and ends straight; e.v. elliptic 

 with a broad rounded inflation at each 

 side. = Euastrmn polygonum (Nag.^. G. 



C. Phaseolus (Breb.). — Frond in f.v. 

 about as long as broad, constriction deep, 

 linear; segmetits reniform, smooth; e.v. 

 elliptic, with a slight conical projection at 

 each side. L. 1-787" ; B. 1-833". =K 

 depressum (Nag.) ? G.B., I., F. 



C. Papilio (Menegh.). — " Segments 

 smooth, triangular, with rectangular 

 apex, sides very slightly sinuato-undu- 

 late, lateral angles produced, acute ; e.v. 

 linear with a lobe at middle of each side.^^ 

 Euastrum ? Papilio (Kg.). G., Italy. 



2t Margins of segments crenate or 

 slightly undulate, sm'face not granu- 

 late. 



C. Meneghinii (Breb.). — Frond very 

 minute, rather longer than broad, con- 

 striction linear; segments subquadrate, 

 bicrenate at the sides and ends, smooth ; 

 e.v. elliptic. L. 1-853" to 1-735"; B. 

 1-1250" to 1-1176". = C. bioculatum 

 (Menegh.), Euastrmn bioculatum (Kg.), 

 E. angulosmn (Breb.), E. crenulatum 

 (Nag.). G.B., I., F., G., Italy, U.S.A. 



C. crenatum (Ralfs). — Frond minute, 

 not quite twice as long as broad, con- 

 striction linear ; segments obsoletely 

 quadrate, crenate at the margin, Jlattened 

 at ends, surface punctate; e.v. elli]3tic. 

 Sporangium orbicular, spinous ; spines 

 very short and stout, swollen at base, 

 and di\dded at the apex. L. 1-474" ; 

 B. 1-Q7 8". =Euastru7n? sinuosum (Kg.). 

 G.B., I., F. 



C. undulatum (Corda). — Frond rather 

 larger than last, slightly longer than 

 broad, constriction linear; segments 

 semiorbicular, ends and sides broadly 

 rounded, crenate or minutely undulate 

 at margin; e.v. elliptic. Sporangium 

 orbicular, spinous ; spines elongate, slen- 

 der, swollen at the base and divided at 

 the apex. L. 1-416" ; B. 1-571". (ii. 

 33, spor. 34). = Euasfrum crenulatum, c 

 (Nag.)? G.B., I., F., U.S.A. 



C. Nesgelianum (Breb.). — Frond in f.v. 

 slightly longer than broad, constriction 

 deep, linear ; segments broad at the base, 

 rapidly narroiving upwards, sides ivith 

 several minute sinuations, ends broadly 

 truncate, straight or very slightly undu- 

 late, obscm-ely punctate ; e. v. elliptic, 

 sometimes somewhat inflated at the 

 sides. = Euastrmn (Costnariimi) crenatum 

 (Nag.). F.,G. 



C. tetragonum (Nag. sp.). — Frond in 

 f.v. about twice as long as broad, oblong, 

 constriction linear; segments subquad- 

 rate, somewhat narrowing from the base, 

 sides and end each with three slight 

 sinuations, those of the ends rather 

 smaller, in each half one large central 

 granide ; s.v. segments oval, roimded, 

 constriction shallow. = Euastrum tetra- 

 gonum (Nag.). I., G. 



C. venustum (Breb. sp.). — Frond some- 

 what longer than broad, constriction 

 deep, linear ; segments slightly narrowed 

 upwards, ivith two somewhat deep sinua- 

 tions at the sides, ends broad, truncate, 

 slightly concave at the centre. = Euastrmn 

 venustum (Breb.). F. 



3t Fronds rough on the surface, with 

 pearly granules, which give a denticu- 

 late appearance to the margin. 



C. tetraophthalmum (Kg., Breb.). — 

 Frond about a third longer than broad, 

 constriction deep, linear; segments/o;7«- 

 ing nearly two-thirds of a circle, rough on 

 the surface with sho?'t and broad scattered 

 pearly granules, giving a crenate appear- 

 ance to the margin ; e.v. broadly elliptic. 

 Sporangium orbicular, spinous ; spines 

 swollen at base, finelv oranched. L. 

 1-232" ; B. 1-1326". "^G.B., I., G., F. 



C. Brebissonii (Menegh.). — Frond 

 somewhat longer than broad, constric- 

 tion deep, linear ; segments semiorbicular, 

 rough all over with somewhat elongate- 

 conical scattered pearlv granules ; e. v. 

 eUiptic. L. 1-285"; B. 1-460". = C. mar- 

 garitiferum (Kg.) ? G.B., I. , F., G. 



C. conspersum (Ealfs). — Frond about 

 a third longer than broad, constriction 

 deep, linear; segments quadrilateral, 

 angles roimded, rough all over with de- 

 pressed gTanules aiTanged in lines ; e.v. 

 elliptic. L. 1-162"; B. 1-357". = a 

 Brebissonii (Menegh.).'' G.B., F. 



C. Ungerianum (Nag.). — Frond large, 

 rather longer than broad, constriction 

 deep, linear ; segments much inflated at 

 the base, angles and sides rounded, nar- 

 rowing upwards, ends broadly truncate, 

 rough at the margin, with a few large 



