CEPHALOSIPHON. 



[ 152 ] 



CERATAULUS. 



ment-cells, and the cutaneous connective 

 tissue are interesting structures. 



CEPHALOS'IPHON. A doubtful ge- 

 nus of Rotatoria. 



C. limnias. On Ceratophyllum. 

 BIBL. Pritchard, In/us, p. 070 ; Hudson, 

 M. M. Jn. 1875, xiv. p. 105. 



CEPHALOTHAM'NIUM, Stein. A 

 genus of Flagellate Infusoria. 



Char. Those of Anthophysa, but the 

 pedicle stiff, hyaline, and homogeneous; 

 filaments two. 



C. ccespitosa. Pedicle short ; attached to 

 Cyclops. C. cuneatum, pedicle long ; also 

 on Cyclops. 



BIBL. Kent, Inf. p. 272. 

 CEPHALOT'RICHUM, Fr. A genus 

 of Dematiei (Hyphomycetous Fungi). 



C. curium is an extremely minute plant 

 growing upon the leaves of Sedges ; with 

 scattered, short, brown, erect filaments, 

 bearing somewhat globular heads composed 

 of tufts of forked or ternate branches, with 

 one or two short acute branchlets, slightly 

 scabrous, bearing smooth spores. 



BIBL. Berkeley, Ann. N. H. vi. p. 432, 

 pi. 12. fig. 13; Corda, Ic. Fung. i. pi. 5. 

 figs. 253-4. 



CE'PHEUS, Koch. A genus of Oribatea 

 (Acarina). 



Char. Cephalothorax with lamellar ap- 

 pendages ; tectum attached to cephalotho- 

 rax by its base only ; claws 3, alike. 

 C. vulgaris. Common near Paris. 

 BIBL. Nicolet, Oribatea (Monograph) ; 

 Murray, EC. Entom. 221 ; Michael, Tr. Mic. 

 Soc. 1880, 177. 



CERAM'BYX, Linn. A genus of 

 Pseudotetramerous Longicorn Coleoptera. 



C. (Astynomus) cfdilis (fig. 307). Found 

 on old timber. 



CERAMIA'CE^E. A family of Flori- 

 deous Algae. Rose-red or purple sea-weeds, 

 one freshwater, with a filiform frond, con- 

 sisting of an articulated, branching filament, 

 composed of a single string of cells, some- 

 times coated with a stratum of small cells. 

 Fructification: \.favellce; berry-like recep- 

 tacles, with a membranous coat, containing 

 numerous angular spores; 2. tetraspores, 

 attached to the ramuli or more or less im- 

 mersed in the substance of the branches, 

 scattered; 3. antheridia, produced in the 

 same situations as the spores. British 

 genera : 



Ptilota. Frond compressed, inarticulate, 

 distichous, pectinate-pinnate. Favellcs pe- 

 dunculate, involucrate. 



Microcladia. Frond filiform, inarticulate, 

 dichotomous. Favellcs sessile, involucrate. 

 Ceramium. Frond filiform, articulate, 

 dichotomous; the joints opaque. Favellce 

 sessile, mostly involucrate. Tetraspores 

 mostly immersed. 



Spi/ridia. Frond filiform, inarticulate; 

 the branches clothed with minute setiform, 

 articulated ramelli. Favellcs pedunculate, 

 involucrate. Tetraspores sessile on the 

 ramelli. 



Grijfithsia. Frond articulated, dichoto- 

 mous, or clothed with whorled, dichoto- 

 mous ramelli, rose-red. Favellcs involucrate, 

 sessile or pedunculate. Tetraspores sessile, 

 on whorled ramelli. 



Wrangelia. Frond articulated, pinnate. 

 Favellcs terminal, involucrate, containing 

 tufts of pear-shaped spores. Tetraspores 

 sessile, scattered on the ramelli. 



Seirospora. Frond articulated. Tetra- 

 spores arranged in terminal, moniliform 

 strings. 



Cattithamnion. Frond, at least the 

 branches and ramuli, articulated, mostly 

 pinnate. Favellcs terminal or lateral, sessile, 

 without involucre (except 

 in C. Turneri). Tetraspores JTJO-. 114. 

 sessile or pedicellate, scat- 

 tered. 



Chantransia. Fresh- 

 water ; fronds filamentous, 

 articulate, branched, cells 

 in single series ; favellcs in 

 terminal corymbs. 



BIBL. Harvey, Man. Br. 

 Alga ; Cramer, Ceram. 

 1803; Sachs, Bot. p. 393. 

 See also the Genera. 



CERA'MIUM, Roth. 

 A genus of Ceramiacess Ceramium Des- 

 (Florideous Algae), contain- longchampsii. 



ing a number of species, Fragment of a frond 



mostly growing between 



tide-marks, of which C. cih- 



atum is noted as a beautiful 



object under a low magnify- metera. 



ing power. The tetraspores 



are often only triple, and arranged tetrahe- 



drally and not in a row (fig. 114). 



BIBL. Harvey, Mar. Algcc, pi. 22 C; 

 Phyc. Br. pis. 139-41, &c. 



CERATAU'LUS, Ehr. A genus of Dia- 

 tomaceae. 



Char. Frustules binate or concatenate, 

 septate; valves turgid, suborbicular or 

 broadly ovoid, with 2 tubular processes al- 

 ternating with 2 spines. Marine and fossil. 



and two empty 



dia . 



