MARSIPELLA. 



[ 492 J 



MASTOGONIA. 



gous to the two kinds of spore in Lycopodi- 

 aceae, but differing in their mode of develop- 

 ment. 



Pilularia globulifera is the only British 

 representative of this family. 



BIBL. Hofmeister, Vergl. Unters. 103, 

 pis. 21 & 22 ; Henfrey, Tr. Br. Assoc. 1851 ; 

 Ann. N. H. 2 ser. ix. 447 ; Hanstein, Mo- 

 natsb. Ak. Berlin, 1864, Ann. N. H. 1864 ; 

 Sachs, Bot. 444 (fig.). 



MARSTPEL'L A, Norm. A delicate are- 

 naceous Foraininifer, related to Astrorhiza. 

 (Norman, Ann. N. H. 5. i. 281 j Brady, Qu. 

 Mic. Jn. xix. 17.) 



MARY'NA, Griiber. A genus of Holo- 

 trichous Infusoria. Bodies cup-shaped, 

 with a funnel-shaped cleft neck ; terminal 

 on the ends of a branched zoary. M. socialis, 

 marine (Kent, Inf. 520.). 



MASTIGAMQE'BA, Schulze. A genus 

 of Flagellate Infusoria. 



Char. Amoeba-like, changeable, creeping, 

 emitting pseudopodia, with an anterior fla- 

 gellum. Four species; freshwater. M. 

 aspera (PI. 53. fig. 22). (Kent, Inf. 221.) 



MASTIGOB 'RYUM. See HEBPETIUM. 



MASTIGOCER'CA, Ehr. A. genus of 

 Rotatoria, of the family Euchlanidota. 



CJiar. Eye single and cervical; tail-like 

 foot styliform j carapace prismatic, with a 

 dorsal crest. 



M. carinata (PI. 43. fig. 46, side view). 

 Foot as long as the body ; freshwater ; entire 

 length 1-72". 



BIBL. Ehrenberg, Infus. p. 460. 



MASTIGOC'LADUS, Cohn. A genus 

 of Confervoid Algae, allied to Sirosiphon. 



Char. Filaments moniliform, dichoto- 

 mously ramose, without sheaths. Secondary 

 branches with cylindrical cells, among 

 which are some elliptical; forms a fleshy, 

 spongy layer. 



M. lammosus (PL 52. fig. 9), in warm 

 springs. 



BIBL. Rabenh. Fl Eur. Alg. ii. 284. 



MASTIGONE'MA, Schwabe. A genus 

 of Rivulariaceae. 



Char. Filaments tufted, articulated, elon- 

 gate, with thin ends, sheathed; apex of the 

 sheath open. M. plana, an Irish and Scot- 

 tish species. 



BIBL. Rabenh. Fl. Eur. Alg. ii. 226. 



MASTIGOPH'ORA, Hincks,= Lepralia 

 pt. (Hincks, Poly*. 278). 



MASTIGOTHRIX, Kiitz A genus of 

 Rivulariacese. 



Char. Filament single, bent, flagelliform, 



ending in a produced hyaline process, 

 sheathed and jointed ; on freshwater 

 Algae. 



M. ceruginosa (PI. 52. fig. 10). 



BIBL. Rabenhorst, Alg. ii. 225; Kiitz. 

 Phijc. Genet: 232. 



MASTOGLO'IA, Thwaites. A genus of 

 Diatomacese. 



Distinguished by the Navicula-like frus- 

 tules, the hoops of which are furnished with 

 loculi, immersed in a jnammillate frond. 



Five British species, marine and fresh- 

 water. 



M. lanceolate (PI. 51. fig. 26). Valves 

 lanceolate, elliptical, ends acute ; loculi 

 8-30 ; in brackish water. 



M. Danseii = Dickieia Darnell, Thw. 



BIBL. Smith, Brit. Diat. ii. 63; Thwaites. 

 Ann. N. H. 1848, i. 171. 



MASTOGO'NIA,Ehr. A doubtful genus 

 of fossil Diatomaceae. 



Char. Frustules single ; valves dissimilar, 

 angular, mammiform, orbicular at the base, 

 free from umbilical processes, not cellular, 

 angles radiating. 



The (eight) species are interesting from 

 the structure of the two valves of the f pus- 

 tules differing. Thus in one, M. Crux (PI. 

 18. fig. 23 a) the angles and rays are four 

 in one valve, but seven in the other j in 



Fig. 452. 



Fig. 453. 



Fig. 454. 



Matonia pectinata. 

 Fig. 452. Part of a fertile pinna. Magn. 3 diams. 



Fig. 453. Indusium opened at the side, showing thecse 

 in situ. Magn. 25 diams. 



Fig. 454. The same with the thecae removed. Magn. 

 25 diams. 



