MARSIPELLA, 



[ 492 J 



MASTOGONIA, 



gous to the two kinds of spore in Lycopodi- 

 acese, bat differing in their mode of develop- 

 ment. 



Pilularia (jlohuJifera is the only British 

 representative of this ftimil}'. 



BiBL. Hofmeister, Venjl. Writers. 103, 

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

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

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

 Sachs, £o(^.444(tij?.). 



MARSIPEL'LA, Norm.— A delicate are- 

 naceous Foramiuifer, related to Astrorhiza. 

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

 Mic. Jn. xix. 17.) 



MARY'NA, Griiher.— 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.). 



MASTIGAMCE'BA, Schulze.— A genus 

 of Flagellate Infusoria. 



Char. Amojba-like, changeable, creeping, 

 emitting pseudopodia, with an anterior fla- 

 gellum. Four species ; freshwater. M. 

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



M ASTIGOB 'RYUM. See Herpetium. 



MASTIGOCER'CA, Ehr.— A genus of 

 Rotatoria, of the family Euchlanidota. 



Char. Eye single and cervical ; tail-like 

 foot styliform; 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, Infiis. p. 460. 



MASTIGOC'LADUS, Cohn.— A genus 

 of Confervoid Algse, allied to Sirosiphon. 



Char. Filaments moniliform, dichoto- 

 mously ramose, without sheaths. Secondary 

 branches with cylindrical cells, among 

 which are some elliptical ; foi-ms a fleshy, 

 spongy layer. 



M.^laminosus (PL 52. fig. 9), in warm 

 springs. 



BiBL. Rabenh. FL Eur. Air,, ii. 284. 



MASTIGONE'MA, Schwabe.— A genus 

 of Rivulariacese. 



Char. Filaments tufted, articulated, elon- 

 gate, with thin ends, sheathed ; apex of the 

 sheath open. M. }}lana, an Irish and Scot- 

 tish species. 



BiBL. Rabenh. Fl. Eur. Air,, ii. 226. 



M ASTIGOPII'ORA, Hincks,= iep-a//a 

 pt. (Hincks, Volyz. 278). 



MASTIGO'TliRIX, Kiitz.— A genus of 

 Rivulariaceae. 



Char. Filament single, bent, fiagelliforra, 



ending in a produced hyaline process, 

 sheathed and jointed ; on freshwater 

 Algae. 



M. (sruc,inosa (PI, 52. fig. 10). 



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

 Phyc. Oentr. 232. 



MASTOGLO'IA, Thwaites.— A genus of 

 Diatomacefe. 



Distinguished by the Navicula-\\kQ frus- 

 tides, the hoops of which are furnished with 

 loculi, immersed in a^mammillate frond. 



Five British species, marine and fresh- 

 water. 



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

 lanceolate, elliptical, ends acute ; loculi 

 8-30 ; in brackish water. 



M. Danseii z= Uickicia Danseii, Thw. 



BrsL. Smith, ^/-i^. Diat. ii. 63; Thwaites, 

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



MASTOGO'NIA,Ehr.— A doubtful genus 

 of fossil Biatomaceae. 



Char. Frustules single ; valves dissimilar, 

 angular, mammiform, orbicidar 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 frus- 

 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 ; in 



Fig. 452. 



Fig. 453. 



Fig. 454. 



Matonia peetinata. 



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



Fig. 453. Indusium opened at the side, showing theca» 

 in situ. Magn. 2.5 diams. 



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

 25 diams. 



