floscui.ari.t:a. 



[ 329 ] 



FORAMINIFERA. 



Eyes sometimes absent in the adult ani- 

 mals. Sheath or carapace irequently so 

 transparent as to be scarcely distinguish- 

 able. Rotatory organ with five or six lobes ; 

 the number, hcnvever, appears variable ; for 

 Ehrenberg states in one place that the lobes 

 are tive or six, in another that they are 

 always six. The so-called proboscis is pro- 

 bably only one of the lobes of the rotatory 

 orcrans ; freshwater. 



>. ornuta, E. (PI. 43. fig. 32). Carapace 

 hyaline; rotatory lobes six (Ehr.), tive 

 (J3uj.), -svith long ciha, but no central pro- 

 boscis; length 1-108". 



Lobes of"" rotatory organ thickened at the 

 ends. 



F. pj'oboscidea, E. Carapace hyaline; 

 rotatory organ 6-lobed, with short cilia 

 surrounding a centrtd proboscis ; length, 

 when extended, 1-18". Teeth (tig. 33). 



F. campanulata, Dob. Differs from F. 

 oniatd, Ehr., in having five lobes, and these 

 flattened ; length, when extended, 1-50". 



F. cornuta", Dob. Rotatory organ 6- 

 lobed, one of the lobes with a narrowed, 

 not ciliated cornu attached, arising from its 

 outside : cilia long ; length, when extended, 

 1-40". ' 



Other species. 



These exquisitely beautiful animals are 

 foimd adhering to aquatic plants, as Con- 

 ferva, CeratopJtyJlmn , &c. 



BiBL. Ehr. Inf. 407; Duj. Inf. 609; 

 Dobie, Ann. N. H. 1849, iv. 233 ; Cubitt, 

 Mn. Mic. Jn. 1869, ii. 143 (PI.), and 1871, 

 vi. 83 (new spec.) ; Weisse, Sieh. S, KiJll. 

 Zeitsch. xiv. 107 (PI.) ; Hudson, Jn. Mic. 

 Soc. 1881, i. 4. 



FLOSCULARLE'A.— A family of Rota- 

 toria. 



C/uir. Furnished with a carapace or 

 sheath ; rotatory organ single, with a tiexu- 

 ous, lobed or divided margin. 



The cilia are often long, and only vibrate 

 occasionally, mostly remaining rigidly ex- 

 tended. 



Genera, 



Eyes absent 1- Tubicolaria. 



Eye single ^- Stephanoceros. 



(t)\ -L J j single 3. Lhnnins. 



Eyes j Rotatory J --'ooea-^ aggregate 4. Lacinulurla. 

 two} organ j 4-lobed o. .Uelicertn. 



(.5- orb-lobed 6. Floscularia.] 



The eyes in some of the genera {Stepha- 

 noceros and Floscularia) disappear in the 

 adult state ; so that they must be looked for 

 in the young, or even in the partly hatched 

 ova, in which they may often be distinctly 

 fceen. 



BiBL. Ehrenberg, Infus. p. 398. 

 FLUKE. See Di stoma. 

 FLUS'TRA, Linn. (Sea-mat).— A genus 

 of Oheilostomatous Polyzoa, family Flus- 

 trida3. 



Char. Polyzoarium plant-like, foliaceous, 

 flexible ; cells in contact, alternate, in seve- 

 ral rows, and on both sides of the polypi- 

 dom ; aperture transverse, semicircular or 

 lunate, valvular and subterminal. Marine. 

 F. foliacea. Cells narrow at the base, 

 rounded at the end, with scattered marginal 

 spines. Common; .about 4" high. 



F. cliartacea. Cells oblong, slightly 

 broader in the middle ; lateral margins with 

 a single minute spine. 

 About 1" in height. 



F. truncata. Cells linear-oblong, truncate 

 at the end, margins without spines : 4-5" 

 high. 



F. carbasea= Carbasea papi/rea ; F. avi- 

 cularis= Bi((/ula Jlahellata ; F. Murrayana = 

 Bugida 31iirr. ; F. membranacea, coriacea, 

 and lineata = Membranipora m., c, and /. 



BiBL. Johnston, Br. Zooph. 342 ; Reid, 

 Ann. N. H. 1845, xvi. 385; Busk, Brit, 

 litis. Catal. 47 ; Hincks, Pohjz. 114. 



FLUS'TRAD^.— A family of Cheilo- 

 stomatous Polyzoa. 



Distinguished by the expanded, foliaceous, 

 flexible and erect polyzoary, with its nu- 

 merous contiguous cells. Two genera, 

 Flustra. Cells on both sides. 

 Carbasea. Cells on one side only. 

 BiEL. Busk, Mar. Pohjz. (Br. Mus.) 46. 

 FLUSTREL'L.\, Gray.— A genus of 

 Ctenostomatous Polyzoa, of the order In- 

 fundibulata, and family Alcyonidiidaj. 



Incrustiug, cells radiating or alternate, 

 the circumference with setaj ; oritice rect- 

 angular. 



F. hispida. Common near low-water 

 mark upon Fitcus serratus. Polyzoary 

 brown, fleshy. 



BiBL. Johnston, Br. Zooph. 363 ; Red- 

 fern, Qu. Mic. Jn. vi. 96; Hincks, Polyz, 

 504. 



FLY. See MrscA. 

 FOLLICULA'RI A = i^;r/ff . 

 FO^TINA'LIS, L.— A genus of pleuro- 

 carpous Mosses. 



F. antijn/retica, ^greater water-moss ; in 

 rivulets. F. sqnamafa. (Wilson, Bri/ol. 

 Brit. 422.) 



FORAMINIF'ERA.— An order in the 

 Animal Kingdom, belonging to the Sub- 

 kingdom Protozoa, and class Rhizopoda. 

 Char. Gelatinous, structureless, usually 



