AMCEB.EA. 



[ 36 ] 



AMPHIMONAS. 



231 ; Auerbacli, Sieb. and K611. Zeitsch. 

 \ii. 805 ; Schultze, Polythal. ; Carter, Ann. 

 N. Hist. 18o6 aud 18(14; Wallicb, ihid. 

 1863, p. 198 ; Broun, Thier-Reich, 1880 ; 

 Perty, Z. Kenntn. p. 188 ; Tatem, Mn. Mic. 

 Jn. 1. p. 352 ; Lieberkiihn, Ann. A^. Hist. 

 1870, Ti. p. 497; Greeff, Arch. f. mik.An. 

 ii., & X. 1873, p. 51. 



AMCEB.^'A, Ehr.— A family of Rbizo- 

 poda, of tbe order Lobosa. 



Char. Animals sbell-less, composed of a 

 glutinous substance, witbout integument or 

 internal structure, constantly clianging form 

 by tbe protrusion and retraction of parts of 

 tbe body, wbence result variable expansions ; 

 movement slow. 



Tbey are propagated by spontaneous fis- 

 sion. Wben cut or torn, eacb segment 

 contracts upon itself and forms a new being. 

 Spermatozoa bave been stated to be formed 

 from tbe nucleus, and ova formed from tbe 

 sarcode,by Carter in Amoeba ; GreelFalso de- 

 sciibes spermatozoa, but tbese are doubtful. 



Gen. : Amoeha. Pseudopodia of one kind. 



Podostoma. Pseudopodia of two kinds, — 

 one large and for locomotion, tbe otber 

 forming a proboscis, and serving for nutri- 

 tion. 



Petahpus. Pseudopodia cylindrical, ex- 

 panding at tbe ends into tbin plates. 



AMPELOM'YCES, Ces. See Oibium. 



AMPHIBLES'TllA, Presl.— A genus of 

 Polypodiaceous Ferns ; now referred to 

 Dictyozypldnm and Pteris. — Exotic. 



AMPIIICAM'PA, Ehr.— A doubtful ge- 

 nus of Fossil Diatomacefe. 



A. Eruca (PI. 18. fig. 11). 



A. mirahilis (PL 18. fig. 12). 



Fossil at Tisar, Mexico. 



BiBL. Ebrenberg, Ber. d. Berl. Ah. 1855, 

 86 ; and Mikroq. 



AMPlIlDINiUM, CI. aud L.— A genus 

 of cilio-flagellate Infusoria. 



A. operculatum (PI. 53. fig. 2). Marine, 

 Norway. 



BiBL. CI. and Lacbm. Infus. p. 410 ; Kent, 

 Inf. p. 461. 



"AMPIIID'HTM, Nees.— a genus of 

 Mosses, included under Zygodon. 



AMPHILEP'TUS.— A genus of Infusoria, 

 of tbe family Colpodea (Ehr.). 



Eye-spot wanting ; no tongue-like pro- 

 cess ; proboscis aud tail present. 



The so-called proboscis resembles in ap- 

 pearance a neck. Tlie mouth is situated 

 beneath the junction of the proboscis and 

 the body. 



Dujardin gives the foiJowing characters. 



placing the genus among his Paramecina. 

 Body elongated, fusiform or lanceolate, nar- 

 rowed at eacb end, or at least at the anterior 

 extremity, and furnished with an oblique 

 lateral mouth. 



Tbese animals are usually found in clear 

 marsh water, and in streams, between 

 aquatic plants. They are all fm-nisbed with 

 cilia but one ; in some these are arranged in 

 longitudinal rows. Species :• — 



Amphileptus anser, E. (Dileptus anser, 

 D.). Colourless ; length 1-120". Proboscis 

 obtuse, as long as tbe body. 



A. margarilifer^ E. and D. Colourless ; 

 1-72". Proboscis acute, as long as the 

 body. 



A. moniliger., E. and D. Colourless; 

 proboscis short ; nucleus moniliform ; 1-72 

 to 1-96". 



A. viridis, E. and D, Green ; 1-120 to 

 1-46". 



A.fasciola, E. andD. Colourless; linear- 

 lanceolate ; 1-720 to 1-144" (PI. 30. f. \0a, 

 from above ; b, side view). 



A. tneleaffris (Loxophi/llunimelear/ris, D.). 

 Colourless ;_ 1-72" (PI. 31. f. 42 a; b, anterior 

 portion in side view). 



A. loiujicoUis, E. Colourless ; rounded 

 behind, tapering in front; 1-120 to 1-96". 



A. papillosus, E. Yellowish brown ; body 

 covered with papillfe ; 1-000 to 1-430". 



A. vorax, D. i^Trachelius vorax, E.). 

 Colourless. 



A. ovmn, D. (^Trachclius ovittn, E.). 

 Colourless. 



Claparede and Lachmann describe other 

 species. 



See Teachelina. 



BiBL. Ehr. Infusionsth. p. 354 ; Dujardin, 

 hifus. p. 483 ; Claparede and Lachmann, 

 Infus. p. 3J9; Kent, Infns.^. 523. 



"AMPHILO'MA (Fr.'), Nyl.— A genus of 

 Lichens, fam. Lichenacei. 



Char. Thallus white, pulverulent, soft, 

 submcmbranaceous, containing granida 

 gonima. Hypothallus bluish-black, tomen- 

 tose. 



A. lanuginosum. On shady mossy rocks, 

 frequent. 



BiBL. Leigbton, Zzc'A.-i^Zora, 1879, p. 156. 



AMPIIIM'ONAS.— A genus of Infusoria, 

 of the family Monadina (Duj.). 



Found in kept saline solutions and marsh 

 water. Species :— 



A. dispar. Colourless ; ' length 1-3860 to 

 1-2700" (PL 30. fig. 11). 



A. caudafa (Bodo saltans ?, Ehr.). Co- 

 lourless ; 1-2180 to lrl270". 



