ACOMIA. 



[ 12 ] 



ACROSTALAGMUS. 



Here belong, perhaps, the genera Core- 

 thria, Ephelota, and Zooteira (Wright) ; and 

 Alder's animalcules. 



ACO'MIA, Du]. — A genus of Infusoria, 

 of the family Euchelia. 



Char. Body oblong-ovate or irregular, 

 colourless or granular, turbid, composed of 

 a glutinous homogeneous substance con- 

 taining irregular granules, and ciliated only 

 or principally at one end. Dujardiu de- 

 sci'ibes eight species, to which Perty adds 

 one. 



Marine, or inhabiting decomposing in- 

 fusions. Minute and colourless. 



A. vitrea (PI. 80. fig. 3) ; freshwater ; 

 length 1-808. 



BiBL. Duj. Infiis. p. 382 J Perty, Zur 

 Kenntiiiss, i^'c. p. 149. 



ACONTIOPH'ORUS, Brady. A genus 

 of Eutomostraca, Ord. Copepoda. 



A. scutatus and A. annatus ; marine ; 

 around the British coasts. 



BiBL. Bradv, Copepoda {Ray Soc), 3. p. 69. 



ACPtEMO'NIUM, Link— A geuiis of 

 H}-phomycetous Fungi, belonging to the 

 division Mucedines ; distinguished by its 

 jointed threads bearing numerous patent 

 branchlets, each of which is terminated by 



Fie:. 2 



Acremonium fuseum (magnified). 



a single globose spore. Perhaps only states 

 of some other genus. British species : 



A. verticiUatum, Link. On dead wood, 

 trunks of trees. 



A. alternatum, Link, 

 leaves. 



A. fuscmn, Schmidt (lig. 

 wood and sticks. 



A. ra/ufienum, B. and Br. 

 Distinguished by tlie threads being matted 

 together below into a distinct stem. 



BiBL. Enril Flora, v. pt. 2. p. 347; 

 Greville, .W«. Cryp. Fl. 1. 124. figs, land 2; 

 Berk, and lb-. Ami. N. Hist. 1871,. Tune. 



AC1I()CA1^'PI.— Anartiticialdivisionof 

 Mosses (see Mosses). 



ACllO'PElltLS.—A genus of Eutomos- 

 traca, of the family Lyuceidse (Baird). 



On decaying 

 2). On dead 

 On dead frofj-s. 



Char. Shell somewhat harp-shaped, the 

 anterior inferior margin projecting and ob- 

 tusely angular, inferior antennae long ; beak 

 blunt, very sliglitly curved downwards; 

 shell striated withlongitucUnal ribs directed 

 obliquely do^\niwards and forwards ; colour- 

 less. 2 species : — 



A. harpce (PI. 19. fig. 1) ; each branch 

 of inferior antenute with 3 long setae from 

 the extremity of the last joint only. 



A. 7iani(s (PL 19. fig. 2), much smaller 

 than the last ; anterior branch of inferior 

 antemiEe with 4 setae, one arising from the 

 second, and three from the end of the last 

 joint. 



This genus is scarcely di.stinct from Camp- 

 tocercus. 



BiBL. Baird, Ami. N. Hist. xi. 91 ; and 

 Brit. Fniomos.129. 



ACPtOSPEB'MUM, Tode.— A genus of 

 Sphaeronemei (Stylosporous Fungi), con- 

 sisting of minute, somewhat cartilaginous 

 perithecia, a few lines higli, discharging 

 long, wavy, erect, simple, microscopic .spores 

 from a terminal pore or ostiole. British 

 species : — 



A. compressmn, Tode. On dry stalks of 

 herbaceous plants. 



A. yraminitvi, Libert. On dead grasses. 



A. cornntum, which is not uncommon 

 on the gills of blackened Agarics, is merely 

 the winter resting-state of Ayaricus tube- 



7'OSilS. 



BiBL. Fm/l. Flora, v. pt. 2. p. 221 ; 

 Grev., Sc. Crypt. Flora, t. 182. 



ACROSPO'RIUM, Xees.— A generic 

 name formerly applied to certain species of 

 Oidiiim (see Oidiu.ai). 



ACROSTALAG'- 

 MUS, Corda. — A genus 

 of Mucorini (Phycomy- 

 cetous Fungi), distin- 

 guished by its whorled 

 branched septate 

 threads, each branch 

 terminated by a globose 

 vesicle, which is pierced 

 by the tip of thebranch- 

 let, from which nume- 

 rous spores are given ott' 

 within the vesicle. 



J^erticilliumlati'ritiHin 

 is a form of this beauti- 

 i'ul mould, with minute 

 naked spores. 



The aceompannn? 

 fisrure represents Aero- Aci-ost.^lagnmscinnaba- 



• , 1 . , . nil us (hichly magni- 



Htalayinus cinnabannus, fled). 



