ACOMIA. 



ACROSTALAGMUS. 



Here belong, perhaps, the genera Core- 

 thria, Ephelota, and Zuoteira (Wright) j and 

 Alder's animalcules. 



ACO'MIA, Duj. A genus of Infusoria, 

 of the family Enchelia. 



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. Dujardin de- 

 scribes eight species, to which Perty adds 

 one. 



Marine, or inhabiting decomposing in- 

 fusions. Minute and colourless. 



A. vitrea (PL 30. tig. 3) ; freshwater : 

 length 1-868. 



BIBL. Duj. Infus. p. 382 j Perty, Zur 

 Kenntniss, fyc. p. 149. 



- ACONTIOPH'ORUS, Brady. A genus 

 of Entornostraca, Ord. Copepoda. 



A., scutatus and A. armatus] marine; 

 around the British coasts. 



BIBL. Brady, Copepoda (Ray Soc.}, 3. p. 69. 



ACREMO'NIUM, Link A genus of 

 Hyphomycetous Fungi, belonging to the 

 division Mucedines; distinguished by its 



C:ed threads bearing numerous patent 

 chlets, each of which is terminated by 



Fig. 2. 



Acremonium fuscum (magnified). 



a single globose spore. Perhaps only states 

 of some other genus. British species : 



A. verticillatum, Link. On dead wood, 

 trunks of trees. 



A. alternatum, Link. On decaying 

 leaves. 



A. fuscum, Schmidt (fig. 2). On dead 

 wood and sticks. 



A. ranigenum, B. and Br. On dead frogs. 

 Distinguished by the threads being matted 

 together below into a distinct stem. 



BIBL. Engl. Flora, v. pt. 2. p. 347; 

 Greville,#cott. Cryp. Fl. 1. 124. figs, land 2; 

 Berk, and Br. Ann. N. Hist. 1871, June. 



AC ROC AR'PL An artificial division of 

 Mosses (see MOSSES). 



ACRO'PERUS. A genus of Entomos- 

 traca, of the family Lynceidse (Baird). 



Char. Shell somewhat harp-shaped, the 

 anterior inferior margin projecting and ob- 

 tusely angular, inferior antennae long ; beak 

 blunt, very slightly curved downwards; 

 shell striated with longitudinal ribs directed 

 obliquely down wards and forwards; colour- 

 less. 2 species : 



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

 of inferior antennae with 3 long setae from 

 the extremity of the last joint only. 



A. nanus (PI. 19. fig. 2), much smaller 

 than the last ; anterior branch of inferior 

 antennae with 4 setae, one arising from the 

 second, and three from the end of the last 

 joint. 



This genus is scarcely distinct from Camp- 

 tocercus. 



BLBL. Baird, Ann. N. Hist. xi. 91 ; and 

 Brit. Entomos. 129. 



ACROSPER'MUM, Tode. A genus of 

 Sphaeronemei (Stylosporous Fungi), con- 

 sisting of minute, somewhat cartilaginous 

 perithecia, a few lines high, discharging 

 long, wavy, erect, simple, microscopic spores 

 from a terminal pore or ostiole. British 

 species : 



A. compressum, Tode. On dry stalks of 

 herbaceous plants. 



A. graminum, Libert. On dead grasses. 



A. cornutum, which is not uncommon 

 on the gills of blackened Agarics, is merely 

 the winter resting-state of Agaricus tube- 

 rosus. 



BIBL. Engl. Flora, v. pt. 2. p. 221 ; 

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



ACROSPO'RIUM, Nees. A generic 

 name formerly applied to certain species of 

 Oidium (see OIDIUM). 



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 the branch- 

 let, from which nume- 

 rous spores are given off 

 within the vesicle. 



VerticiUiumlateritium 

 is a form of this beauti- 

 ful mould, with minute 

 naked spores. 



The accompanying 



figure represents Aero- Acrostalaemns cinnaba- 

 7 . rinua (highly niagm- 



stalagmus cinnabar mm, fi e d). 



Fig. 3. 



