LINGULINOPSIS. 



[ 472 ] 



LITOSIPHON. 



dosan'u in being laterally compressed and 

 having a slit-like aperture. 



BiBL. Carpenter, Introd. 163. 



LINGULINOPSIS, Pveuss.— This may 

 be defined as a Luk/uUuu having its early 

 chambers coiled ; or a MarginHlina much 

 compressed and opening with a rift. 



BiBL. Reuss, K. bo/nn. Ges. Wiss. 18G0. 



LINOP'ODES, Koch.— A genus of Trom- 

 bidiua (Acarina); with the legs 6-jointed, 

 the anterior pair very long and slender. 

 Three species ; among moss ; red or orange, 

 (Murrav, Ec. Ent. \-12 ; Hermann, Apter.) 



Ll'NUM, L. See Flax. 



LIOSl'PHON, Ehr.— A genus of IIolo- 

 trichous Infusoria, fam. Trachelina. 



Char. Resembles Nassula, but the frontal 

 region jn-olonged. 1 species. 



BiBL. Pritchard, Infus. p. C27, 



LIOSTEPHA'NIA, Ehr.— A genus of 

 Melosireoe (Diatomaceae). 



Char. Frustules single, orbicular ; disk 

 smooth, but with a crown of rays round a 

 smooth space ; 3 species ; Barbadoes. 



L. rotida (PI. 51. fig. 17). 



BiBL. Pritchard, Infus. p. 813. 



LIOTHE'UM, Nit'zsch.— A genus of 

 Anoplura, family Liotheidee. 



Char. Antennse clavate or capitate ; max- 

 illary palpi conspicuous ; mouth with strong 

 mandibles ; tart-i with two claws. 



Antenna} four-jointed ; mandibles with 

 two teeth; maxillary palpi long, filiform, 

 four-jointed ; labis-l palpi very short, two- 

 jointed. 



The genus has been subdivided into seven 

 subgenera. The species are very numerous, 

 and are parasitic upon birds. 



L. {Meiiopon) 2)aUidum (PL 36. fig. 7). 

 Elongate, of a pale straw-colour, shining and 

 smooth ; head slightly sinuate on each side, 

 with a dark pitchy spot before each eye. 

 Length 1-24 to 1-16". Common on the 

 domestic fowl. Other species on the par- 

 tridge, pheasant, and quail. 



BiBL. Dennv, Monoqr. Anoplur. p. 204. 



LIPAROGY'RA, Ehr.— A genus of 

 MelosirefB (Diatomaceaj). 



Char. Frustules simple, cylindrical, each 

 having an internal spiral filiform band or 



crest. 



BiiiL. Pritchard, Infiis. p. 823. 



LIPEU'RUS, Nitzsch.— A subgenus of 

 rhilopterm. The species are found on the 

 pigeon, the goose, the fowl, and the turkey. 



BiBL. Macalister, Qu. Micr. Jn. 1871, 

 103 ; MurraV; Ec. Eid. 381; Meguiu; Faras. 

 88. 



LIRADIS'CUS, Grev.— A genus of Dia- 

 tomacete. 



3 species; Barbadoes deposit. L. Bar- 

 badensis (PI. 62. fig. 13). 



BiBL. Greville, 7V. Mie. Soc. 1865. 

 LISTROPH'ORUS, Pagenst— A genus 

 of Acarina, allied to Sarcoptes. Two spe- 

 cies, on field-mice, rabbits, and the ferret, 

 the partridge, &c. The maxilte form two 

 flexible claspers, for clinging to the hairs. 

 (Pagenstecher, Zeits. wiss. Zool. xi. 156; 

 Murrav, Boon. Ent. 324.) 



LIT'IHC ACID. See Ueic Acid. 



LITIIOOYS'TIS, Allm.— A genus of 

 Coralliiiaceffi (Floiideous Algas), consisting 

 of a single species, L. AUmanni, Hass., which 

 has been found as an epiphyte, forming 

 minute white dots upon Chrysimenia clavcl- 

 losa. The minute dots consist of one or 

 more fan-shaped fronds composed of square 

 cells. Tlie plant is colourless, brittle, and 

 effervesces in acid. The fan-shaped frond 

 somewhat resembles in structure imperfect 

 or segmental fronds of CoLEOCH^^iTE. 



BiBL. Harvev, Mar. AI</. Ill, pi. 14 B ; 

 Phyc. Brit. pi. 166. 



LITHODES'MIUM, Ehr.— A doubtful 

 genus of Diatomaceffi. Marine. 



L. tmdulatum (PL 17. fig. 4 a, front view ; 

 4 J, side view). Surface without markings, 

 very pellucid, two of the sides undulate, the 

 third plane and with two marginal notches ; 

 angles obtuse ; length of joints 1-480". 



BiBL. Ehr. Abh. d. Berl. Akad. 1840; 

 Kiitz. Bacill. p. 136, and Sp. Alg. p. 133. 



LITHOFELLINIC ACID.— Is a com- 

 ponent of certain concretions called bezoars, 

 found in the alimentary canal of Aarious 

 kinds of goat in Persia ttc. 



It is ciTstalline, insoluble in water, readily 

 so in hot alcohol, but little in ether. 



The perfect crystals form six-sided prisms 

 with truncated ends ; but when somewhat 

 rapidly deposited from an alcoholic solution, 

 they are modified as represented in PL 11. 

 fig. 14. With Pettenkofer's test they are 

 turned red. 



LITIIOG'RAPHA, NyL— A genus of 

 Graphidei (Lichenaceous Lichens). 



Char. Thallus crustaceous or evanescent ; 

 apothecia lirella^form, black, tumid ; epi- 

 thecium rimi form, margins thick, convex; 

 hypolhecium black, thick, entire; spores 8 

 or numerous, simple or 1 -septate. 



7 British species. Rare. 



BiBL. Leinhton, Brif. Lich. Flor. p. ,303, 



LITOSIPHON, Harv.— A genus of 

 Punctariaceie (Fucoid Algae), with fronds 



