LINGULINOPSIS. 



[ 472 ] 



LITOSIPHON. 



dosaria in being laterally compressed and 

 having a slit-like aperture. 



BIBL. Carpenter, Introd. 163. 



LINGULINOPSIS, Reuss. This may 

 be denned as a Lingulina having its early 

 chambers coiled ; or a Maryinulina much 

 compressed and opening with a rift. 



BIBL. Reuss, K. bohm. Oes. Wiss. 1860. 



LINOP'ODES, Koch. A genus of Trom- 

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

 the anterior pair very long and slender. 

 Three species j among moss j red or orange. 

 (Murray, EC. Ent. 122 ; Hermann, Apter.) 



LI'NUM, L. See FLAX. 



LIOSI'PHON, Ehr. A genus of Holo- 

 trichous Infusoria, fain. Trachelina. 



Char. Resembles Nassula, but the frontal 

 region prolonged. 1 species. 



BIBL. Pritchard, In/us, p. 627. 



LIOSTEPHA'NIA, Ehr. A genus of 

 Melosireae (Diatomaceae). 



Char. Frustules single, orbicular; disk 

 smooth, but with a crown of rays round a 

 smooth space ; 3 species ; Barbadoes. 



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



BIBL. Pritchard, Infus. p. 813. 



LIOTHE'UM, Nitzsch. A genus of 

 Anoplura, family Liotheidae. 



Char. Antennae clavate or capitate j max- 

 illary palpi conspicuous ; mouth with strong 

 mandibles ; tarsi with two claws. 



Antennae four-jointed; mandibles with 

 two teeth; maxillary palpi long, filiform, 

 four-jointed ; labial palpi very short, two- 

 jointed. 



The genus has been subdivided into seven 

 subgenera. The species are very numerous, 

 and are parasitic upon birds. 



L. (Menopori) pallidum (PL 35. 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. Denny, Monogr. Anoplur. p. 204. 



LIPAROGY'RA, Ehr. A genus of 

 Melosireae (Diatomaceae). 



Char. Frustules simple, cylindrical, each 

 having an internal spiral filiform band or 

 crest. 



BIBL. Pritchard, Infus. p. 823. 



LIPEU'RUS, Nitzsch. A subgenus of 

 Philopterus. The species are found on the 

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



BLBL. Macalister, Qu. Micr. Jn. 1871, 

 163 ; Murray, EC. Ent. 381; M<%nin ; Paras. 

 88. 



LIR ADIS'CUS, Grev. A genus of Dia- 

 tomaceae. 



3 species; Barbadoes deposit. L. Bar- 

 badensis (PI. 52. fig. 13). 



BIBL. Greville, TV. Mic. Soc. 1865. 



LISTROPH 'ORUS, Pagenst. A genus 

 of Acarina, allied to Scarcoptes. Two spe- 

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

 the partridge, &c. The maxillae form two 

 flexible claspers, for clinging to the hairs. 

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

 Murray, Econ. Ent. 324.) 



LITHIC ACID. See URIC ACID. 



LITHOCYS'TIS, Allm. A genus of 

 Corallinaceae (Florideous Algae), consisting 

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

 has been found as an epiphyte, forming 

 minute white dots upon Chrysimenia clavel- 

 losa. The minute dots consist of one or 

 more fan-shaped fronds composed of square 

 cells. The plant is colourless, brittle, and 

 effervesces in acid. The fan-shaped frond 

 somewhat resembles in structure imperfect 

 or segmental fronds of COLEOCHJETE. 



BIBL. Harvey, Mar. Alg. Ill, pi. 14 B ; 

 Phyc. Brit. pi. 166. 



LITHODES'MIUM, Ehr. A doubtful 

 genus of Diatomaceae. Marine. 



L. undulatum (PI. 17. fig. 4 a, front view ; 

 4 b) side view). Surface without marking?, 

 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. Bacitt. p. 135, and Sp. Ala. p. 133. 



L1THOFELLINIC ACID. Is a com- 

 ponent of certain concretions called bezoars, 

 found in the alimentary canal of various 

 kinds of goat in Persia &c. 



It is crystalline, 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. 



LITHOG'RAPHA, NyL A genus of 

 Graphidei (Lichenaceous Lichens). 



Char. Thallus crustaceous or evanescent; 

 apothecia lirelleeform, black, tumid ; epi- 

 thecium rimiform, margins thick, convex ; 

 hypothecium black, thick, entire ; spores 8 

 or numerous, simple or 1 -septate. 



7 British species. Rare. 



BIBL. Leiphton, Brit. Lich. Flor. p. 393. 



LITOSI'PHON, Harv. A genus of 

 Pimctariaceee (Fucoid Algae), with fronds 



