ENTOZOA. 185 



Sp. Distoma hepaticum, and Distoma lanceolatum MEHL. Fasciola hepatica L., 

 BREMSER Ueb. leb. Wurmer, Tab. iv. figs, n 14, MEHLIS Observed, anat. 

 de Distomate kepatico et lanceolalo, Gottingse, 1825, fol. ; the liver-worm, 

 fluke, la douve, Lebenourm, Schaafwurm, occurs in the gall-bladder of 

 man, but more frequently in ruminating animals, the ox, the deer, and 

 especially the sheep. (MEHLIS has shewn that here two species have been 

 confounded ; the worm figured by BREMSER, op. cit., is Distoma lanceolatum.) 



Dist. globiporum RUD. in different species of the genus Cyprinus. Comp. 

 H. BURMEISTER in WIEGMANN'S Archiv. 1835, n. s. 187 ; V. SIEBOLD, ibid. 

 1836, I. s. 217 -233, Tab. vi. ; Dist. appendiculatum RUD. Entoz. Hist. not. 

 Tab. v. f. i, 2 ; MAYER Beitrdge zur Anat. der Entoz. 1841, pp. 18, 19; in 

 the intestines of Clupea alosa, &c. 



Distoma JBeroesWiLL, in ERICHSON'S Archiv. 1844, s. 343 345, Taf. 10, 

 figs. 10 13. 



Diplostomum NoRDM. Body soft, depressed, oval or roundish, 

 elongate. Mouth anterior, elliptic ; suctorial acetabula two ventral, 

 the anterior the smaller, situated nearly in the middle of the body. 

 (Small animals living gregariously in the eye of fishes.) 



Sp. Diplost. volvens NORDM. MiTcrogr. Beitr. i. Tab. n. ; found by NORDMANN 

 in the vitreous humour and in the lens of different fresh-water fishes (Perca 

 fluviatilis, Gadus lota, &c.) Tt may be the cause of a species of Cataract ; 

 see the figures at Tab. i. figs, i, 2. 



Note. Genus Cercaria MUELL. (comp. above, p. 171,) contains 

 larvse of Distomata. Similar larvae of Trematoda, have caused the 

 formation of other genera by authors. Here are to be referred 

 Bucephalus Y. BAER, and Leucochloridium CAR. 



Amphistoma RUD. (Strigea ABILDG.) Body soft, roundish. 

 Single anterior and posterior pore. 



Comp. C. M. DIESING Monographic der Gattungen Amphistoma und 

 Diplodiscus, Ann. des Wiener Museums, I. 1836, pp. 235 260; also his 

 Nachtrag zur Monographic der Amphistomen, ibid. 11. 1839, s 2 35 2 5 2 - 



Genera Holostomum NITZSCH, Diplodiscus DIES. 

 Sp. Amph. cornutum RUD. Ent. Hist. not. Tab. v. figs, i 7, (Holostomum), 

 in the intestines of Charadrius pluvialis ; most of the species of Amphistoma, 

 particularly of the sub-genus Holostomum, live in birds ; A mph. subclavatum 

 (Diplodiscus subclavatus DIES.), BREMSER Icon. Helm. Tab. vin. figs. 30, 31, 

 DIESING Wiener Ann. i. Tab. xxiv. f. 19 24, is from the intestine of Rana 

 and Bufo; Amph. conicum MUELL. Naturforscher xvin. Tab. in. f. n, DIE- 

 SING 1. 1. Tab. xxni. figs. T 4, is from the paunch of the ox and other rumi- 

 nating animals ; comp. LAURER De Amphistomate conico, Gryphiae, 1831. 



Monostoma ZED., RUD. (Festucaria SCHRANK, Cuv.) Body 

 soft, roundish or depressed. Single anterior pore, aperture inferior 

 or anterior. 



