158 
The British Leeches 
Among a number of individuals taken from the same locality one 
often may find forms exhibiting stages intermediate between the 
normal and the trioculate type and not infrequently examples in which 
the eyes are more or less asymmetrically disposed. 
Glossosiphonia complanata, Linnaeus , 1758. 
Plate XIV, Figs. 22—27. Text Figs. 9 and 10 (p. 161). 
Synonymy and Literature: 
A very small sort of Leech, (?) Baker, 1753, p. 415. 
Hirudo lateribus attenuatis — the Snail-leech , Hill, 1752, p. 16. 
Hirudo sexoculata, Bergman, 1757, p. 313, pi. vi, figs. 12,13; Schrank, 1803, p. 162. 
Hirudo complanata, Linnaeus, 1758, p. 650 ; Linnaeus, 1761, No. 2082 ; Weser, 
1765, p. 44 ; Linnaeus, 1767, p. 1079 ; 0. F. Muller, 1774, p. 47 ; 0. F. Muller, 
1776, p. 220; Gmelin, 1788, p. 3097 ; Ure, 1793, p. 233 ; Bose, 1802, p. 256 ; 
Braun, 1805, p. 58, pi. vi, figs. 11—16 (coloured); Turton, 1806, p. 69; Turton, 
1807, p. 129 ; Pennant, 1812, p. 72; Stewart, 1817, p. 357 ; Cai’ena, 1820, p. 97, 
pi. xii, figs. 17, 18; Derheims, 1825, p. 10; Dalyell, 1853, p. 30, pi. iv, figs. 
1—16 (coloured). 
Hirudo crenata, Kirby, 1795, p. 320, pi. xxix ; Turton, 1806, p. 71 ; Turton, 1807, 
p. 129. 
Hirudo crinata, Pennant, 1812, p. 72. 
Glossiphonia tuberculata, Johnson, 1816, p. 25. 
Glossopora tuberculata, Johnson, 1817, p. 346, pi. xvii, figs. 1—10 ; Johnson, 1825, 
p. 49, pi. xvii, figs. 1—10 ; Stark, 1828, p. 142 ; Thompson, p. 482. 
Erpobdella complanata, de Blainville (in Lamarck), 1818, p. 296; de Blainville, 1827, 
p. 263 ; Templeton, 1836, p. 235. 
Clepsine complanata, Savigny, 1822, p. 120; Savigny, 1826, p. 463 ; Moquin-Taudon, 
1826, p. 101, pi. iv, fig. 1 ; Risso, 1826, p. 431 ; Fr. Miiller, 1844 b, p. 25 ; E. 
Blanchard, 1845, p. 377, pi. xviii, fig. 9 (nervous system); Leydig, 1849, p. 2; 
pi. iii, figs. 1—11 (anatomy); Diesing, 1850, p. 452; Grube, 1851, p. 113; 
Picaglia, 1877, p. 153; Whitman, 1878, p. 2 etseq. (development); Schultze, 1883, 
p. 80, figs. 1—4 (nephridia); Nussbaum, 1885, p. 181 (development of repro¬ 
ductive organs); Oka, 1894, p. 81 et seq., pi. iv, figs. 4—15, pi. v, fig. 16, 
etc., pi. vi, fig. 39, etc. (sinus system, nephridia); Leuckart, p. 584, fig. 297; R. 
Blanchard, 1896 c, p. 140 (in North America). 
Glossopora complanata, Fleming, 1822, p. 604; Johnston, 1846, p. 440. 
Sanguisuga complanata, Bruguiere, 1824, p. 132, pi. li, figs. 20, 21 and A. 
Glossobdella complanata, de Blainville, 1827, p. 263, pi. xxxvii, figs. 1, 2; de 
Blainville, 1828, p. 565 ; Gervais, 1836, p. 629. 
Clepsina complanata, de Filippi, 1837, p. 27 ; Brightwell, 1842, p. 14, pi. i, fig. 20 
(coloured, and named in error C. hyalina-, figs. 18 and 19 represent C.hetero- 
clita and not C. complanata as named). 
Glossipora tuberculata, Thompson, 1841, p. 482, and 1856, p. 245 (occurrence in 
Ireland). 
