138 
The British Leeches 
gives a diagnosis based on abundant living material. R. Blanchard 
(1894 b), who establishes the identity of the genus Callobdella with 
Trachelobdella (Diesing, 1850) largely supports this view, amending 
the specific characters of T. lubrica and including among its synonyms 
C. punctata , G. striata and P. littoralis. Concerning C. lophii he 
writes, “La validite spdcifique...nous semble...tres douteuse,...il sera 
probablement ndcessaire de la reunir un jour soit a l’espece precedente 
(T. lubrica) soit a la P. campanulata Dalyell, si tant est que celle-ci 
constitue une espdce solidement etablie.” 
Johansson, on the other hand, in a work on the Swedish Icht.hyo- 
bdellidae (1898, pp. 672—5) denies even that Callobdella and Trachelo¬ 
bdella are synonymous. His observations which, as far as Callobdella 
is concerned, are based upon material preserved in alcohol, are far from 
convincing. Of two facts at least we may be certain. Trachelobdella 
and Callobdella are synonymous, and only one European species is at 
present firmly established, namely T. lubrica (Grube", 1840). 
In the present state of our knowledge, therefore, and until the 
examination of living material can be carried out, we are compelled 
provisionally to refer to this species the examples of Trachelobdella 
recorded from our coasts. 
Trachelobdella lubrica, Grube, 1840. 
Synonymy and Literature: 
Pontobdella lubrica , Grube, 1840, p. 60. 
Piscicola marina , Johnston, 1846, p. 441, pi. xv, figs. 4—6; Thompson, 1856, p. 426. 
Ichthyobdella marina , Diesing, 1850, p. 442. 
Hirudo vittata , Dalyell, 1853, p. 9, pi. i, figs. 16-21. 
(?) Hirudo campanulata , Dalyell, 1853, p. 12, pi. i, figs. 26—27. 
Pontobdella oligothela , Schmarda, 1861, p. 5, pi. xvi, fig. 144. 
(?) Calliobdella lophii, van Beneden and Hesse, 1863, p. 36, pi. iii, figs. 11—16. 
C. punctata , van Beneden and Hesse, 1863, p. 37, pi. iii, figs. 1—14. 
C. striata , van Beneden and Hesse, 1863, p. 38, pi. ii, figs. 1—10. 
Pontobdella littoralis, Johnston, 1865, pp. 42 and 304, pi. i, figs. 4—6 (repeated 
from 1846). 
Scorpaenobdella elegans, Saint Loup, 1886, p. 1180. 
Calliobdella lubrica , Ap&thy, 1888 a, p. 134, et seq., pi. ix, figs. 3 a, b and c, 4 and 9. 
Apathy, 1888 c, p. 57. 
Calliobdella nigra , Apdthy, 1888 c, p. 58. 
Callobdella lubrica, B. Blanchard, 1894 b, p. 14. 
Trachelobdella lubrica, R. Blanchard, 1894 b, p. 64. 
(?) Calliobdella lophii , Johansson, 1898 a, p. 675. 
