W. H. Leigh-Siiarpe 
217 
APPENDIX. 
An attempt to separate the genera Calliobdella and Trachelobdella, 
I. Records and Literature. 
CALLIOBDELLA 
Brest .— Van Beneden and Hesse (1863), 
Recherckes sur les Bdellodes ou Hiru- 
dinees. 
Coasts of Norway (Bergen, Helso etc .).— 
Genus amended and defined by 
JoHANNSON (1896), Bidrag till Icdn- 
nedomen om sveriges IclithyohdelUder, 
Upsala ; also Johannson (1896), Die 
Ichihyobdelliden in Zool. Reichsmuseum 
in Stockholm. 
Respiratory vesicles defined as 11 pairs in 
number, 6 annuli to abdominal somites 
and no vesicles on the preclitellum. 
Plymouth .— Leigh-Sharpb (1913), Journ. 
Marine Biological Association, vol. x. 
No. 1. 
Work of Johannson confirmed. 
Seas of Japan (t). —-Two new species de¬ 
scribed by Oka, Annot. Zool. Jap. 
(1910), vol. VTE. p. 174, but as he de¬ 
fines these as having 5 annuli to the 
abdominal somite, and 13 pairs of respi¬ 
ratory vesicles they may be at once 
ruled out, though described as Callio¬ 
bdella. 
TRACHELOBDELLA. 
(?) Brazil. — Diesing (1850).— Systema Hel- 
minthum, i. 
Mediterranean. — Blanchard (1894), “ Hiru- 
dinees de ITtalie,” Boll. Mus. Zool. 
Torino, vol. ix. No. 192. 
Genus defined with 4 non-respiratory 
vesicles on the preclitellum, respira 
tory vesicles 12 pairs in number, 
3 or 6 annuli on the abdominal somite, 
described as Calliobdella, but after¬ 
wards the author merges Calliobdella 
with Trachelobdella, defining respira¬ 
tory vesicles 12 to 14 pairs. 
Scotland (I). — McIntosh (1874), Inverte¬ 
brates of St Andrews. 
- (?).—Scott (1901), “ Parasites of 
Fishes,” Wth Annual Report Fish. 
Board of Scotland, vol. m. p. 138. 
Both these reports give the respiratory 
vesicles as 12 to 14 pairs, rest of de¬ 
scription vague, may possibly be Tra¬ 
chelobdella. 
Seas of Japan (?).—New species described 
by Oka (1910), Annot. Zool. Jap. vn. 
p. 173, defined with 6 annuli to the 
abdominal somite, and 13 pairs of 
respiratory vesicles, may possibly be 
Trachelobdella. 
Turkestan. — Scegolev (1912), Trd. gid- 
robiol. St. Olubokoe, Moskva, vol.' iv. 
(I have'not been able to obtain access 
to this Paper.) 
II. Summary of the principal differences 
(1) Respiratory vesicles 11 pairs. 
(2) No non-respiratory vesicles on the 
preclitellum. 
(3) Preclitellum of 11 annuli. 
between Blanchard's description and mine. 
(1) Respiratory vesicles 12 pairs (after¬ 
wards altered to 11 or 12 pairs, after 
examining specimens diagnosed by 
others as Trachelobdella). 
(2) Four pairs of non-respiratory vesicles 
on the preclitellum. 
(3) Preclitellum of 9 annuli (not so 
stated). 
Parasitology vn 
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