38 
CHARLES BADHAM. 
17. Leigh- Sharpe, W. H. (1913). — “ Calliobdella lophii, Yan 
Beneden & Hesse,” ‘Journal Marine Biological Assoc.,’ vol. x. 
EXPLANATION OF PLATES 1 and 2, 
Illustrating Mr. 0. Badham’s paper “ On an Ichthyobdellid 
parasitic on the Australian Sand Whiting” (Sillago 
ciliata). 
[All figures refer to Austrobdella translucens.] 
PLATE 3. 
Fig. 1. — Drawing from life. Seen from the ventral aspect by 
transmitted light. The specimen is somewhat extended so that the 
shouldered appearance seen in large individuals (vide fig. 5) is absent. 
The pigment cells (P. c.) are represented and the ejaculatory canals 
( Ej . c.) show up on account of their pigmentation. The five pairs of 
testes (T.) are a marked feature. Certain parts of the Blood- vascular 
System appear, and the thick-walled part of the middle gut stands out 
clearly (M. g.). A. m. g. Caeca of anterior thin-walled part of middle 
gut. C. 1. Contractile lacuna. Cl. gl. Clitellar glands. E. Eye spots. 
Ej. c. Ejaculatory canal. M. g. Caeca of thick-walled part of middle 
gut. Ov. Ovary. P. Proboscis. P. c. Pigment cell. T. Testis. 
V. v. Yentral vessel. 
Fig. 2. — Drawing of the Blood-vascular System from life. The 
dorsal vessel is shaded, the ventral vessel is outlined. The origin of 
the dorsal vessel is seen in the posterior sucker ; just above the union 
of the two branches from the posterior sucker this vessel enters into 
intimate relation with the caeca of the thick-walled intestine to form 
the intestinal sinus (1. s.). After leaving the sinus the dorsal vessel 
(D. v.) has a series of valves (VI.), one being placed where a constriction 
is seen on contraction. Anteriorly, the dorsal vessel gives off two 
pairs of lateral vessels (L. v. 3, L. v. 2) and an impaired proboscis 
branch (P. v. 1), and bifurcates just above the level of the eye spots 
to form the first pair of lateral vessels. The paired lateral branches 
are gathered together to form the ventral vessel (V. v.). This runs 
posteriorly and gives off in the posterior sucker a series of anastomotic 
branches which go to form the ring vessel (B. v.). D. v. Dorsal vessel. 
E. Eye spots. L. v. Lateral vessel. P. v. 1. Afferent proboscis vessel. 
P. v. 2. Efferent proboscis vessel. B.v. Ring vessel. VI. Yalve. 
Figs. 3, 4, 5. — Drawings of alcoholic specimens (fixed in boiling 
corrosive acetic), P5 mm., 4 mm. and 9 mm. long respectively. Fig. 3 
