314 
A New Trematode 
most important character in this case is the formation of numerous peritoneal 
adhesions which have not been hitherto mentioned in the literature in con¬ 
nection with the inflammatory reactions in fishes taking place around a parasitic 
cyst. It is interesting to note that we have not found the accumulations of 
eosinophile cells which are so frequently observed in similar conditions in 
higher vertebrates. It may be concluded that in our case a specially strong 
inflammatory irritant was present. As such we may consider (1) a very large 
number of cysts of Tetracotyle sogdiana in the pancreas, (2) products of de¬ 
composition of the gland, or finally (3) a secondary infection conveyed by the 
parasite from the intestine of the host itself. 
REFERENCES. 
Eberhard (1907). On the cellular elements of the blood and connective tissue in the turtle. 
Dissertation. Petrograd. (In Russian.) 
Luhe, M. (1909). Parasitische Plattwurmer. 1. Trematoden. Die Siisswasserfauna Deutsch- 
lands. Heft 17. 
Maximow, A. (1906). Ueber entziindliche Bindegewebsneubildung beim Axolotl. Ziegler's 
Beitr. z. Pathol. Anat. u. Allg. Pathol, xxxix. 
EXPLANATION OF PLATE XXV. 
Fig. 1. The abdominal organs of Schizothorax intermedins on the inferior wall of which a dark 
patch with whitish dots is seen; fibres of pseudo-adhesions run from the patch to the pig¬ 
mented peritoneum. 
Fig. 2. Tetracotyle sogdiana —general view. 
Fig. 3. The same—longitudinal, slightly oblique section, b., ventral sucker; cd., cyst gland. 
Fig. 4. The same—part of longitudinal section. Both anterior (a.) and ventral (6.) suckers visible. 
Fig. 5. The same. Surface section through anterior sucker (a.) and through cyst glands (cd.). 
Fig. 6. The same. Longitudinal section through cyst gland; glandular cells (cd.) and common 
duct in the form of a biramous invagination. 
Fig. 7. Schizothorax intermedins. Section through pancreas (p.) between the lobules of which 
the cysts are disposed (the parasites are not figured). 
Fig. 8. The cyst wall of T. sogdiana. a., homogeneous layers of the cyst; b., layer composed of 
broken-up cell elements; c., layers of fibrous tissue around the cyst of Tetracotyle; d., outer 
portion of the layer c. more fibrous; e., areolar laminar connective tissue with pigment cells. 
