EXPLANATION OF PLATE VII. 
In all figures Roman numerals refer to the somites. 
Fig. I 
Fig. 2 
Fig. 3 
Fig. 4 
Fig. 5 
Fig. 6 
Fig. 7 
Fig. 8 
Fig. 9 
Fig. 10 
Fig. II 
Fig. 12 
-Myxobdella annandalei, n. g., n. sp. Diagram showing the annulation 
of the anterior region. 
Ditto. Diagram showing the annulation of the pos- 
terior region. 
Ditto. Anterior extremity. Ventral view, x 5. 
Ditto. Three somites from the middle region. Dorsal 
view. X5. 
Ditto. Entire animal. Ventral view. Nat. size. 
-Hemiclepsis siamensis, n. sp. A typical somite from the middle region 
(somite X VIII). x 15. 
Ditto. Posterior extremity. Dorsal view, x 15. 
Ditto. Anterior extremity. Dorsal view, x 15. 
-Ancyrobdella hiwae, n. g., n. sp. Anterior extremity with proboscis. 
Side view, x 25. 
Ditto. 
Ditto. 
Ditto. 
Posterior extremity. Side view. X25. 
Entire animal (specimen no. 2). x 2. 
Diagram showing some of internal organs, s one of 
gastric coeca, t testis (3rd pair), c nephridial cap- 
sule (4th pair). 
