220 MR. F. E. BEDDARD ON THE [Feb. 1, 



Plate XXIX. 

 Herpetocypris chevreuani. 



Figs. 1, 2. Shell seen lateral!}' and dorsally, X 20. 



3. Posterior antenna, X 84. 



4. „ maxilla, X 84. 



5. Tooth of anterior maxilla, X 300. 



6. End of foot of second pair, X 240. 



7. Caudal ramus, X 120. 



7 a, Marginal spines of same, X 240. 



Ilyodromus olivaceus. 



Fig. 8. Posterior antenna, X 120. 

 9. Foot of first pair, X 84. 



10. „ second pair, end, X 210. 



11. Caudal ramus, X 84. 



Ilyodromus robertsoni. 

 Fig. 12. Posterior maxilla, X 200. 



Plate XXX. 



Fig. 1. Shell of Candona angulata with encysted trematodes. 

 2-4. Cysts of the ahove in various stages of development. 

 5. Neorhynchus (? claviceps Zad.). 



P. Proboscis. L. Lemnisci. S.C.L. Subcuticular layer. R. Retractor of pro- 

 boscis. G.N. Giant nucleus. T. Testis. V.D. Vas deferens. G. Glands. 

 G.P. Genital pore. 



5. A Contribution to the Anatomy of Hippopotamus am- 

 phibius. By Frank E. Beddard, M.A., F.R.S., F.Z.S., 

 Prosector to the Society. 



[Received January 18, 1910.] 



(Text-figures 22-25.) 



Our knowledge of the anatomy of this animal so far as the 

 viscera are concerned is due principally to the great work of 

 Gratiolet *, and to shorter and more recent memoirs by Crisp t, 

 Clark t, Garrod §, Flower ||, Alix % Chapman **, Weber ft, 

 Peters i% as well as to Dr. Macalister's §§ memoir upon the 

 Liberian Hippopotamus. 



* Recherches sur l'Anatomie de l'Hippopotame. Ed. by Alix. Paris, 1867. 



f " On some Points connected with the Anatomy of the Hippopotamus," P. Z. S. 

 1867, p. 601. 



t " Notes on the Visceral Anatomy of the Hippopotamus," P. Z. S. 1872, p. 185. 



§ "On the Brain and other parts of the Hippopotamus," Trans. Zool. Soc. xi. 

 p. 11. 



II "Lectures on the Digestive Organs of Mammals," Med. Times & Gazette, 1872. 



if "Sur la Glande lacrymale de l'Hippopotame, " Bull. Soc. Philom. Paris (7) iii. 

 1879, p. 146. " Sur le Plexus cervicale," ib. p. 167. " Sur le Glande Sympathique 

 de l'Hippopotame," ib. p. 168. " Sur la Glande lacrymale de l'Hippopotame," Bull. 

 Soc. Zool. Fr. iv. 1879, p. 117. 



** " Observations upon the Hippopotamus," P. Acad. Philad. 1881, p. 126. 



ft Studien fiber Saugethiere : i. Beitrage ztir Anatomie von Hippopotamus amplii- 

 bins. Jena, 1886. 



XX Bi ' Reisc nach Mossambique,' Safigethiere, 1852, p. 180. 



§§ " The Anatomy of Chccropus liber iensis," P. Roy. Irish Acad. (2) i. 1874, p. 496. 



