1864.] DR. J. E. GRAY ON THE TRIONYCHID2. 95 
1. CYCLANOSTEUS SENEGALENSIS. (Skull, figs. 16, 17, 18.) 
Cyclanosteus petersii, Gray, Cat. Shield Rept. 64, t. 29; Proc. 
Zool. Soc. 1860, p. 315. 
Cyclanosteus (Cyclanorbis) petersii, Gray, P. Z.S. 1852, p. 133; 
Ann. & Mag. N. H. xv. 69. 
Jun. Emyda senegalensis, Gray, Cat. Tort. B.M. 47 ; Cat. Shield 
Rept. B.M. 64; P.Z. S. 1860, p- 316, 
Fig. 16. 
Fig. 17. Fig. 18. 
; Cyclanosteus senegalensis, jun. 
