ANATOMY OF CACOPUS SYSTOMA. 



555 



these respects Cacopus systoma also agrees with the three genera 

 described by him. Nevertheless, in the details of the second 

 feature mentioned there is hardly any striking resemblance. I 

 should add that the omo-hyoid muscle is generally absent among 

 the same family, as it has not been found either in this toad or 

 in Breviceps and Bemisics. 



9. Key-list of certain of the Abbreviations mostly unexplained 

 in the explanations to Text-Figures. 



A.C. — Anterior cornu. 



A.H. — Articular head for the lower jaw. 



C.P. — A cartilaginous part of the 



mentomeckelian. 

 C.S. — Cartilaginous epiphysis of the 



sacrum. 

 'C.S.' — Coccygeo-sacralis, 

 C.I. — Coccygeo-iliacus, 

 Ex.0. — Ex-occipital. 

 Fr.P. — Fronto-parietal. 

 I.G. — Inner division of a genio-hyoideus. 

 I.L. — Ilio-lumharis. 

 L.D. — Loiigissimus-dorsi. 

 M.— Maxilla. 

 M.M. — Mentomeckelian. 

 Na. — Nasal. 



O.C. — Occipital conil3'le. 

 O.C.H. — " Os-capitato-hamatum." 

 O.E. — O h liquus-externus. 

 O.G. — Outer division of a genio- 



Jiyoidetis. 

 O.I. — Ohliquus-internus, 

 O.L. — "Os lunatum." 

 O.N. — "Os naviculare" of a manus. 

 O.P. — " Os pyramidale." 

 O.T. — " Os trapezium." 

 O.Ts. — " Os trapezoides." 

 Pr . — Pterygoid . 



P.A. — Petrohyoideus-anterior. 



P.A.' — Inner division of a portio- 



abdominis. 

 P.A." — Outer division of the same, 

 P.M.— Premaxilla. 

 P.P. — Petrohyo ideus-^osterior, 

 Pro.O.— Pro-otic. 

 P.S. — Parasphenoid. 

 Q. — Quadrato-jugal. 

 R.A.' — Inner division of a rectus-abdo- 



minis. 

 R.A." — Outer division of the same. 

 SQ. — Squamosal. 

 ST. — " Outer portion of the sterno- 



hyoideus " or the sterno- 



hyoideus proper. 

 ST. 1 and ST. 2. — Two divisions of the 



same. 

 ST. I. — An inner portion of the sterno- 



hyoideus. 

 S.H. — " Sub-hyoideus." 

 S.M. — Sub-maxillaris. 

 S.M.' — Sub-mentalis. 

 T.— Tongue. 



T.' — Terminal epiphysis of the urostyle. 

 V. — Vomer. 

 X. — Xiphisternal plate. 



10. References to Literature. 



1. Beddard, F. E. (1^08). — -' On the Musculature and other 



points in the Anatomy of the Engystomatid Frog, 

 Breviceps verrucosus." Proc. Zool. Soc. 1908, p. 11. 



,, (1908). — " A Contribution to the Knowledge of the 



Batrachian, Bhinoderma darwini." Proc. Zool. 

 Soc. 1908, p. 678. 



,, (1908). — " Some notes on the Muscular and Visceral 



Anatomy of the Batrachian Genus Hemisus., with 

 notes on the Lymph-Hearts of this and other 

 Genera." Proc. Zool. Soc. 1908, p. 894. 



2. BoULENGER, G. A. (1890).— " Reptilia and Batrachia" in 'The 



Fauna of British India.' 



3. BouLENGER, 0. L. (1910). — "On certain Sub-cutaneous Fat- 



Bodies in Toads of the Genus Bufo.'" Proc. Zool. 

 Soc. 1910, p. 379. 



