388 The Ohio Naturalist. [Vol. Ill, No. 5. 



M. Rectus Abdominis. — (Plate ii, Fig. i, mra. ) The 

 sternohyoideiis muscle, already described, is a continuation of M. 

 rectus abdominis. As the muscle runs back, it becomes more and 

 more flattened, until it presents the typical aspect of a thin sheet 

 of tissue lining the ventral body wall. In this specimen it pre- 

 sents no unusual characteristics. 



MUSCLES OF THE EYE. 



No well defined musculature for the eye was found, Init two 

 recti muscles, or traces of them, could be distinguished. They 

 are very small, and while their insertion on the eyeball can be 

 seen plainly, their origin is lost in the surrounding mesoderm. 



bibeiography. 



Journal of Comparative Neurology — 



Volume IV, page 7 — " Glands and Nerve-endings in the Skin of the Tad- 

 pole."—/. //. Massic. 

 Volume IV, page 117 — "The Nose and Jacobson's Organ with especial 



reference to Amphibia." — H. H. Boivdcn. 

 Volume IV, page 193 — " The Cranial Nerves of Amblystomapunctatuni." 



— C. Judson Herri ck. 

 Volume VI, page 45 — "Preliminary Notes on the Cranial Nerves of 



Cryptobranchus allegheniensis."— y. H. McCirci^or. 

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Amphibia."—/. .S". Kiiigslcv. 

 Volume VII, page 146 — " Preliminary Notice upon the Cytology of the 



Brains of some Amphibians." — S. E. Jcllijfc. 

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Nervous System in Bull-frogs of different Sizes. ' ' — //. //. Doua/iisoii . 

 Volume IX, page 53 — "Nerve Termini in the Skin of the Common 



Frog."— 6". E. Coo/n7/. 



American Naturalist — Volume XXXIII, page 231 — " Desmognathous 

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Thesis, Ohio State University — "Osteology and Myology of Crypto- 

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Journal of Morphology — 



Volume II, page 297 — "On the Relations of the Hyoid and Otic Ele- 

 ments of the Skeleton in the Batrachia." — /:. D. Cope. 



Volume VII, page 189 — "The Development of the Optic Vesicles in 

 Amphibia." — A. C. Eeleshymer. 



Volume VII, page 23 — " Studies on the Development of the Ear in 

 Amblystoma." — H. IT. \o/yis. 



Volume X, page loi — "The Cranial Nerves of Amphibia." — O. S. S/roz/g. 



Volume X, page 231 — "The Central Nervous System of Desmognathous 

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" The Frog." — Ecker. 



" Verte1)rate Embryology." — .lAr/.v/zfc//. 



" Manual of Vertebrates."— /wcA?;/. 



Journal of the Philadelphia Ac.\dkmy -Volume I, page 2S7. — /laird. 

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Proceedings Academy Philadelphia. 1S69— Page 107. — Cope. 

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 " Batrachia of North America."— Cc^/t'. 



