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FREDERICK TILNEY AND LUTHER F. WARREN 



2. Cistudo europaea. Bojanus ('19). 36 This author first 

 described the epiphysis in this form as a short, pediculated struc- 

 ure with a dilated extremity which was flexed forward. Faivre 115 

 in 1857 describes it as a conical body containing small particles of 

 calcium phosphate. Herrick 176 in 1891 defined it as a lobulated 

 sac attached to the roof of the brain. The distal portion is non- 

 vascular. Sorensen ('93), 361 reconstructed the pineal organ in 

 this form (fig. 71). 



Fig. 69 The epiphyseal complex in a young Tropidonotus natrix, according 

 to Leydig, 1897. 



3. Aspidonectes spinifer. Herrick ('9 1). 176 In this species 

 the epiphysis has the form of a tubular structure arching for- 

 ward. Its lumen opens into the ventricle through a short stalk. 



4. Chelydra serpentina. Humphrey ('94). 19 The embryo 

 of this species has the same form as the saurians. In the early 

 stages it is a dilated sac connected with the third ventricle by a 

 short stalk. Later this stalk becomes hollow and in adults it 

 shows lobulation. 



