314 



EDUARD UHLENHUTH. 



which, like in other salamanders 5> 6 - 7> are continuous with the 

 pars anterior and attach themselves to the ventral wall of the 

 infundibulum (Fig. 9). The partes tuberales of Typhlomolge 

 are apparently smaller than in the adult A. opacum and resemble 

 in size the partes tuberales of a larvae of Ambystoma opacum of 

 about 55 mm. total length and showing no signs of metamorpho- 

 sis as yet. The pars intermedia of the amphibians cannot well be 

 discriminated from the anterior part in transverse sections. But 

 from such sections as shown in Fig. 10, it would seem that the 

 dorsal part of the pars intermedia is bilobed, the two lobes being 

 separated by a median antero-posterior space. The pars nervosa, 

 as in other salamanders, consists in a thickening of the wall of the 

 infundibulum where the pars intermedia is attached to it (Fig. 

 10). In comparing the pars nervosa of Typhlomolge with that of 

 other salamanders, Haller's description 7 of the pars nervosa of 

 Proteus angiiinens is of interest. According to this author, the 

 pars nervosa of Proteus is hardly differentiated from the rest of 

 the infundibular wall. In Typhlomolge the pars nervosa is not 

 only well-differentiated, but seems to be larger and moresacculated 

 than is the case in Ambystoma opacum (Fig. 10). Summarizing 



FIG. 10. Transverse section through dorsal regions of hypophysis of Typhlo- 

 molge 7. p.i., pars intermedia; />.., pars nervosa. X 34- 



the description of the hypophysis of Typhlomolge, one may say 

 that it resembles closely the hypophysis of other salamanders. 

 In particular, it does not seem that the hypophysis of this species 

 presents indications of an atrophic state, although, with a larger 

 amount of material at our disposal we might find that the partes 

 tuberales of Typhlomolge are of the size of a larval organ. 



Haller, B., Morph. Jahrb., 1898, XXV., 30. 



7 Haller, B., Arch. Mikr. Anal, und Entwicklgsg., 1909, LXXIV., 812. 



