PLATE 7 

 Explanation of figures 



42 Section of a larva, Stage XII. The plane is shown a dotted line a-a 

 (fig. 36). X 50. 



43 Transsection through the posterior portion of the olfactory bulbs, 13 mm. 

 larva. X 50. 



44 Transsection just cephalic to the interventricular foramina, 13 mm. larva. 

 X 50. 



45 Transsection through the posterior poles of the cerebral hemispheres, 13 

 mm. larva. X 50. 



46 Transsection through the mesencephalon and hypothalamus, 13 mm. larva. 

 X 50. 



47 Transsection through the cerebellum and posterior portion of the mid- 

 brain, 13 mm. larva. X 50. 



48 Transsection through the olfactory bulb, 23 mm. larva. X 50. 



49 Transsection just cephalic to the interventricular foramina, 23 mm. larva. 

 X 50. 



50 Transsection at the level of the anterior commissure, 23 mm. larva. 

 X 50. 



51 Transsection through the habenulae and j^osterior poles of the cerebral 

 hemispheres, 23 mm. larva. X 50. 



52 Transsection through the mid-region of the mesencephalon, 23 mm. larva. 

 X 50. 



REFERENCES 



a. c, anterior commissure 



chl., cerebellum 



cbl. c, cerebellar commissure 



fi. lal., fissura lateralis 



hb., habenula 



hip. c, hippocampal comtoissure 



I. rec, lateral recess 



I. v., lateral ventricle 



olf. n., olfactory nerve 



op. s., optic stalk 



par., paraphysis 



/;. hip., primordium hippocampi 



p. po., polus posterior 



pr. r., preoptic recess 



s. c, superior commissure 



s. d., sulcus diencephalicus dorsalis 



s. ep., septum ependymale 



.s. /., sulcus limitans 



s. m., sulcus diencei)halicus medius 



.s/., striatum 



.s. v., sulcus diencephalicus ventralis 



tel. pi., telencephalic plexus 



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