X Journal of. Comparative Neurology. 



ganglion habenulae and derives its fibres, (i) from die fornix and the 

 Ammonshorn ; (2) from the basal part of the third ventricle, from the 

 regio supra-optica, where the fibres in question arise in a large ganglion 

 which is connected with the nidus of the basal bundle of Ganser ; (3) 

 from the stratum zonale of the thalamus ; (4) from the interior of the 

 thalamus. The stria thins out from before backward and behind passes 

 over into the commissure of the pineal, from which a small number of 

 fibres enters into the pineal. This commissure is a union of the 

 habenulae. 



Fasciculus longitudinalis dorsalis of KoUiker. The so-called dorso- 

 median fasciculus ends in the mammals cephalad of the nidus III in 

 ascending fibres which in part form a commissure, in part apply them- 

 selves to the medullary zone on the medial side of the nidus ruber. 

 A nidus of this bundle such as was found by Van Gehuchten in fishes 

 cannot be demonstrated in the mammals. 



c. J. H, 



The Lateral Line System of Amphibia.^ 



Dr. Kingsbury has performed a service which will be appreciated 

 by many students in several departments of research in mapping the 

 exact distribution of the lateral hne organs of many of our types of 

 tailed Amphibia, as well as of some of the allied forms. Descriptions 

 and figures of the following species are given, Necturus maculatus, 

 Amblystoma puncfatum, Protopterus anneciens, Ainphiuma tneafis, Gyrin- 

 ophilus porphynticus, Dicmyctylus viridescens, Siren, Rana, Cryptobranch- 

 us allege he niensis, Lepidosiren paradoxa, as well as comparisons with 

 several other types. The histology of the neuromasts ( Nervenhiigel ) 

 is briefly discussed. We quote a few paragraphs. 



"The Amphibia afford in certain respects peculiar opportunities 

 for the study of a sensory system associated with existence in the water. 

 This is due to the fact that there are here included forms purely aquatic 

 •and forms as purely terrestrial in their habits of life, and yet others 

 which spend a portion of their life in the water and a portion of it on 

 land. In every family of the tailed Amphibia native in the United 

 States the system has been found, and in five famihes of the tailless 

 Amphibia. Since Malbranc has found the sense organs in a larval 

 Pipa, and Leydig in a larva of the viviparous Salamandra atra taken 

 from the oviduct of the mother, doubtless the system will be found in 



1 Kingsbury, B. F. The Lateral Line System of Sense Organs in some 

 Amphibia, and Comparison with the Dipnoans. Trans. Am. Microscopical Soci^ 

 ety, XVII, 1896. 



