BRAIN AND CRANIAL NERVES OF BDELLOSTOMA DOMBEYI. 177 
spinal nerve. ‘This branch runs dorso-cephalad until it 
reaches the top of the sheath, then mediad to the median 
line, and straight dorsad to the skin. On reaching the 
skin it runs cephalad, running near the median line, 
and supplying the skin until its twigs finally disappear 
near the end of acusticus b. The sensory nerve coming 
from the lateral branch is the one joined by the motor trunk, 
and the united nerve runs straight laterad beneath the 
dorsal body muscles. Several strong twigs, representing 
together Fiirbringer’s dorso-motor branch, penetrate this 
muscle and ramify inside it, while the ventral branch, motor 
and sensory combined, corresponding to the two spino- 
occipital nerves that have preceded the first. spinal nerve, 
takes its way down the body wall on the inner face of the 
lateral longitudinal muscle. 
LITERATURE CONSULTED. 
1889. Ayers, Howarp.—“ The Morphology of the Carotids,” ‘ Bull. of the 
Museum of Com. Zool. at Harvard College,’ vol. xvi, No. 5. 
1900. Ayers, Howarp, and Jackson, C. M.—‘ Morphology of the Myxi- 
noidei,” ‘Bull. of the University of Cincinnati,’ October and 
December. 
1900. Bowrrs, Mary A.—“ Peripheral Distribution of the Cranial Nerves 
of Spelerpes bilineatus,” ‘American Academy of Arts and 
Sciences,’ vol. xxxvi, No. 11. 
1899. Cuapp, Cornetia Maria.—‘ The Lateral Line System of Batrachus 
tau,’ Ginn and Co., Boston. 
1902. Cognit, G. H.—* The Cranial Nerves of Amblystoma tigrinum,” 
‘Journ. of Comp. Neurology,’ vol. xii, No. 3. 
1896. Cony, Frank J.—‘‘ The Cranial Nerves of Chimera monstrosa,” 
‘ Proceedings of the Royal Society of Edinburgh.’ 
1896. Coz, Franx J.— Reflections on the Cranial Nerves and Sense Organs 
of Fishes,” ‘Transactions of the Liverpool Biological Society,’ 
vol. xii. 
1898. Corn, Frank J.—‘‘ The Peripheral Distribution of the Cranial Nerves 
of Ammocestes.”’ ‘ Anatomischer Anzeiger,’ Band xv. 
