Galloway, Budding in Dero vaga. 217 



LITERATURE. 



1. Cohnheim. — Virchow's Archiv, Bd. xxxviii, 1867. 



2. A. S. Dogiel. — Die Nerven der Cornea des Menschen. Anatomischer 

 Anzeiger, No. 16 and 17, Jahrg. 1S90. 



3. A. S. Dogiel — Die Nervenendkorperschen (Endkolben W. Krause) in 

 der Cornea und Conjunctina bulbi des Menschen. Archiv f. Mik. Anat., Bd. 

 37, P. 602, 1891. 



4. S. Apathy.— Zeit. f. Wiss. Mik, Bd. ix, P. 30, 1892. 



5. Bethe. — Archiv f. Mik. Anat., xliv, 1895. 



6. Emil Ballowitz. — Die Nervenendungen der Pigmentzellen. Zeit. f. 

 Wissen. Zoologie, Bd. Ivi, Hft. 4, P. 673, 1893. 



7. E. Klein. — Termination of Nerves of Mammalian Cornea. Quart. Jour. 

 Micr. Sci., Vol. XX, 1880, P. 464. 



Some Nervous Changes Accompanying Budding in Dero 



VAGA. 



By T. W. Galloway. 



(Abstract from Paper on Non-Sexual Reproduction in Dero Vaga.') 



In Dero, as in several other Naidiform OHgochaeta, budding 

 is a common method of reproduction. The process, occurring 

 wholly within a single body segment, involves the formation, 

 from the segment, of appropriate tail parts for the anterior 

 zooid, and of the head structures of the posterior one. In the 

 latter case the new formations consist of the prostomium and 

 four cephalic segments, together with their contained structures: 

 pharynx ; ventral bristle-bundles ; muscles ; blood-vessels ; and 

 nervous structures, namely, the brain, ventral cord, circum- 

 oesophageal ring, and certain small visceral ganglia, sometimes 

 denominated "sympathetic," In the anterior individual, an 

 anal or pavilion segment, bearing the branchial apparatus and 

 digitiform appendages, and a preanal zone, which is concerned 

 in the formation of new segments, are produced from the ante- 

 rior portion of the bud-zone. 



' Similar investigations have been made with essentially similar results, by 

 Max v. Bock for Chaetogaster diaphanus. 



