KMP.lIYnl.ocy OF TIIK Lo\YKK VEKTEBRATES m. vi 



McClure. An.it. l{v..nl. ix. 1915. 



Maurer. Morj.h. .lalnl>., xiv. 1888. 



Mollier. Hcrt\\ i^s Handlim-h d.-r Entwicklungslehre, i, 1906. 



Miiller. Abhand. Akad. Wi. li. rlin. 1845. 



Miiller, F. W. Arcli. niikr. Anat., xlix, 1897. 



O'Donoghue. Pnu . Zool. Soc. Loud., 1912. 



Purser, (^uart. .lourn. Micr. Sri.. Ixii. 1917. 



Rabl, C. Lt-iu-karts Frstsi-hrift. Lci).xi^. 1892. 



Rabl, H. Arch, niikr. Anat., Ixix, 1907. 



Ridewood. Pioo. /ool. Soc. Loud., 1899. 



Robertson. Ouart. .lourn. Micr. Sci.. lix. 1913. 



Rose. .Mtn-])h. .I.ilirl... xvi, 1890. 



Ruckert. Biol. Centralblatt, viii, 1888. 



Riickert. Hcrt \vi^s Handlmch dcr Kntwicklungslelire, i. 1906. 



