488 
J. GEAHAM KERR. 
reduced, and this part of the gut no longer bulges con- 
spicuously. The spiral valve is now indicated by a deep 
Text-fig. .3 A. Text-fig. 3 b. 
Text-figs. 3 a, b, c, d.^ — Dissection of young Lepidosirens of stages 
XXXII, XXXV, XXXVI, and XXXVII, from the ventral side, 
illustrating the development of the alimentary canal, g. b. Gall 
bladder, ht. Heart. 1. a. Left auricle, li. Liver, pc. Pericardium. 
r. a. Eight auricle. 
“ incision,” which traverses the mid-gut right to its anterior 
end, but is absent for a short distance posteriorly. 
