124 



BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



EXPLANATION OF PLATES. 



All of tlie figures of sections were drawn with an Abbe' 

 their anterior faces, so that what appears at the left in the 

 riglit in the animal. 



ABBREVIATIONS. 



ao Aorta. 



cav. glm. . 

 cav. njih'stm. 

 cav. sb'glm. 



cl.g. 



Glomerular cavity. 



Nephrostomal cavity. 



Subglomerular cav- 

 ity. 



Germ cell. 



coel Coelome. 



coel. d Dorsal division of 



body cavity. 

 coel. so. ... Coelome of somite. 



coel. V Ventral division of 



body cavity. 



Outer wall of Bow- 

 man's capsule. 



Inner wall of Bow- 

 man's capsule, 

 which forms the 

 glomerular cover- 

 ing. 



Germinal ridge. 



Oviducal welt. 



Neck of Malpighian 

 body. 



Ducts from the first 

 and second Miiller- 

 ian evaginations. 



Miillerian duct. 



Precoelomic duct. 



Wolffian duct. 



Ectoderm. 



Epicoelome. 



Epimer. 



First, second, and 

 third M ii 1 1 e r i a n 

 evaginations. 



cps. Bow. ex. 

 cps. Bow. i. 



crs. g. . . 

 crs, o'dt. , 

 crv. cp. Mpg 



dt.l; dt.2 



dt. Muel. . 

 dt. precoel. 

 dt. Wf. . 

 ec'drm. 

 e^coel. . 

 e'mer. . . 

 evg. 1, 2, 3 



fnd. ms'nph. 

 glm. . . 



hp. . . . 

 niarg. p. tab. 



ms'drm. I. 

 ins'ent. 

 ms'mer. 

 my'cm. 

 vv/tiii. . 

 nph'stm. 

 npJi'tm. 

 nt'cd, . 

 pi'cr. . 

 pn. . 

 pn. + par. 



scl'tm. . 

 su'drm. I. 



so'drm. t. 



v-L 



spl'drm. I 

 spl'drm. t 



sul. 



tab. 



camera and represent 

 figures is really at the 



Fundament of meso- 

 nephros. 



Glomus or glomeru- 

 lus. 



Liver. 



Posterior margin of 

 the " shelf." 



Lateral mesoderm. 



Mesentery. 



Mesomer. 



Myocomma. 



Myotome. 



Nephrostome. 



Nephrotome. 



Notochord. 



Pericardium. » 



Lung. 



Fusion of lung with 

 the lateral body- 

 wall. 



Sclerotome. 



Somatoderm of the 

 lateral mesoderm. 



Transverse part of 

 the somatic wall of 

 the somite. 



Ventro-lateral angle 

 of somite. 



Spianchnoderm of the 

 lateral mesoderm. 



Transverse part of the 

 splanchnic wall of 

 somite. 



Groove. 



" Shelf." 



