124 



BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



EXPLANATION OF PLATES. 



All of the figures of sections were drawn with an Abbe camera and represent 

 their anterior faces, so that what appears at tlie left in the figures is really at the 

 right in the animal. 



ABBREVIATIONS. 



ao. . . . 

 cav. glm. . 

 cav. nph^stm. 

 cav. sVglm. 



cl. g. . . 

 coel. . . 

 coel. d. . . 



coel. so. 

 coel. V. . . 



cps. Bow. ex. 

 cps. Bow. I. 



crs.g. . . 

 crs, o'dt. . 

 crv. cp. Mpg. 



dt.l; dt.2 



dt. Muel. . 

 dt. prccoel. 

 dt. Wf. . 

 ec'drm. 



e''coel. . . 

 e'mer. . . 

 evg. 1, 2, 3 



Aorta. 



Glomerular cavity. 



Nephrostomal cavity. 



Subglomerular . cav- 

 ity. 



Germ cell. 



Coelome. 



Dorsal division of 

 body cavity. 



Coelome of somite. 



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 IMalpighian 

 body. 



Ducts from tlie 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. 



fnd. ms^nph. 

 glm. . . 



hp. . . . 



niarg. p. tab. 



ms^drm. I. 

 ms'ent. 

 ms'tner. 

 viij'cm. 

 my'tm. . 

 nph'stm. 

 nphHrn. 

 nt'cd. . 

 pi'cr. . 

 pn. . . 

 pn. -f- par. 



scl'tm. . . 

 su'drm. I. , 



so^drm. t. . 



so. v-L 

 spl'drm. I. 

 spl'drm. t. 



sul. 

 tab. 



. 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 b o d y- 



wall. 

 . Sclerotome. 

 . Somatoderm of the 



lateral mesoderm. 

 . Transverse part of 



the somatic wall of 



the somite. 

 . Ventro-lateral angle 



of somite. 

 . Splanchnoderm of the 



lateral mesoderm. 

 . Transverse part of the 



splanchnic wall of 



somite. 

 . Groove. 

 . "Shelf." 



