84 



K. KTSHTNOUYE. 



Explanation of Plates. 



The figures are all exact representations of preparations, the 

 outlines, the nuclei, and other details being drawn faithfully by my- 

 self with the use of the camera lucida, and they are not diagramatic, 

 except in the case of a few figures expressly so stated. 



List of References. 



(t, first segment of brain. 



((hd. app., abdominal a]i]iendao-o. 



a. I., anal lobe. 



A. L. E., anterior lateral eye. 



ant. mesent., anterior portion of me 



senteron. 

 fe, second segment of brain, 



c, third »» >' >> 

 ceph. /., cephalic lobe. 

 eh., chelicerae. 



ch. g., cheliceral gano-lion. 

 eo. gl., coxal gland. 

 cut., cuticula. 



d, dorsal side. 

 dor., dorsum. 

 ect., ectoderm. 

 end., endoderm. 



/. c, fat cell. 

 G, ganglion. 



inv,, invagination of lung-book. 

 L, lens. 

 lat. v., lateral vesicle. 



Malp. t., Malpio'hian tulto. 



mes., mesoderm. 



N, nerve. 



pedip., pedipalpi. 



P. M. E., ])osterior mediaii eye. 



post, mesent., posterior portion of 



mesent eron. 

 prim, th., primary thickening. 

 proct., proctodasum. 

 B, retina. 



sec. th., secondary thickening-. 

 seg. cav., segmentation cavity. 

 sein, gr., semicircular groove. 

 sp. gl., spinning gland. 

 sterc. p., stercoral pocket. 

 stom., stomodaeum. 

 tci])., tapetum. 



th. app., thoracic appendage. 

 V, ventral side. 

 vit., vitreous body. 

 y. n., yolk nucleus. 



