Pr.ATR 44. 

 Fic. 1. Luuliii (iri< iitdlis : imrlidii <>l' nlmcl iiuil snrfncc of vny, ciilnrucil, ]i. Kill. 

 2. Liiiiliii (I riciildiid ; |i(irli(Hi of .■ilincl iiinl snrf.-K-c (if r:iy. t'lihir^cd. ji. ITli. 

 o. I.uldid dioioisoinid : jKirlion of \;\\ of :i siicciiiicii from .hipnii. for coiu- 



purisou with L. (iriiiddiid (ti.^. 2) : (Milar,ij:ed, p. 175. 



4. Ltiidid !/j/iii>i<>c]i(trd ; portion of ;il);i(tiii;il sui'f;ice of ray, t'lilar^cd. ]i. ITo. 



5. SiUiu' ; ouc-liaif of an ciilai^rd \ lew of aiiinal surface of ray: fiirllici' 



on tlio ri.Liht. 



159 



