1024 



MR. L. R. CRAWSHAY ON THE ARTERIAL 



[Dec. 11, 



not from the Aa. ovaricce, otherwise fi'om the^l. mesenterica inferior 

 {R. hexaclactyla),ov from the A. epigastrico-vesicalis [R.esctdenta); 

 the details being ns follows : — 



R. hexadactyla : fi-om the first renalis on one side, and from 

 the last renalis and the mesenterica inferior on both sides. 

 B. horeas : from the first two renales on one side, and the 



fifth renalis on both sides. 

 R. esculenta : fi'om the second a.nd last renales and the 

 epigastrico-vesicalis on both sides. 



The fat-bodies, as observed in three species only, were supplied 

 by branches from the first urogenital pair and, except on one 

 side in R. temporaria, direct from a genital vessel. In this 

 exception thei'e was no genital vessel on this side, and the artery 

 arose fi-om a renal vessel. 



Text-fia-. 150. 



Hana esculenta, ? ( X If). 



Ventral view of Aa. urogenitales, &c. 



Showing abnormal development of Aa. ovaricce. 



(For explanation of the lettering-, see p. 1033.) 



In the single individual examined of R. esculenta (text-fig. 150) 

 the condition of the ^4 a. ovaricce was very remai'kable. They arose 



