666 



ON AN ABNORMAL SKULL OF SPHENODON. [June 15, 



on the upper border of the larger chela, there being here; no 

 transverse groove, by the stouter shape of the smaller chela, by 

 tlie dactyli of the 3rd and following legs being armed with two 

 accessory claws, etc. 



EXPLANATION OF PLATE LXX. 



Alpheiis ehlersii. 



Fig. 1. Frontal and antennal region of the larger specimen, X 23. 



Fig. 2. Telson ofthe same, X 23. 



Fig. 3. Larger chela and carpus of the larger specimen Jooked at trom the inner 



side, X 8i. 

 Fig. 4. Smaller chelipede of the same, X ^\- 

 Fig. 5. Second leg ofthe younger specimen, X 11. 

 Fig. 6. Fifth leg of the larger specimen, X 23. 



June 15, 1909. 



Dr. A. Smith Woodward, F.R.S., Vice-President, 

 in the Chair. 



Mr. H. W. Unthank, F.Z.S., exhibited a skull of Sphenodon 

 with two bones on each side in the nasal region, and made the 



Text-fig. 214. 



Sphenodon skull with abnormal nasal region. 



a. Left median bone in nasal region. 



b. Left external bone in nasal region. 



following remarks : — " In place of the usual sipgle nasal on each 

 side there appear to be two bones, one near the median line, the 

 other more external, the line of division running from before 



