456 Dr. J. Waterston on the occurrence., near London,, 



On closer examination, however, it became apparent that 

 the upper end had been shortly bitten off, the piece removed 

 having been partially replaced by some extraneous matter. 

 When this had been cleared away sharp teeth marks were 

 plainly visible. It was also evident that the space within 

 the seed walls was fully occupied. 



A needle was inserted at the point c (upper figure) and 

 pTished down tov/a.rds the micropyle, keeping close to the 



Fig. 2. — Hawthorn stone in whicli a ^J of Ceratophyllus vaga- 

 biindiis Boh. occiirrerh The upper figure shows the upper end of 

 the stone with marks of incisor teeth, a. left, b. right half, m. 

 micropyle, c, needle cut, /. fractured surface, s, portion of larval 

 skin. 



inner wall of the right-hand side {h) of the stone. About 

 two-thirds on the way to the microj^yle, the needle point, 

 released by the curvature of the surface traversed, im- 

 pinged suddenly on the opposite side (a), from which a 

 fragment (/) shot off and was lost. The stone at tlie same 

 time fell apart in two halves, the left (a) being clean, while 

 a large composite mass filled the right side (6). 



The occlusion, where the needle had been inserted, was 

 now seen to consist of a brown-papery layer. 



