122 Dr. W. C. Williamson on ^ 



Parichnos. 



BB. — Longitudinal, p. 21, Fig. 3igg, C.N. 1955, Fig. 32gg', C.N. 1956 

 p. 21, Fig. 34g, C.N. 1963. 

 p. 22, Fig. 35gg, C.N. 1946. 



BB. — Transverse, p. 22, Fig. 36g' C.N. 1971 

 p. 22, Fig. 37gg, C.N. 1973. 



Leaf-Trace. 



BB. — Transverse, p. 22, Fig. 36c, C.N. 1971, Fig. 37c, C.N. 1973. 

 Oblique, p. 21, Fig, 32c, C.N. 1956. 



Longitudinal, p, 21, Fig. 31c, C.N. 1955, Fig. 33c, C.N. 1962. 

 p. 23, Fig. 35c, C.N. 1946, Fig. 38c. C.N. 1957. 



Adenoid Organ. 



Transverse, p. 22, Fig. 37h, C.N. 1973. 

 Longitudinal, p. 22, Fig. 33h, CN. 1962. 



Fructigerous Tubercles, 



Transverse, p. 23, Fig. 39, C.N, 1976. 

 p. 23, Fig. 40, C.N. 645D. 



HALONIA & ULODENDRON. 



It has long been obvious that these two terms represent 

 objects that have no claim to generic rank. They are 

 merely fructigerous branches of other genera. 



For a detailed account of them, see Memoir XIX. 

 (BB.)pp. 13, 14, 16, 17. 



BB. — p. 16, Fig. 23. A Halonial branch of large dimensions, and in a 

 very advanced stage of growth, but retaining the form which 

 it assumed when a very young twig. Museum of the Owens 

 College, Manchester. 



BB. — p. 14, Fig. 24. A rather younger Halonial branch, with the 

 cortex A preserved on the side A embedded in the sandstone 

 matrix. 



BB. — p. 14, Fig. 22. A young decorticated Halonial branch with the 

 rows of tubercles C arranged in two opposite rows as in most of 

 the Ulodendroid forms. C.N- 649A. 



BB. — p. 14, Fig. 25 A. Part of a branch of a Lepidophloios with the 

 Ulodendroid fructigerous scars and tubercles arranged, like the 

 smiilar tubercles of some Halonial forms in numerous vertical 

 rows and in close mutual contact. C,N. 649B. 



LEPIDOSTROBI. 



Some of those figured in Memoir XIX. have already 

 been referred to in connection with the types to which they 



