Transcriber's Notes
The scale of [Figure 4] and [Figure 5] are preserved from the original, if viewed on a 96 DPI monitor screen and with a browser setting of 100%.
The only changes made to the text are the following:
Page 623 Table 3 column heading: changed "or" to "of" (Number of specimens).
Page 625: changed "percent" to "per cent" (92 per cent of the time).