. Bulletin of the British Museum (Natural History) Zoology. \ I I i I \ S I I \ ( . s the median lh* in several longitudinal series, and there are no sutures or I iterally there are Longitudinal ridges, and the extension and thickening of tl d calcification forms the striated thickening which gradually obliterates the original frontal wall and transforms the appearance of the older parts of the nveloping the branches. The pores are continued upwards as oblique tubes in this thickening, the oblique transection of the tubes and the wall giving the appearance of oval or elongate pores (Text-fig.
. Bulletin of the British Museum (Natural History) Zoology. \ I I i I \ S I I \ ( . s the median lh* in several longitudinal series, and there are no sutures or I iterally there are Longitudinal ridges, and the extension and thickening of tl d calcification forms the striated thickening which gradually obliterates the original frontal wall and transforms the appearance of the older parts of the nveloping the branches. The pores are continued upwards as oblique tubes in this thickening, the oblique transection of the tubes and the wall giving the appearance of oval or elongate pores (Text-fig. ia). In S. papillatus it is the develop-. i eg i 0 50mm Scale for fig AC iti*I s papillatus Zooecia near the growing point forcompari I th«ir cl before obliteration of the primary walla by secondary developments. i. i S papillatus, , Siboga collecj i'. 1- the large avicuiarium win- b 1- seen obliquely in 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Farn, Alexander E. London : Butterworths
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