A re-examination of Professor Haswell's types of Australian Pycnogonida

Diagnostic methods in the case of the interesting group of Pycnogonida have so far altered in the last thirty vears, that it needs no apology on my part for attempting a revision of the descriptions of Australian Pycnogonida published by Professor Haswell in the early eighties.
This revision has been made possible by the courtesy of the trustees and curator of the Australian Museum, who placed the holotypes at my disposal, and to whom I tender my best thanks. I have also to thank Professor S. J. Johnston of Sydney for the loan of other specimens collected for the use of his department.
In the following description the specimens from the Australian Museum are indicated by the collection number.
It is necessary to state that the holotypes have been preserved as microscope slides, and while this is a convenient method of preservation it has its disadvantages in the case of subsequent examinations. It is sometimes impossible, for example, to make out with any degree of certainty the arrangement and structure of the spines of the ovigers or even of its joints when, as is often the case, it is tucked under the body of the Pycnogonid on a microscope slide. Further, while every care has been taken with the measurements it must be remembered that the flattening of the specimen necessary in preparing a microscopic slide, alters very definitely the relation of breadth to length.