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PYCNOGONIDA. 
BY W. T. CALMAN, D.Sc. 
(.Assistant in the Department of Zoology, British Museum (Natural History )). 
PAGE 
I. —Introduction ......... 1 
II. —List of Stations at which Pycnogonida were obtained ... 2 
III. —List of Species .......... 3 
IV. Notes on Occurrence and Distribution .... 5 
V. —Variation and Specific Characters ...... 6 
VI.—The Significance of the Decapodous Pycnogons 7 
VII.—Nomenclature and Terminology ...... 9 
VIII.—Systematic Notes and Descriptions of New Species ... 9 
IX.—List of Papers referred to . . • • • • .69 
Index . . . • • • • • • .71 
I.—INTRODUCTION. 
The collection of Pycnogonida obtained by the “Terra Nova” Expedition far exceeds 
in extent that of any Antarctic expedition yet reported on. It comprises no fewer 
than forty-four species,* all from the Ross Sea area, with the exception of one species 
(Colossencleis megalonyx, Hoek) represented by a solitary specimen dredged near 
the Falkland Islands. Eleven species are described as new, while five others are 
identified with species only very recently described in Mr. Hodgson’s (1914—15)j 
preliminary report on the Pycnogonida of the German South Polar Expedition. 
While none of the new species can be compared, in point of morphological or 
systematic interest, with the discoveries of earlier expeditions, they serve to accentuate 
* It may be of interest to give the numbers for some other Antarctic expeditions. Excluding name? 
subsequently withdrawn by their authors, or definitely placed as synonyms in the present report, the. 
“ Discovery ” obtained twenty-six species, the “ Prangais ” seven, the “Scotia” fifteen, the “ Pourquoi 
Pas 1 ” twenty-four, and the “ Gauss ” twenty-nine. 
j The numbers enclosed within brackets refer to the list of papers at the end of the Report. 
vol. in. 
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