CLASSIFICATION DECOLOPODIDAE 



531 



CLASS PYCNOGONIDA.i 



Marine Arthropoda, with typically seven (and very exception- 

 ally eight) pairs of appendages, of which none have their basal 

 joints subservient to mastication, the first three are subject to 

 suppression, the first (when present) are chelate, the second 

 palpiform, the third ovigerous, and the rest form ambulatory 

 limbs, usually very slender and long ; with a suctorial proboscis, a 

 limbless, un segmented abdomen, and no manifest respiratory organs. 



Fam. 1. Decolopodidae. — Appendage I. dwarfed, but com- 



FiG. 282.— Decolopoda australis, Eights. A, x 1 : from a specimen olDtaiiied at the 

 South Shetlands by the Scotia Expedition. B, First appendage, or chelophore. 

 (A, original ; B, after Hodgson.) 



plete and chelate, scape with two joints; II. 9-10-jointed ; III. 

 well developed in both sexes, 10-jointed, the terminal joints with 



1 See {,inter alia) Dohrn, I.e. ; E. B. "Wilson, Sep. U.S. Fish. Oomm. (1878),1880 ; 

 Hoek, Chall. Report, 1881 ; G. 0. Sars, Norw. N. Atl. Exp. 1891 ; Meinevt, IngolJ 



