506 



PYCNOGONIDA 



CHAP. 



Iii Ammothea and its allies they are extremely rudimentary 

 in the adult, being reduced to tiny knobs in Tanystylum and 



A B C D 



FIG. 266. A, B, Chelophores of Ascorhynchus abyssi, G.O.S. A, Young; B, adult. 



(After Sars.) C, Anterior portion of Ammothea hispida, Hodge, Jersey : late 



larval stage (=Arlieha Ivngipes, Hodge), showing complete chelae. D, Chela of 

 : hispida, Kr. 



Try gams, and present as small two-jointed appendages in Ammo- 

 thea ; in this last, if not in the others also, they are present in 

 complete chelate form in the later larval stages. 



In Eurycide, Ascorhynchus, and Barana they are usually less 

 atrophied, but yet comparatively small and with imperfect chelae, 

 while in some Ascorhynchi (A. 'ini nutus, Hoek) they are reduced 



to stumps. 



In Pallenopsis the scape of the chelophore consists of two 

 joints, as also in Decolopoda and some Ascorhynchus : in Nymphon, 



Fie. 2t>7. Chelae of species of Nyniphonidae : A, Nymphon brevirostre, Hodge ; B, 

 Jioreonymj}hon robustitm, Bell ; C, Chitc/mi I/II//I/KHI min-ni/ii/.i; G.O.S. ; D, Nym/phon 

 Hansen. 



r/ioxichilidium, Pallene, and Cordylochele of one only ; in all 



furnished with a pair of distinctly three-jointed mandibles; and the specimen 

 uas the largest of the three obtained." 



