144 PROCEEDINGS OF THE ACADEMY OK [1892. 



Var tentte Slater (Ann. Mag. Nat. Hist. vol. Ill, p. 283). 



Japan. 

 P. auitrale Grube (Jahresb. der schles. Ges. f. vateri. Cultur, 1869, p. 54.) 



Australia. 

 P. nodulosum Dohrn (Fauna und Flora des Golfes von Neapel, III, pp. 203-207, 



Tal. XVI, Fig. 1-3, 1881). 



Mediterranean (Naples). 

 P.pusillum Dohrn (Op. cit. pp. 207-210, Taf. XVI. Fig. 4-8). 



Mediterranean (Naples.) 

 P. crassirostre Sars (Den Norske Nordliavs-Expedition, XX, pp. 12-14, 1891.) 



Norwegian Coast, Iceland. 



EXPLANATION OF PLATE X. 



Fig. 1. Pycnogonum Stearnsi, n. sp., dorsal surface, much enlarged. 

 Fig. 2. Right side of the trunk. 

 Fig. 3. Ventral surface of the trunk. 



Fig. 4. Postero-dorsal surface of the third ambulatory leg on the left side, 

 much more enlariie i. 



