BY PROFESSOR T. THOMSON FLYNN. 15 



Third leg— 1st Tibia .62 mm. 



,i' 2nd Tibia .48 ,, 



,, ,, Tarsus and Propodus .6 ,, 



,, ,, Claw .36 „ 



Affinities. This species differs from H. viridintes- 

 tinaiis m many points, but particularly in the proportions 

 of the trunk segments, in the possession of a dorsal spin© 

 on the tarsal joint, and in the presence of teeth on the 

 inner edge of each of the chela, fingers. 



I have taken the opportunity of naming the species 

 after my old friend and tutor. Professor Haswell, to whom 

 our present knowledge of Australian Pycnogonida is almost 

 entirely due. 



Occurrence — Shark Island, Port Jackson, found at 

 low tide amongst (6) mussels (BracJiyodonfes hirsutus). 



Holotype, 1 o > Australian Museum Collection, No. 

 4,156-62. 



HaJosoma Iiaswelli, sp. nov. (Holotype 1.3 mm. long, 

 from Shark Island, Port Jackson). 



1. Entire animal (o) dorsal view. 



2. Profile view, legs removed. 



3. Anterior end, ventral view. 



4. Chela, anterior view. 



5. Terminal joints of oviger. 



6. Tarsus and propodus. 



(6) It is of interest to note that H". viridiniestinalis has been 

 recently found also among mussels at Laguna Beach, California (1915 

 Hilton Journ. Bntomol. and ZooL, Vol VII., p. 69 and p. 205). 



