230 CANON A. M. NOKMAN ON THE PODOSOMATA 



Order III. ACHELATA, G. 0. Sars. 

 Family 1. Pycnogonid^, G. 0. Sars. 

 Genus 1. Pycnogonum, Briimiich, 1764. 

 1. Pycnogonum littoeale, Strom. 



Pycnogonum littorale, Strom, Physisk og ceconomisk Beskrivelse over Fogderiet 

 Sondmor, 1762, p. 209, pi i. fig. 17. 

 „ balcenarum, Linne, Syst. Nat. ed. xii. i. p. 1028. 



„ pelagicum, Stimpson, Mariue Invert. Grand Manan, p. 37 (immature 



form). 

 „ littorale, G. O. Sars, (51) p. 7, pi i. figs. 1 a-i. 



Sars's figures are excellent and there is no need o£ extending references for 

 this well-known form. 



Specimens in my collection are from Guernsey ; Essex Coast ; Cullercoats, 

 Northumberland ; Isle of Cumbrae ; Shetland, very large ; Valentia, Ireland 

 {A. M. N.). Lat. 59° 23' N., long. 1° 4' W., in 374 fathoms {'Porcupine,' 

 1869). Eastport, N.E. America (M/son). Mus. Nor. 



It is usually a shore or shallow-water species, but sometimes reaches great 

 depths, and it ranges from the west coast of France northwards right round 

 the coasts to the White Sea ; found again at Iceland, Greenland, and down 

 the American coast to lat. 41° 30'. Off St. George's Banks it is recorded 

 by Smith and Hargar (U.S. Fish. Comm., 1872) from 406 fathoms. Wilson 

 gives the measurements of a large female as : body (without rostrum) 10 mm., 

 rostrum 5 mm., legs 15 mm. One of my Shetland specimens is slightly 

 larger — body 11 mm., rostrum 6 mm., front leg 15 mm. 



2. Pycnogonum ceassirostee, G. 0. Sars. 



Pycnogonum erassirostre, G. 0. Sars, (50) No. 2 ; (51) p. 12, pi i. figs. 2 a-h, 

 „ „ Norman, (45) p. 151. 



„ „ Meinert, (37) p. 61. 



Kors Fiord, near Bergen, 180 fathoms, 1878 ; in the Hardanger Fiord, in 

 Stoksund, 80-100 fathoms, and off Midso Lighthouse, 50-100 fathoms, 1879; 

 Rodberg, in Trondhjem Fiord, in about 70 fathoms, 1893 (A. M. N.). 

 Mus. Nor. 



The types described by Sars were found mixed with some P. littorale.. 

 which he had collected from different parts of the coast. 



Meinert records a specimen as taken by the ' Ingolf ' Expedition in 

 Denmark Strait, in the mouth of Bredebugt in Iceland, in 70 fathoms. 



3. Pycnogonum pusillum, Dohrn. 



Pycnogonum ptisillum, Dohrn, (9) p. 207, pi. xvi. figs. 4 8. 

 Naples (cotype Dohrn). Mus. Nor. 



