SYSTEMATIC ACCOUNT 203 



Pelagobia Viguieri Gravier, 191 lb, pp. 62-5, pi. 2, figs. 22-5. 



Pelagobia longicirrata Ehlers, 19 12, p. 14. 



Pelagobia longicirrata Ehlers, 1913, pp. 460-2 and p. 591. 



Pelagobia longicirrata Bergstrom, 1914, pp. 186-7, n §- 7°- 



Pelagobia longicirrata Ditlevsen, 1914, p. 690. 



Pelagobia longicirrata Fauvel, 1916, pp. 61-2, pi. 1, figs. 6, 7. 



Pelagobia viguieri Chamberlin, 1919, pp. 122-5. 



Pelagobia longicirrata Mcintosh, 1921, p. 294. 



Pelagobia viguieri Benham, 1921, pp. 57-8, pi. 7, figs. 58-60. 



Pelagobia longicirrata Fauvel, 1923, p. 192, fig. yza-c. 



Pelagobia longicirrata Mcintosh, 1923, pp. 435-7, pi. 134, figs. 4 and \a. 



Pelagobia viguieri Benham, 1927, p. 78 (in part). 



Pelagobia longicirrata Augener, 1929, pp. 291-4. 



Pelagobia longicirrata Hardy and Gunther, 1935, p. 113, fig. 52. 



Pelagobia longicirrata Fauvel, 1936a, pp. 16-17. 



Pelagobia longicirrata Monro, 1936, p. 114. 



Pelagobia longecirrata Nolte, 1938, pp. 274-8, figs. 217-23. 



Pelagobia erinensis Nolte, 1938, pp. 278-81, figs. 224-5. 



Pelagobia longicirrata Fauvel, 1939, p. 276. 



Pelagobia viguieri Treadwell, 1943, p. 33. 



Pelagobia longicirrata Stop-Bowitz, 1948, p. 21. 



Pelagobia longicirrata Friedrich, 1950c, pp. 14, 20. 



Pelagobia longicirrata Wesenburg-Lund, 19506, pp. 37-8, chart 9. 



Pelagobia longicirrata Fauvel, 195 1, p. 292. 



Pelagobia longicirrata Stop-Bowitz, 1951, p. 6. 



Pelagobia viguieri Uschakov, 1952, pp. 103-4, %• *• 



Pelagobia longicirrata Fauvel, 1953a, p. 131, fig. 63^-0". 



Pelagobia viguieri Uschakov, 1955, pp. 105-6, fig. 11. 



Description. Normally measuring between 2 and 8 mm. in length for fifteen to twenty-five chae- 

 tigers, a large specimen of this species may be 12 mm. long. The body is slightly flattened dorso- 

 ventrally and chaetae and cirri project far out from the body wall, so that the width of the body 

 across the parapodial bases averages o-8 mm. and the distance between the tips of chaetae is 3 mm. 

 The prostomium is approximately cone-shaped, truncated anteriorly, carrying two eyes and four 

 small antennae, two dorsal and two ventral. The two pairs of tentacular cirri are long and subulate 

 and between each pair is a pedal mamelon with short chaetae. Each parapodium from the third 

 chaetiger onwards (counting the segment carrying the tentacular cirri as the first chaetiger) is well 

 developed, with pedal mamelon, acicula, compound chaetae and long dorsal and ventral cirri. The 

 main shafts of the chaetae are smooth and without denticulation, the terminal articles are long and 

 denticulated along one edge. The anal cirri are short and blunt. 



Discussion. Some authors, Southern (1909), Chamberlin (1919) and Fauvel (1923), have described 

 denticulations on the shaft of the chaetae in P. longicirrata, and this has caused confusion in the status 

 of P. serrata Southern, 1909, and P. viguieri Gravier, 191 1. Originally, P. longicirrata was described 

 with the terminal article of the chaetae denticulated and the shaft smooth. This was accepted until 

 Southern (1909), in describing a new species, P. serrata, with denticulations on the shaft, described 

 similar, but less clear, denticulations on the shafts of chaetae of specimens he assigned to P. longi- 

 cirrata. I have examined the specimens described by Southern (1909) as P. longicirrata, in the Dublin 

 Museum and the B.M.(N.H.) collections (Reg. no. 1909. 11. 29.1), and their chaetae have completely 

 smooth shafts. Furthermore, being able to examine the original specimens of P. serrata in the Dublin 

 and the B.M. (N.H.) collections (Reg. no. 1909. 1 1.29.2), I have been able to compare the shafts of 



6-2 



