THK EXOGONE^. 223 



They ai'e sub-cylindrical, relatively thick, truncate distally, the edge of the 

 terminal face finely crenulato and with a few lone; non-motile cilia. The 

 most striking feature of the dorsal cirri is the presence in each of a pair of 

 spindle-shaped bundles of thread-like objects situated towards the distal end, 

 each enclosed in a sac which is produced into a narrow prolongation or duct 

 ending at the free end of the cirrus. These, as pointed out by Claparede, are 

 the equivalents of the " glandes a batonnets" (rhabdite glands) found more 

 deeply placed in some allied Syllids such as Spliarosyllis hystrix. In close 

 opposition with these is a rounded sac witli granular contents, having like 

 them a prolongation or duct opening at the free end of the cirrus. The 

 ventral cirri are short, cylindrical, not nearly so long as the parapodia. 

 The anal cirri are like the tentacles in shape and are half as long again as 

 the dorsal cirri ; there is no unpaired process between them. 



The proventriculus in the retracted state of the proboscis lies in the 4th 

 and 5th or 5th and 6th segments. Its walls contain about twenty rows of 

 muscle-columns. 



G-kubea kerguelensih, Mcintosh. (Plate 17. figs. 18-20.) 



Salvatoria kerguelensil, Mcintosh, 20, p. 188, pi. 30. fig. 4; pi. 33. fig. 1; pi. 15 A. 



tigs. 11 &12. 

 Spheerosyllis Macintoshi, Ehlers, 8, p. 46. 



Grubea Icen/iielensis, Augener, 1, p. '252, text-tig. 37 ; Taf. 3. tig. 23. 

 ? Grubea limbata, Claparede, 2, p. 208, pi. 13. tig. 4. 



A species of Grubea which is fairly common in Port Jackson corresponds 

 for the most part to Claparede's description and figures of his G. limbata, 

 with certain differences, the most important being in the shape of the setae. 

 I think the Port Jackson species may be the same as one found common in 

 the collections from South-west Australia studied by Augener, and identified 

 by that author with G. herguelensis (Mcintosh). I do not think that 

 sufficient grounds for that determination aj-e adduced, but here accept it 

 provisionally. Meanwhile I give some figures of the Port Jackson form 

 which may help to solve the question. 



It is to be noted that Claparede gives as one of the differences between 

 his G. limbata and his G. tenidcirrata that in the latter the second dorsal 

 cirrus is longer than those that follow. But this can only be a matter of 

 degree since in his figure of the former species he represents the second 

 dorsal cirrus as distinctly longer than those behind. 



Gkl'bea QUADRioci'LATA, Aihjenev. (Plate 17. figs. 21-26.) 

 Grubea quadrioculata, Augener, 1, p. 254, text-fig. MS; Taf. 3. fig. 31. 



This Grubea, which Augener found rare in the South-west Australian 

 collections, occurs, also somewhat rarely in my experience, in Port Jackson. 

 It is most clearly distinguishable from the preceding by the absence, in the 



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