THOMPSON ULA. DELAVALIA. 153 



fully in a dredging made off Porcressa Bay, Scilly Islands, 

 in twenty fathoms on a bottom of hard sand." 



THOMPSONULA HY^EN^E (I. C. Thompson). 



1889. Joncsiella hytence, I. C. Thompson, Proc. Biol. Soc. Liverpool, 



vol. viii. p. 193, pi. ix. figs. 1-10. 

 1893. Jonesiella hyce/t(e,T. Scott, llth Annual Kept. Fishery Board 



for (Scotland, p. 202, pi. iii. figs. 1-6. 

 1905. Thompsonula hyc(n<e, T. Scott, Ann. & Mag. Nat. Hist. ser. 7, 



vol. xvi. p. 571 (November 1905). 



This interesting species, which was added to the British 

 fauna by the late I. C. Thompson of Liverpool, has been 

 obtained in two localities within the area of this work, 

 namely : St. Mary's, Scilly Islands, collected amongst Zostera 

 in two to three fathoms on the 25th of May ; and Whitsand 

 Bay, Cornwall, collected on the 31st of August, 1903. 



Thompsonula Jiycerxc differs from Danielssenia in having both 

 branches of the tirst thoracic i'eet three-jointed. 



DELAVALIA PALUSTRIS, G. S. Brady. 



1868. Detavalia paluxtris, Brady, Nat. Hist. Trans. North umb. and 



Durham, vol. iii. p. 134, pi. v. figs. 10-15. 

 1880. Delavalia palustris, Brady, vol. ii. p. 43, pi. 1. figs. 1-8. 



This species was observed in three gatherings in one from 

 Salcombe, collected July 9th, 1875, in one from New Grimsby 

 Harbour, Scilly Islands, collected May 23rd, 1903, and in 

 one from the neighbourhood of Plymouth, collected in 

 August 1903. 



DELAVALIA GIESBRECHTI, T. & A. Scott. 



1896. Delavalia Giesbrechti, T. & A. Scott, Ann. Scot. Nat. Elist. 

 Oct. 1896, p. 225, pi. iv. figs. 1-10. 



This species was observed in gatherings from Salcombe, 

 collected in June 1875 (rare) ; Jenny Cliff Bay, Cawsand 

 Bay, and near Chequer Buoy, Plymouth, August 1903. This 

 species is easily distinguished by the peculiar setae at the 

 ends of the furcal joints. 



DELAVALIA NORMANI, T. Scott. 



1899. DeluvaKa Giesbrechti, var., T. Scott, 17th Kept. Fishery 

 Board for Scotland, pt. iii. p. 254, pi. xiii. rigs. 20-22. 



1905. Uelavalia Normani, T. Scott, Ann. & Mag. Nat. Hist. ser. 7, 

 vol. xvi. p. 569 (November 1905). 



This DelavaUa, though having a somewhat close resem- 



