198 



Copepoda, have proved on re-investigation to belong to the genus Canuella. They are quite distinct 

 from the type of the genus, and also from the species described by Professor G. O. Sars in 

 'Crustacea of Norvvay' Vol. V. 



Genus Sunaristes Hesse, 1867. 



The female of this genus is readil)' separated from Canuella by the entire absence of 

 a subdivision of the genital segment, and by the normal structure of the endopodite of the 

 second pair of feet. There is no spine on the first joint of the endopodite of this pair of feet. 



The male antennules are developed into powerful prehensile appendages and are 

 furnished with a very strong terminal claw. The outer distal end of the first and second joints 

 of the endopodite of the second pair of feet is produced into a strong spine. The exopodite 

 of the mandible palp of both sexes is three jointed. 



One species was represented in the material collected by the 'Siboga'. 



[ . Sunaristes paguri Hesse. 



Sunaristes paguri Hesse, 1867, p. 205, pi. IV, figs. 11 — 25. 

 Longipedina paguri W. Muller, 1884, p. 19, pi. XIII. 

 Sunaristes paguri A. Scott, 1896, p. 11. 

 Sunaristes paguri -I. C. Thompson, 1896, p. 24. 

 Sunaristes paguri T. & A. Scott, 1897, p. 490, pis. XI & XII. 

 Sunaristes paguri Thompson & Scott, 1903, p. 255. 

 Sunaristes paguri Sars, I903(«), p. 15, pis. VI & VII. 

 Sunaristes paguri Norman & T. Scott, 1906, p. 135. 



A single male identical with the above species was found in the washings from dredged 

 invertebrata collected at Station 164, at a depth of 32 metres. 



The terminal claw of the antennules and the strong spiniform projection of the first and 

 second joints of the endopodite of the second pair of feet are of a very dark colour, and were 

 easily visible in the 'Siboga' specimen. 



Hesse's type specimen was obtained from a molluscan shell inhabited by a hermit crab. 

 I occasionally find both males and females by simply washing the molluscan shells containing 

 hermit crabs [Pagurus bernhardus) in dilute methylated spirit, and examining the residue. 

 Hermit crabs caught in the fish trawl in the Mersey estuary invariably yield one or two 

 specimens of Sunaristes paguri when submitted to the treatment mentioned. I have not found 

 this Copepod anywhere else in the Irish Sea. 



Sunaristes paguri has been recorded from various parts of the British coast, from the 

 coasts of France and Norway, and from Ceylon. 



25. Family Ectinosomidae. 



Genus Microsetella Brady and Robertson, 1873. 



The members of this genus are readily recognised by their small size, by the cylindrical 



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