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A sino-le specimen, a male, undoubtedly belonging to this species was found in the 

 plankton collected with the Hensen vertical net at Station 128, 700 metres to surface. 

 Euchirella amoena appears to be only known from the Pacific Ocean. 



2. Euchirella hessei (Brady). 



Euchaeta hessei Brady, 1883, p. 63, pi. XXIII. 



Euchirella bella Giesbrecht, 1888, p. 336. 



Euchirella bella Giesbrecht, 1893, p. 233, pi. 15. 



Euchirella bella Giesbrecht & Schmeil, 1S98, p. 35. 



Euchirella rostrata Thompson & Scott, 1903, p. 244. 



Euchirella bella, var. indica Wolfenden, 1905 (a), p. 1006, pi. XCVI. 



This was the most common member of the genus in the plankton collected during the 

 traverse of the 'Siboga', and was found at the following stations. 



Stat. 1 17', 1 specimen. — Stat. 1 18 (HENSEN vertical net 900 metres to surface), 2 specimens. — 

 Stat. 128 (HENSEN vertical net 700 metres to surface), 2 specimens. — Stat. 141 (HENSEN 

 vertical net 1500 metres to surface), 12 specimens. — Stat. 142, 4 specimens. — Stat. 177", 

 4 specimens. — Stat. 185 (HENSEN vertical net 1536 metres to surface), 3 specimens. — 

 Stat. 203 HENSEN vertical net 1500 metres to surface), 3 specimens. -- Stat. 230 (HENSEN 

 vertical net 2000 metres to surface), 1 specimen. — Stat. 252, 6 specimens. 



I regard the species described by Brady in the 'Challenger Report' as Euchaeta hessei, 

 and the figures given on Plate XXIII, to be identical with the form described by Giesbrecht 

 as Euchirella bella. Brady's figure of the first joint of the basiopodite of the fourth pair of 

 feet shews four spines, although he states 'about five very broad and strong spines' in the 

 description. Eticliirella rostrata has a row of six or seven triangular lainellae on the first joint 

 of the basiopodite of the fourth pair of feet. Euchirella hessei, with one exception, was obtained 

 in plankton collected by the 'Challenger' in the Pacific Ocean. Giesbrecht has recorded it from 

 the Pacific Ocean only. Euchirella rostrata, with the exception of the record by Esterly, is 

 only known from the Mediterranean, and North Atlantic Ocean. The species recorded in the 

 Ceylon Report by I. C. Thompson and the present writer, from Stat. 21 (off Minikoi) and Stat. 

 23 (Maldives to Gulf of Manaar), has proved on re-examination to be identical with Euchirella 

 bella, and therefore the same as Euchirella hessei (Brady). 



I find that the number of spines on the first joint of the basiopodite of the fourth pair 

 of feet vary from three to four, instead of four, as stated by Giesbrecht and Schmeil. The 

 two innermost spines apparently fuse in some cases and form one large spine, thus giving 

 rise to three spines, one of which is decidedly larger than the others, instead of one large and 

 three smaller spines. 



I see nothing to distinguish VYolfenden's variety indica from the specimens collected by 

 the 'Siboga'. 



The form described by Brady as the male of Euchaeta hessei and Cleve's male of Euchi- 

 rella rostrata (1900), both appear to be identical, but the fifth pair of feet is quite distinct 

 from that of a true Euchirella. 



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