I. '08. 23 



In both sexes the exopods of the pleopods are well developed 

 and longer than the endopods. 



The outer uropod is a trifle longer than the inner ; its outer 

 margin is perfectly straight light up to the apex, and it is 

 about two and a half times as long as wide. 



Size. — The largest specimen observed is a female measuring 

 71 mm. 



Colour in life. — The walls of the carapace are semi-trans- 

 parent, with brownish buff gastric and hepatic regions. There 

 are two small patches of minute whitish chromatophores on 

 the inferior margm of the carapace, one at about its middle 

 point and the other just posterior to it. The rostrum is red- 

 dish buff. The abdomen is also tinged with reddish buff, but 

 the walls are largely transparent and the intestine shows 

 through very plainly. The eyes are grey, with a coppery re- 

 flection. The antennal scale is transparent, and the anten- 

 nules, antennae, pereiopods, pleopods, uropods, and telson 

 are all suffused with red or reddish buff. 



This description was drawn up from a large female of 71 

 mm. : the colour is, perhaps, somewhat different in small 

 ejcamples. 



General distribution. — S. siphonocera is a common Medi- 

 terranean species, but records from other seas are scarce. 

 Three specimens have been found in the Bay of Biscay 

 (Caullery) and three off the Azores (Bouvier). Smith 

 (1885) considers that some specimens taken by the Albatross 

 Expedition in the Gulf of Paria, Venezuela, should be referred 

 to this species. 



Irish distribution. — This species was first noticed from the 

 west coast of Ireland by Caiman (1896). The two speci- 

 mens recorded by him were obtained at the following locali- 

 ties : — 



Lord Bandon. 



1886.— Lat. 51° ir N., Long. 11° 31' W., 325 fathoms— One. 



Flying Falcon. 



1888.— Lat. 51° 2' N., Long. 11° 27' W., 345 fathoms— One. 



Since 1888 the species has been again found on five occa- 

 sions : — 



Helga. 



S.R. 97.— 3/5 /'04.— 50° 30' N., 10° 51' W., 199 fathoms. TrawL 



Bottom temperature 10 -7° C. — Two ; one 50 mm. 

 S.K. 187.— 31/1 /'05.— 51° 14' 30" N., 9° 43' W., 57 fathoms. Trawl. 



Bottom temperature 10-2° C, salinity 35 48700— One, 



32 mm. 

 S.R. 353.^6 /8/'06.— 50° 38' N., 11° 32' W., 250-542 fathoms. 



Trawl Temperature at 500 fathoms 8-85° C— Two 60 



and 68 mm. 

 S.R. 447.— 18/5 /'07. 50° 20' N., 10° 57' W., 221-343 fathoms. 



Trawl. Temperature at 300 fathoms 9-87° C, salinity 



35- 48°/ 00— One, 71 mm. 



