T. '08. 170 



ADDENDUM. 



Glyphocrangon longirostris (Smith). 



While this paper was in press, a single specimen of the 

 genus Glyphocrangon was obtained by the ss. Helga ott the 

 W. coast of Ireland. Hitherto no representative of the family 

 Glyphocrangonidae has been recorded from British and Irish 

 waters. 



The specimen is unfortunately only about half grown ; it mea- 

 sures 40 mm. in length and was caught at Station S.R. 851, 

 lat. 50^ 47-5' N., long. 11° 43' W., 900 fathoms. It agrees in 

 almost every detail with Smith's original description of Glypho- 

 crangon ( = Rhacliocaris) longirostris (1882, p. 51, pi. v, fig. 1, 

 pi. VI, fig. 1) drawn up from a specimen 54 mm. in length and 

 also with Faxon's remarks (1895, p. 143) on the same in- 

 dividual. 



When freshly caught the animal was ivory-white in colour 

 with a suffusion of pink on the rostrum, the anterior part of the 

 carapace, the oral appendages and the first pair of pereiopods. 

 The corneal area of the eyes was pale orange without a tr-ace of 

 black pigment. According to Smith's amended description 

 (1886), drawn up from specimens 99-107 mm. in length, the 

 eyes in full-grown examples are "dark colored as in the 

 other species." 



In the Irish specimen now^ recorded arthrobranchs appear to 

 be absent from the bases of the first two pairs of pereiopods, 

 in accordance with Alcock's definition of the subgenus Plasto- 

 crangon though not with MacGilchrist's account of G. longi- 

 rostris'^ (?) from the Indian Ocean. / 



Apart from the record just mentioned, considered doubtful 

 by the author, only eight specimens of G. longirostris are 

 known ; four of these were found off the east coast of the 

 United States between lat. 31° 41' and 39° 35' N., 1043-1073 

 fathoms (Smith), and four off the S. African coast between 

 660 and 800 fathoms (Stebbing). 



I Ann. Mag. Nat. Hist. (7), xv, 1905, p. 239. 



