u^^^^^^ 



144 



STALK-EYED CRUSTACEA. 



terior gastric region are not prolonged into spines, and the eye lacks any 

 dark pigment. TI:>e absence of pigment in the eye, however, I think may 

 be due to the action of alcohol. The spine at the antero-lateral angle of the 

 carapace is bent down at a greater angle with the axis of the body than it 

 is in the "Albatross" species, and I think this is also true of the typical 

 G, nohilis. 



Bate's G. acundnala appears to be very closely allied to G, noUliSj^ndi per- 

 haps will prove to be only a smooth form of the latter species. 



G, giksii Wood-Mason is a smootlier form characterized by the full 

 development of the anterior part of the third crest of the carapace. In 

 G, unguiculata Wood-Mason, the carapace and abdomen are covered with a 

 velvety pubescence, the postero-inferior corners of the second and third 

 pairs of abdoniinal pleura) are angular rather than spinose, and the outer 

 margins of the dactyli of the fourth and fifth pairs of legs are produced near 

 the apex into a minute, incurved claw. 



The type sj)ecimcn of G, nobilisMvas taken in 1131 fathoms near the Island 

 of Dominica, W. I. 



Gl y phocr angon sicaria Fax. 



Flate XXXIX. 



•"^ 



Bull. Mus. Comp. ZooL, XXIV. 202, 1893. 



Rostrum equal in length to the rest of the carapace, armed with a pair 

 of short, blunt lateral teeth a little in advance of the front of the eyes, and 

 another pair of obsolescent ones at the root. Between these two pairs of 

 teeth the margins of the rostrum are concave and a little raised. From the 

 anterior teeth the rostrum tapers regularly to the point. The upper surface' 

 is plane and smooth (neither corrugated nor ciliated), A slight median 

 carina, most obvious near the tip, runs the whole length of the rostrum 

 from the anterior boundary of the gastric area to the tip, and the lateral 

 margins are lightly rimmed. The lower surface is grooved longitudinally, 

 and wholly devoid of a median keel. 



The orbital spine is rather short and thick, and is directed a little out- 

 ward and upward. The spine at the antero-external angle of the carapace 

 is also short and thick, but shghtly exceeding the orbital spine ; it is turned 

 but very slightly outward, but its dow^nward deflection is stronger. From 

 its base a low carina extends backward over the hepatic area. This carina 



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