376 GAMMARIDJl. 



flagellum is not longer than the peduncle ; the secondary 

 appendage is also short. The inferior pair are some- 

 what longer than the superior, a circumstance that 

 induces us to believe that the latter have been shortened 

 by accident, since they are longer in the specimens which 

 we have considered to belong to this species, and also 

 generally in the genus ; in fact, we only know of two 

 species, G. Caspius and G. Atchensis, of Brandt, that 

 have the superior antennas shorter than the inferior. 

 The hands are nearly of one size and ovate. The second 

 and third segments of the tail are infero-posteriorly pro- 

 duced to a point. The posterior pair of caudal ap- 

 pendages reach much beyond the preceding two. The 

 branches are unequal, the inner being about half the 

 length of the outer, and both are fringed with short 

 obtusely-pointed spines. The central tail-piece is 

 double. 



We have taken our description and figure from one 

 of the specimens preserved in the British Museum, 

 which are those from which Dr. Leach originally defined 

 the species, and which were found by him in the sea near 

 Loch Ranza in the Isle of Arran. Our friend, the late 

 Mr. Barlee, sent us some from the Shetlands. And it 

 appears to us that the sigmoid form of eye is not to be 

 depended upon, for many of the specimens differ in no 

 respect from the others except in the crooked eyes. 

 The probability therefore is, that the crooked eye is 

 an abnormal form, and not the true condition of the 

 organ. 



Thompson, in his Natural History of Belfast, states 

 that it has been found by Mr. Hyndman and himself, 

 at Belfast, in the tidal river Lagan above the bridge at 

 high water. 



This species appears to be a form intermediate be- 



