264 GAMMARIM. 



rather obtuse, and the last is so broad at the base that it 

 assumes more the appearance of a hump than a tooth. 

 The eyes are large, reniform, and of a red-orange colour. 

 The superior pair of antennas are more robust than the 

 inferior, and we presume that they are longer, but the 

 flagellum is mutilated in our unique specimen. The 

 articuli of the flagellum are very short, and except the 

 first all are shorter than broad, each supporting on the 

 inferior surface a few hairs and an auditory cilium. The 

 inferior antennae are about one-fourth of the length of 

 the animal, and have the olfactory process extremely 

 long. The maxillipeds have the sixth joint anteriorly 

 produced nearly as long as the finger, which is very long 

 and slender. The first pair of legs have the hand small, 

 and but slightly dilated ; they are ovate, with the palm 

 oblique. The second pair have the hand large, increas- 

 ing in width to the palm ; the inferior margin being 

 straight, while the superior is arcuate, especially towards 

 the wrist. The palm is concave, not oblique, defined by 

 two or three small cusps on the inferior angle, and 

 furnished with several stout blunt spines. All the 

 walking legs are short, stout, nearly of the same length, 

 and furnished upon the inner margin with short blunt 

 spines, subapically tipped with a single cilium. The 

 caudal appendages reach nearly to an equal extent, and 

 the branches are furnished, on the posterior margins, with 

 short spinules. 



The animal, after being placed in spirits, is straw- 

 coloured, except the eyes and the posterior segment of 

 the tail, which are tinted with a blush of red. We have 

 only seen one specimen, which was taken by Mr. J, Gwynn 

 Jeffreys, during the last summer, off the Shetland Islands. 



