ig 
PACTOLUS. 
CHARACTER GENERICUS. 
esta subtriangularis antice rostratata ; rostrum integrum ; 
ocult distantes, subglobosi pedunculo crassiores. 
AgpoMEN Femin 5-articulatum, articulis primo angusto, 
2,3 et 4 transverso-linearibus, 5 amplissimo subrotun- 
dato. 
Pedes mediocres decem ; paria 1, 2 (et 3?) ungue simplici 
instructa, 4 et 5 didactyla. 
PACTOLUS. 
GENERIC CHARACTER. 
Shell somewhat triangular, terminated anteriorly with an 
entire beak ; eyes somewhat globose, remote, thicker 
than their peduncles, 
Abdomen of the female five-jointed, the first joint narrow, 
the second, third, and fourth transversely linear, the 
fifth very large and somewhat rounded. 
Legs moderately long, ten in number ; the first and second 
(probably also the third ?) pairs furnished with a simple 
claw, fourth and fifth pairs didactyle. 
This curious and anomylous genus has escaped the ob- 
servations of all crustaceologists, and although the palpi, 
antenne, and the extremities of the third pair of legs be 
wanting, yet the remaining characters are so very strong, 
that I cannot refrain from publishing an account of the 
existing parts, which are too interesting to be permitted te 
remain undescribed. ‘The internal antenne are received 
into two longitudinal cavities between the eyes, as in the 
genera Macrvpodia and Leptopodia. 
