98 
first pair of trunk legs have moderate-sized chelae ; the second 
pair are also chelate, with the wrist or fifth joint sometimes 
much and sometimes little sub-divided.” 
The new genus about to be described falls fairly well under 
this definition, although only one member of the second pair 
of trunk-legs might be considered chelate in the strict sense 
of the term, the other abnormally developed member being 
complexly sub-chelate. Both members have the fifth joint 
or “‘ wrist ’’ sub-divided into four articulations, by this plurality 
settling the genus in the legion Polycarpinea. Usually the 
divisions of the wrist or carpus are either more or fewer than 
four. 
Ortmann has withdrawn some of the genera included by 
Bate in this family to forma new family Latreutidae, in which 
he includes Lysmata, Riss®, formerly regarded as a member 
of the Nikidae. Borradaile (Willey’s Zool. Results, Part 4, 
p- 414, 1899) expresses the opinion that “the difference 
between the Latreutidae and Hippolytidae will not .. . be 
ultimately found to be of more than sub-family value.” As 
already noted, Miss Rathbun in 1904 places the genus Processa, ° 
Leach, in a family Lysmatidae, thus by implication not agreeing 
with Ortmann’s removal of Lysmata from the Nikidae. In any 
case, however, the name of the family should not be either 
Nikidae or Lysmatidae, but Processidae as given by Ortmann 
in 1896. 
Gen. Leontocaris, nov. 
First antennae with two flagella subequal in length. Scale of 
second antennae broad. Mandibles with cutting edge, molar, 
and small one-jointed palp. First maxillipeds with exopod 
strongly laminar. Third maxillipeds pediform, bulbous at 
base, with no distinct exopod. First peraeopods slender, 
chelate, fifth joint elongate. Second peraeopods unsymmetri- 
cal, one slender, normally chelate, the other with sixth joint 
both long and broad, the finger flat, distally widened and 
curving over the much shorter thumb. First pleopods of the 
male with inner ramus short and broad, carrying a partially- 
separated retinaculum. 
The name Leontocaris signifies the Lion’s Shrimp, the repre- 
sentative species having been obtained by submarine explora- 
tion off the Lion’s Head. 
