98 Transactions.— Zoology. 
spines and a short seta. Abdomen slender, first joint about equal in length 
to the two following: last segment much shorter than preceding; caudal 
segments nearly as broad as long. Longest caudal seta equalling the abdo- 
men in length ; outer and inner very short. Length, 44 of an inch. 
Hab. Tomahawk Lagoon, near Dunedin (several specimens). 
The above description is almost that of Dr. Brady; my specimens 
differ from his in hardly any respect but the form of the caudal forks. 
Any other differences are unimportant. 
Fam. HARPACTICIDA. 
Sub-fam. Amymominz. 
Genus Amymome, Claus. i 
“ Body much compressed. Dorsal margin very convex. Head and last 
thoracic segment very large, produced ventrally and approximating so as to 
give a more or less circular outline to the animal. Abdomen very short. 
Head united with the first thoracic segment. First pair of antennæ elon- 
gated, 6- or 8-jointed ; second pair 8-jointed, and bearing a small 1- or- 
2-jointed secondary branch, last joint clawed. Mandible palp 1-branched ; 
maxilar palp elongated, 2-jointed. First foot-jaw slender, 3-jointed ; 
second much elongated, 2-jointed, and forming a strong grasping hand. 
First pair of feet not prehensile, 2-branched, each branch consisting of a 
single joint ; second, third, and fourth pairs with both branches 8-jointed. 
Fifth foot in the female composed of two, in the male of one, joint. Integu- 
ment excessively tough and coriaceous, usually cellular or areolated.” 
The animals forming this genus differ from all others of the family to 
which they belong in being laterally compressed. In fact their appearance 
is so remarkable that, until their structure is examined in detail, their 
affinities would never be suspected. Other prominent characteristics of the 
genus are the relatively large posterior foot-jaws, and the strongly-marked 
punctations of the integument. The occurrence of the genus in these seas 
is very interesting, as hitherto it has not been observed, as Brady remarks, 
outside the European area. 
t. A. clausii, n. sp. Pl. V., fig. 1. 
First segment of body greatly produced downwards and posteriorly to an 
almost acute point on each side; four succeeding thoracic segments only 
about one-fourth the depth of the first, and together hardly exceeding it in 
length ; two anterior abdominal segments large, produced downwards, the 
first forming a wide expansion, which nearly meets the first body segment, 
the second ending in an obtuse point ; remaining abdominal segments very 
much abbreviated; caudal sete minute. Eye large, very difficult to dis- 
tinguish satisfactorily. Anterior antenne 6-jointed, about as long as the 
first segment of the body; first and second joints subequal, third about half 
