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, -Jg- 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. 



Farm HAEPACTICIDiE. 



Sub-fam. Amymomesle. 

 Genus Amymome, Clans. 



" 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 antennas elon- 

 gated, 6- or 8-jointed ; second pair 3-jointed, and bearing a small 1- or 

 2-jointed secondary branch, last joint clawed. Mandible palp 1-branched ; 

 maxillar palp elongated, 2-jointed. First foot-jaw slender, 3-jointed ; 

 second much elongated, 2-jointed, and forming a strong grasping hand. 

 First xDair of feet not prehensile, 2-branched, each branch consisting of a 

 single joint ; second, third, and fourth pairs with both branches 3-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. 



1. A. clausii, n. sp. PI. 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 setae minute. Eye large, very difficult to dis- 

 tinguish satisfactorily. Anterior antennae 6-jointed, about as long as the 

 first segment of the body ; first and second joints subequal, third about half 



