GENUS AND SPECIES FROM NEW ZEALAND. 333 



in a line with the single spinule on the 4:th segment. Eye of moderate size, 

 of many facets, rounded or slightly oval. Side plates 1-4 of about equal 

 depths, not so deep as their respective segments ; the anterior lobe of the 5th 

 side plate small ; 6th and 7th side plates subquadrangular with posterior 

 margins rounded. 



Upper antenna about two-thirds as long as the body, much longer than the 

 lower antenna ; peduncle with first joint stout, berii'ing below numerous 

 strong spines, second segment about two-thirds the length of the first with a 

 group of three stout spines on lower surface about one-third the length from 

 the base, third segment short, nearly similar to the joints of the flagellum ; 

 flagellum more than twice as long as the peduncle and of many joints. 

 Antenna 2 with fourth joint much the longest, armed above and below with 

 stout spinules, fifth joint less than half as long as the fourth ; fiagellum many- 

 jointed, longer than peduncle. First and second gnathopods equal in size 

 and similar in shape, carpus about as long and broad as propod ; the latter 

 ovoid with the palm oblique, straight or slightly concave, defined by one or 

 two stout spinules. All the perseopoda with the dactyl particularly strong 

 and bent back upon the propod, which bears three groups of stout spines, the 

 whole forming an effective grasping organ. Third uropod reaching beyond 

 the end of the second uropod and of the telson, its two branches broadly 

 lanceolate, each with both margins armed with stout spinules. Telson nar- 

 rowing distally, cleft for rather more than two-thirds its length, each lobe 

 with a stout spinule at the end and two or three on the lateral margin. 



Colour. — Bright red, eyes red. 



Length of largest specimen (in position in which it is drav/n) 9 mm. 



Hah. Oamaru, on East Coast of South Island of New Zealand, four speci- 

 mens ; one small immature specimen from Lyttelton Harbour. 



General Description. 



In most of the characters this species presents a fairly close resemblance 

 to species of Dexamine and Faradexamine, though, as seen from the generic 

 description, it combines characters belonging to different genera. The 

 general shape and carination of the body is not unlike that of D. spinosa 

 (except that none of the segments is produced into teeth) , while the carina 

 on the fourth pleon segment is almost the same in outline as that of D. spini- 

 ventris (A. (Josta). The integument seems particularly hard and firm. I 

 oive the following general description of the difi:erent appendages for 

 comparison 'Aith other species. 



The upper antenna (Plate 26. fig. 2) is about two-thirds the length of the 

 body, and has the first joint longer and broader than the second and fringed 

 with about a dozen stout spinules on the distal half of the lower margin; the 

 second joint has a group of three similar spinules about one-third its length 



