Crustacea.] 



SUBANTARCTIC ISLANDS OF NEW ZEALAND. 



641 



and only slightly produced ; merus broad, especially towards distal end, so that the 

 whole joint is triangular ; carpus wide and irregularly dilated, greatest width about 

 two-thirds its length ; propod slightly longer than carpus, not dilated ; all the joints 

 supplied with rather long setae, except on the posterior margin of the merus, which 

 has only two at the distal end. In other respects closely resembling P. maynei. 



Female. — Resembling that of the two preceding species, except that the second 

 antennae are shorter, being, as in the male, only about one-third the length of the 

 body. 



Hab. — Several specimens from Norman's Inlet taken in company with P. maynei 

 (J. B. Mayne) ; others under logs on Auckland Island (Professor W. B. Benham). 



Type in the Canterbury Museum, New Zealand. 



This species is readily recognised by the short antennae, the large rounded 

 propod of the second gnathopod with its simple palm, and by the dilatation of the 

 merus and the carpus of the fifth peraeopod ; -the peraeopods, too, are not so elon- 

 gated as in the preceding species. 



Parorchestia improvisa, sp. nov. 



Male. — Unknown. 



Female. — In general shape resembling P. sylvicola. Body not much compressed ; 

 first three segments of pleon with lower margin slightly convex, posterior angle of 

 third segment right-angled, with 

 corner a little rounded. Eyes 

 rather large, as far apart as their 

 width. First antenna reaching 

 middle of fifth joint of peduncle 

 of second antenna, third joint of 

 peduncle longer than second, 

 flagellum about seven- jointed. 

 Second antenna long, slender, 

 about three-fourths the length of 

 the body, fifth joint of peduncle 

 nearly twice as long as the fourth, 

 flagellum longer than peduncle, 

 about 35- jointed. First gnatho- 

 pod (figs. 10a, 106) with the pro- 

 pod moderately large, widened, 

 width about half the length, with 

 the palm oblique, occupying nearly 

 one-half the length of the whole 

 posterior margin, the palm being 

 defined by one or two stout setae 

 situated on a little projection which is separated from the rest of the palm by 

 a depression, another stout seta arising on the inner surface near the middle of 

 this depression, the rest of the palm nearly straight or only slightly convex and 

 bordered with a row of short setae, three other longer ones being situated on the 

 surfacejnear the palm and an oblique/ow of about six orj^seven furtherj^back^on the 

 outer surface of the propod ; the posterior margin of the propod also bears an irregular 

 42— S. 



Fig. 10. — Parorchestia improvisa, sp. nov. 



10a. First gnathopod of female. 



106. Palm of same, more highly magnified. 



10c. Second gnathopod of female. 



