276 "TERRA NOVA" EXPEDITION. 



species has been recorded since by Chilton (1906) from further localities. In 1908 

 Caiman recorded a specimen from New Zealand which he referred to the gemxs Pseudo^nma, 

 but this was too immature to name specifically. In 1913 I vecoxded Siriella denticulata 

 from Auckland Harbour, and in 1918 I described a second species of Tenagomysis, 

 T. tenuipes, from Carnelly Harbour, Auckland Islands, while Zimmer, in 1918, recorded 

 Theganomysis sp. (ol)viously a misprint for Tenagomysis sp.), from the Bay of Plenty. 



This, in brief, is the history of our knowledge of the Mysidacean fauna of New 

 Zealand to date, and the net result is three good species and two doubtful. The 

 " Terra Nova '"' collected twelve species off the coasts of New Zealand, only one of 

 which, Siriella denticulata, had been recorded from there before. In addition, I describe 

 below a new species of Tenagomysis, not collected by the " Terra Nova," but sent 

 to me by Professor Chilton, so that the total number of New Zealand species of Mysidacea 

 is now brought up to fifteen. Of the twelve species collected by the " Terra Nova," 

 seven are described as new and, of these, no fewer than six are referred to the genus 

 Tenagomysis. Unknown elsewhere, this is the characteristic Mysid genus of New 

 Zealand. Nine species in all are now known, and I have taken the opportunity afforded 

 by the present material to summarise our knowledge of the genus and to provide a 

 key to the species. Further species of Mysidacea undoiibtedly await the energetic 

 collector in New Zealand. Professor Chilton has sent me a single damaged Mysid, 

 collected at Akaroa in 6 fathoms of water by the late H. Suter. I am unable to identify 

 it, or to refer it to its correct genus, becaiise of its condition, but it most certainly 

 represents a new species of a genus allied to Neomysis, possibly identical with it. I 

 hoped, at first, that it might prove to be Kirk's forgotten species, but it does not agree 

 with his description. Here, then, are at least three species to be found and described, 

 and there must be many others. 



The most interesting of the remaining species collected by the " Terra Nova," 

 is one captured off the east coast of South America, which I have referred to Dana's 

 long-forgotten genus Promysis, with which I regard Hansen's Uromysis as synonymous. 



My thanks are due to the authorities of the British Museum for entrusting me with 

 this collection for examination and report, and especially to Dr. W. T. Caiman for 

 much help and advice. I am indebted to Professor W. B. Benham for the opportunity 

 of examining the type specimens of Tenagomysis novae-zealandiae, and for other material 

 of this genus, and to Professor C. Chilton, v/lio kindly sent me all the Mysidae iii his 

 collections, and gave me much assistance in my endeavours to trace the whereabouts 

 of Kirk's type specimens. To my wife I owe a special debt of thanks for the drawings 

 which illustrate this report. 



