3G W. .M. TATTERSALT.. 



I hi'cauu' awari', only alter llic plates illustrating this rejiurt hail licen printed, 

 that the two specimens of" Aiitdvctomysis in the ' Discovery ' collections, referred in tho 

 preliminary note to one species ^1. iiidxima, in reality belong to two distinct but very 

 closely allied species. On my appealing to Dr. Hansen, he very kindly sent me some 

 notes and sketches of ^1. maxima, and a second species of the genus discovered by him 

 in a collection which he is engaged in working out. These notes and drawings placed 

 the matter beyond doubt, the larger of my two specimens clearly belonging to Hansen's 

 second species. 1 note tlie species liere, and give the points of distinction, but leave a 

 full description and name to Dr. Hansen. The drawing on PI. VHI., Fig. 1, was taken 

 from the real A. maxima, but the remaining figures on the plate represent the 

 appendages of the second species, which, at the time, I took to be ^4. maxima also. 

 They will probably be of use, however, in illustrating how closely allied the two species 

 are when they are compared with the figures given l)y Coutiere (1906) of the true 

 ^1. maxima. 



Antarctomysis maxima. 

 (PI. VHL, Pig. I.) 



MijkIs maxima (jMns), Holt and Tattursall, I'JoO (_!). 

 AiiUd-ctomijsis maxima, Coutiere, lHOfi. 



Localitij (if capture. — Winter (juarters, 5. G. 02, D-uet hole, 56 fatlioms, one 

 specimen, immature male, 33 mm. 



Coutiere (1906) has recently described this species in great detail from mature 

 examples collected by the French Antarctic Expedition. I have practically nothing to 

 add to his description, l)ut since no figure of the entire animal was given by him, my 

 drawing on PI. VHI., Fig. 1 may be useful. 



Coutiere does not mention the spines arming the inner ventral edge of the inner 

 uropoil. Tliev extend from the posterior inner corner of the otocyst to the extreme 

 tip of the uropod, and posteriorly, at least, are arranged in series of twos, threes and 

 occasionally fours. The species would appear to l)e circumpolar in distribution, since, 

 besides the single s{)ecimen in the ' Discovery ' collection, it has been taken by the 

 French, Swedish and Belgian Antarctic expeditions ; by the two former, in considerable 

 numbers. 



Antarctomysis sp. 



(PI. Vlll., Figs. 2-12.) 



3Ii/sis maxima (pars), Holt ami Tattersall, I'.hii; (1). 



Locality of capture :—L;it. 78° 25' 40" 8., long. 185 39' 6" E., 300 fathoms, one 

 specimen, immature male, 40 mm. 



Tills species is so closoly allied to -1. maxiaia that 1 only became aware tliat it 

 was distinct when too late to properly illustrate it. The figutes 2-12 on Plate VITI. 

 were taken from tlie appendages of this specimen. 



