SIikIips oil riiaiiiM^ Osti'a'Ods 719 



relatively somewhat higher posteriorly, but otherwise it is of alioiit the sMtiie type as in tiie 

 male. Seen from below it is of the same shape as in C. borealts. 



In the case of the other organs it agreed with C. hurealis. 



Remarks: — As is seen above, tliis tnrni is hooked ii|iiin by <J. \\'. Mi'llKH as a special 

 species. It seemed to me, on th(> contrary, best to put it as a variety of C. burealia G. O. Sau.s. 

 The differences that distinguish it from this form — the length and scidpture of the shell, 

 the number of spines on the e-bristle of the male first antenna and the armature on the d-bristlc 

 of this limb — are so small that they seem to me to form an adequate argimient in favour of 

 tliis alteration; cf., for instance, the difference between C obtusata G. 0. Saks and its variety 

 antarctica. 



G. W. MtJLLER puts forward (1906 a, p. Ill) a number of other differences between these 

 two forms besides those pointed out above. The explanation of this is probably partly that 

 this writer had only maxima forms of C. borealis at his disposal and partly als(j his somewhat 

 deficient knowledge of this form. 



Habitat: — Antarctic Ocean: 



8. A. E., PL station 64 b, lat. 48" 27' 8., long. 42" 36' W.; depth, 250(t— m.; 23. VI. 19(t2: 

 2 mature males, 16 mature females and 12 juvenes; R. M. S. 305, 30H. S. A. E., PI. station 

 70 b, lat. 49" 56' S., long. 49" 56' W.; depth, 2700—0 m.; 27. VI. 1902; temperature at 2700 m. 

 and at the surface, + 1,67" C. and 3,40" C. resp. : 5 mature females and 4 juvenes; R. M. S. 307. 



Distribution: — South Atlantic Ocean and Antarctic Ocean between lat. 1" 8. and 

 lat. 65" S. 



The finds of the ,,A n t a r c t i c'' are consequently made within the area of distribution 

 stated bv G. W. MULi.EH. 



Imbricata group G. W. Muller 



{Conchoecissa C. Clals)*. 



This group, comprising five species, is certainly quite natural. I cannot say with certainty 

 whether C. prosadene G. ^\'. MULLEli belongs to it; it seems probable that it is not closely related 

 to these species. 



Conchoecia symmetrica G. W. MOller. 



Conchoecia symmetrica, G. W. Mullej!, 1906 a. p. J 17: pi. XX\TI, figs. 7, 8, 13. 1"), Ui. 



„ ., .. 1908. p. 78. 



„ „ „ 1912. p. 9(.. 



* G. O. Saks suggested as early us 1887 thai ,.l{iil'ic!/pris nuhnrala G. S. Urady" should be broken out as a 

 special genus, but all the sanu' hi- did nol Tiiake this himself, 



