(iOl) TAOK SKOOSHKRO 



In tlu> case of //. dtibui U. W. MOi.l.KH and its van major the synonyiiiiz.itidii is based 

 on (J. \V. Mt'LLKU's own stateinonts. 



1 was somewhat doubtful wlu-thcr to identify H. pdagica, Cll. JliD.W, 1906, witli the 

 spocios discussed b\- nic above, because this foiiii comes from the west coast of America. The 

 figures given by this writer decidedly support this procedure, however; fig. f) in plat(> Vll, 

 according to which the first antenna has six joints — the first joint is divided into two joints 

 of equal length in this figure — is certainly incorrectly drawn. 



The figures of H. injlaia and //. </fo6osa given by Til. ScOTT, 1912a, are exceedingly deficient 

 and uncertain, but they indicate with a fair amount of certainty that the former species is 

 identical with the male, and the latter species with the female, of the form dealt with by me 

 above. It is to be noted that this writer calls the male reproduced on pi. XIII, figs. 29 — 31, 

 a female! 



The following synonyms among those included above liave no verificatory descriptions 

 and figures, but, in spite of this, tliey seemed to me certain for one reason or other: H. concha + 

 H. pdagica, G. S. Brady, 1897, H. conclui, A. Scott, 1905, H. pelagica, P. T. Clevk, 1905, 

 H. inflata, G. W. MOLLER, 1906 b, 1908, H. concJia + H. pelagica, V. VAvRA, 1906. 



On the other hand it did not seem right to include H. hrevirostris. Til. ScOTT, 1894, p. 141, 

 a form that is also without any identifying figures or description. The uncertainty in this in- 

 vestigator's work of 1912 a, which is pointed out above, seems to be sufficient reason for this. 

 Larvae. The larvae of this species found by me in the material of the ,,A n t a r c t i c" 



Expedition all clearly belonged to the last larval stage. Both males and females were 

 found. In both sexes the shells were of about the same type as that which is characteristic 

 of the mature female and showed very slight variation with regard to length; 1,0 — 1,1 mm. 

 was observed. The number of furcal claws on these specimens varied from six to seven. Several 

 of the females among these larvae had eggs in the ovary in a rather advanced state of development, 

 so that these larvae were rather difficult to distinguish from the mature females, whose eggs 

 are often no farther developed; the same observation was previously made by G. W. MULler, 

 1906 a, with regard to the material of the „V a 1 d i v i a" expedition. This fact, like the length 

 of the larvae, seem to make it probable that the species H. pelagica of several of the preceding 

 authors represent larval specimens of the species dealt with above. 



Habitat: — Atlantic Ocean: 



S. A. E., PI. station 30, lat. 290 52' K, long. 20« 14' W.; at the surface; 7. XL 1901; 

 temperature, 21,1" C: 1 mature male; R M. S. 199. S. A. E., PI. station 4 b, lat. 25« 51' N., 

 long. 21" 29' W.; at the surface; 9. XI. 1901; temperature, 22,5" C: 3 mature males and 7 larvae; 

 R. M. S. 189. S. A. E., PI. station 38, lat. 250 46' N., long. 21" 31' W.; at the surface; 9. XI. 

 1901; temperature, 22,5" C: 1 mature male; R. M, S. 200. S. A. E., PI. station 6 b, lat. 

 23035' N., long. 220 19' W.; at the surface; 10. XI. 1901; temperature, 23" C: 1 mature 

 male; R. M. S. 190. S. A. E., PI. station 7 b, lat. 22o 26' N., long. 220 45' \V.; at the surface; 

 11. XI. 1901; temperature, 23,6" C: 1 mature male; R. M. S. 191. S. A. E., PI. station 45, 

 lat. 220 8' N., long. 22" 52' W.; at the surface; 11. XI. 1901; temperature, 23.3o C: 1 mature 



