studies on marine Ostracods 



509 



A. aberrata is probably very closely related to the species that was described by G. 0. Sars, 

 1887, p. 28, under the name of A. ellipiica PlllLIPl'l. This species is stated by this writer partly to 

 have been caught at Messina (thus near Palermo, the type locality for this species of PllILIPPl's*) 

 and partly at Cape Breton 

 in the Bay of Biscay. There 

 does not seem to be full 

 identity, however, as the 

 species described by G. 0. 

 Sars has, according to pi. 

 IV, fig. 1, numerous (23) 

 posterior ventral bristles on 

 the sixth limb and thirteen 

 bristles on the seventh 

 limb. It does not seem 

 impossible, however, that 

 these and some other rather 

 small differences may be 

 due to the somewhat super- 

 ficial way in which G. 0. 

 Sars has described and 

 reproduced this form. In 

 order to verify these state- 

 ments of G. 0. Sars's I wrote 

 to this author and asked 

 for the type specimen of his 

 re-description. In answer to 

 my request Professor Sars 

 informed me that all his 

 specimens of this species had 

 unfortunately been lost, ap- 

 parently without any hope of 

 their ever being found again. 

 For the possibility 

 of identifying A. PhilippI's 

 species A. elUptica see 

 above, p. 468. 



G. S. Brady and A. M. Norman describe, 1896, p. 634, under the name of A. eUiptica 

 A. PHlLlPi'I, a form from Valentia, Ireland, i. e. from a locality not far from the type locality 

 for the species described by me above. This form is also certainly very closely related to this 

 species of mine, but differs so essentially from it in the shape of the shell (pi. LII, figs. 16 and 17) 



* G. O. Sars stales, 1887, p. :)0. Iiy an oversighl. Ihal Uif type loc alil.v was tlir Hay ol Naples. 



lii'lations 

 to other species. 



XCVII. 



Aslernpc aberrata n. sp., $. 



inli: 205 X. 



