PAL^OTROPUS LOVENI, 



171 



genital c(jniponents, tlie presence of two genital pores, as in P. Joaephiua;, 

 Fig. 247 {1\ Lovcid has three, Fig. 240). The outline of tlie test of P. 

 Loveni and of P. J<>8ci>]dnw is very different ; in the former the anterior 

 part is narrow while the posterior extremity is wide, the reverse being the 

 case in P. Josepldncv, Fig. 249, but as P. Joscphincc is only known from 

 young specimens this difference may be due to age. The shape of the 

 episternal plates is very different in the two species ; in P. Loveni the fourth 

 pair is triangular, Fig. 250, 

 the point turned anteriorly, 

 while in P. Josephince their 

 position is reversed and they 

 reach the anal system, Fig. 

 251. 



Fig. 249. P. Josephin.e. 



After Lov&i. 



6< 



23 mm. 



Fig. 250. Pal^eotkopcs Loveni. 



Fig. 251. P. Josephine. 



Ajtbr Lovts. 



The species of Palaeotropus described by Koehler ^ differs strikingly from 

 the other species of the genus. The sternum differs radically from that of 

 the other species ; the genital plates are distinct, and the arrangement of the 

 apical plates does not resemble that of either P. Josephinm or P. Loveni 

 The small number and proportionally great size of the primary tubercles 

 give P. Hirondellei a very striking appearance. 



"Challenger" Expedition Station 201, January 25, 1875. Lat. ^ 26' N. ; 

 Long. 123° 45' E. ; 375 fathoms. Bottom temperature, 12^ 2. Mud. 



1 Koehler, loc. cit. PI. V, figs. 12-14. 



