SUiilies on nuirint; Oslracods 1'17 



here are tou small to enable us to ascribe any great importance to them. In this connection 1 will 

 only quote G. W. Muller's statement, 1906 a, p. 52: ,,Der Versuch von Clals, den Bau des Kaufort- 

 satzes der Mandibel einerweiterenEinteilungzuGrundezulegen, schcintmirnichtdurchfuhrbar." 



These writers have not taken other organs into consideration in making this classification. 

 Purely from the point of view of habitus this group includes rather heterogeneous elements; 

 cf., for instance, C. caudata, C. dasyophthahna and C. oblonga. 



Is not C. decipiens, for instance, which belongs to the Procera group, considerably more 

 closely related to C. oblonga than the latter is to,, for instance, C. dasyophthalma or C. candata'i 



As has been pointed out above, no answer as to the naturalness of this group can yet 

 be given. For this a new and comprehensive investigation of the species in it is necessary. 



Conchoecia oblonga (C. Claus). 



Paniconchoeciu oblomja, ('. ("LAl's, 189U, p. 13. 



Conchoecia variabilis (part.), G. AV. MiJLLEl!, 1890 a, p. 273; pi. XXVIII, figs. 27 ami 38. 

 Paraconchoecia oblonga, C. Glaus, 1891a, p. 63; pi. VIII, figs. 10 and 11; pi. IX. 

 Conchoecia oblonga, G. W. MCllek, 1906 a, p. 58; pi. IX, figs. 11—13, 16—25. 



„ „ „ 1906 b, p. 3. 



V. VAVKA, 1906, p. 38; pi. II, figs. 21—28. 



G. W. Mf'LLEH, 1908, p. 66. 



., „ ,. 1912. p. 69. 



(Non Paraconchoecia oblonga, C. Clals, 1894, p. 3; P. oblomja, P. T. Cleve, 1900, p. 40 

 and Conchoecia oblonga, G. W. MCLLEH, 1890 a, p. 272.) 



Description: — See C. Clai s, 1891a, p. 63 and G. W. MCllek, 1906 a, p. 58. 



Supplementary description: — Male: — 



Shell: — Length, according to G. W. MCllek, 1906 a, ,,ziemlich konstant 1,45 mm.", 

 according to V. VAvha, 1906, 1,2—1,3 mm. The lengths of the specimens investigated by me 

 varied between 1,40 mm. and 1,6 mm. Length : height about 2,3 : 1; length : breadth about 

 2,3 : 1. Seen from the side it has about the same type as is reproduced in the accom- 

 panying figure 1, i. e. the posterior part of the shell is not larger than the anterior part. With 

 regard to this characteristic the specimens investigated by me differed from the type reproduced 

 by G. W. MUller, 1906 a, in pi. IX, fig. 11. (This figure certainly represents a female, but 

 G. W. MOller does not mention the existence of any difference between the sexes in this 

 respect; cf. vmder the description of the female shell below.) On the other hand the 

 figure of the male shell in this species given by C. Claus, 1891 a, pi. IX, fig. 9 agrees in this 

 respect with the type found by me. Seen from below, fig. 2, it has its greatest breadth 

 at or just in front of the middle, its side contours are imiformly curved, it is broadly rounded 

 anteriorly with a rostrum that is almost symmetrical, and is pointed posteriorly. The shoulder 

 vault is always powerful, but was never sharp-edged in the specimens investigated by me. The 



Zoolos bullae', lj|)|isat:i. Suii|il.-J!J. |. ' 



