Sludifs (III marine Oslracods 689 



of till' .species dealt with below, C. spinirostris, to the other species of this group. With regard 

 to this cf. p. 616 above. 



Besides the forms included by G. W. MILLER the species C. zetesios, established by 

 (t. H. Fowler, 1909, also belongs to this group. This species cannot, however, be retained; 

 as I hope to be able to show in a following work, we are only concerned here with non-mature 

 individuals of C. macrocheira G. W. MCll-RR. 



Conchoecia lophura G. W. Muller 



Conchoecia lophura, (i. W. MOller, 1906 a, p. 99; pi. XX, figs. 1—10. 

 „ „ „ 1906 b, p. 6. 



„ „ „ 1908, p. 78. 



hijalophyUum (part.), G. H. FowLER, 1909, pp. 236, 265; j)!. XIX. ti.us. 90 to 



92. 102; pi. XX. figs. 103. 1()4. 

 luphuru, G. W. .MiLLLii, 1912, p. 82. 



Description: — Sec G. W. Muller, 1906 a, j). 99. 



Supplementary description: — Male: — 



Shell: — Length: According to G. VV'. MCLLER 2,2 — 2.8 mm. The .specimen investig- 

 ated by me measured 2,65 mm. Length : height about 1,9 : 1; length : breadth about 2,1 : 1. 

 Seen from the side it is of about the type described and reproduced by G. W. Mt'LLER; 

 cf. the accompanying fig. 1. Seen fro m b c 1 o w it has its greatest width at about the 

 middle and its anterior and posterior parts about equal in size. Li front of the middle the side 

 contours are evenly curved, the anterior end is broadly rounded with a symmetrical rostrum; 

 behind the middle the side contours are undulated in about the same w^ay as in the accompanying 

 tig. 2, the posterior end is somewhat pointed. The surface of the shell is bare; no 

 sculpture was perceptible on the specimen investigated by me. Seen from inside: 

 Selvage: On the rostrum this is smooth-edged and without any spine. Along the anterior margin 

 of the shell and the anterior half of the ventral margin it is extremely finely serrulated, almost 

 smooth ; along the posterior half of the ventral margin it is finely serrulated. Along the posterior 

 margin of the shell it is more or less coarsely and irregularly serrulated and scratched and partly 

 furnished with small leaf-like appendages of the tyj)e that is reproduced in my fig. 4 of ('. sym- 

 metrica. The glands are as described by ('<. W. MClllr. The glands along the posterior margin 

 of the shell are of about the same type as has been described for C. Gaussi, but the little group 

 of three or four glandular exits is absent. There is a ratlier well developed oval hinge-socket 

 and hinge-tooth at the posterior dorsal corner. 



First antenna: — This is of the type described and reproduced by G. \\. MCller ; 

 in the specimen investigated by me the a-bristle was somewhat longer than the second joint 

 of this antenna (see the accompanying fig. 3). E-bristle: On the anterior side of this bristle 



Zoolog. bidrug, Uppsala. Suppl.-Btl. I. ^ 



