ShidifS on inai'inc Ostrarods 689 



of the species dealt with heh)\v, ('. .s'pinirostriti, to the other species of this group. \\'ith regard 

 to this cf. p. 616 above. 



Besides the forms included by 0. W. Muller the species C. zetesios, established by 

 (t. H. Fowi.Ei;, 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. macrocheirn (I. W. Muller. 



Conchoecia lophura G. W. Muller 



Conchoecia lofhura, 0. W. Muller, 1906 a, p. 99; pi. XX, figs. 1—10. 

 „ „ „ 1906 b, p. 6. 



„ .. ., 1908, p. 73. 



hyalophyllum (part.), U. H. FOWLER, 1909, pp. 236, 265; pi. XIX, figs. 90 t(j 



92, 102; pi. XX, figs. 103, 104. 

 lophura, G. W. MtiLLER, 1912, p. 82. 



Description: — See G. W. Muller, 1906 a. p. 99. 



Suppletnentary description: — Male: — 



Shell: — Length: According to G. ^^^ Muli>er 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 f r o m the side it is of about the type described and reproduced by G. W. MUller ; 

 cf. the accompanying fig. 1. S e e n f r o m b e 1 o w it has its greatest width at about the 

 middle and its anterior and posterior parts about equal in size. In 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 way as in the accompanying 

 fig. 2, the posterior end is somewhat pointed. The surf a c e 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 finelv 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 type that is reproduced in my fig. 4 of ('. sym- 

 metrica. The glands are as described by G. W. MULLER,. 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 rather well developed oval hinge-socket 

 and hinge-tooth at the posterior dorsal corner. 



First antenna: — This is of the type described and reproduced by (4. \V. .Muller ; 

 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. bidr.ig, Uppsala. Suppl.-Bd, f. 87 



