KONPtL. SV. VK'P. AKADEMIKNS nANI)LIN(iAJ?. HANI) 26. N:() 2. 87 



32. D. boinbiformis Ci.. X. Sp. — V. deeply constricted in the middle, with broad seg- 

 ments. L. 0,0;',^; F>. 0,0 14 mm. (Jentral luxlnle small, its lioT'iis str-ongly diverge)it. Furrows nar- 

 row. Costa; ^4 in 0,0 1 mm. crossed by a longitudinal line. - PI. 1 t. 2(). 



Marine: Maca.ssar Sti-aits (Grove Coll.)! 



This form may be a small variety of D. Jl())iil)Hs. 



33. D. (■Icpsydni Cl. N. Sp. — V. strongly constricted, with almost orbicular segments. 

 L. 0,0:; B. 0,o;i2; at the constr. 0,010 mm. Central nodule large, ([uadrate; its horns divergent in 

 the middle. Furrows narrowed in the middle and at the ends, crossed by faint costa'. Costa; 7 

 in (t.oi mm. strongly radiate, alternating with single rows of alveoli. — PL I f. 29. 



Marine: Madagascar 



34. D. PraBstes A. S. (1875). — V. elongated, slightly constricted, with narrow elliptical 

 segments. L. 0,07 to 0,12; B. 0,0];) to 0,025; at the constriction O.o i r> to 0,017 mm. Central nodule 

 small, (piadrate; its horns parallel. Furrows linear, moderately narrow. Costse almost parallel, 

 () to 7 in 0,1)1 mm., alternating with rows of indistinct puncta. — Nnv. Prcpstcs A. S. Atl. XTI 

 f. 57, 58. 



Marine: Gulf of Naples (Tlmm.)! Alexandria (Deby Coll.)! Red Sea (Deby Coll.)! Mazatlan 

 (Atl.). Campeachy Bay (Atl.). 



1). Vrrtstcs is nearly allied to 7). Guitiardiatia, from which it differs by somewhat coarser 

 costa' and the rows of alveoli alternating with the costie. It seems to be very probable that 

 D. Guinardiana is only a corroded T). Prresfes. 



35. D. Entoinon (Ehb. 1844) A. S. — V. elongated, slightly constricted in the middle, with 

 tongnie-shaped segments. L. 0,o72 to 0, ir.; B. 0,o28 to 0,o42; at the constr. 0,026 to 0,.s5 mm. 

 Central nodule large, (quadrate, its horns parallel. Furrows moderately wide, linear, forjning a space 

 of about a third of the width of the valve, often dilated around the central nodule. Cosiae fi to 8 

 in 0,01 mm. parallel, at the ends divergent, anastomosing with a few (1 to 4) longitudinal, irregularly 

 undulating, more or less distinct, costal — Di})!. Enfonwn Ehb. Berl. Ber. 1844 accord to C'hase. 

 yar. Enfomon A. S. N. S. 1). PI. 1 f. 13, 14; Atl. XIII f. 48, 49. Nav. bomhoidrs rar. whUu Gmm. 

 A. 1). ]). 41 PI. Ill f. 54. Nar. homhnidis A. S. Atl. XIII f. 38. 



Marine: Arctic America! Spitsbergen! Kara! Finmark! North Sea! Mediterranean Sea! 

 Adria! Samoa! Sidney! China! Japan! Behrings Island! Mexillones, Peru (Deby Coll.)! Fossil: 

 Briinn, Tegel! Bory, Hungary! 



1). Eiifomon is not a sharply defined species, graduating as it seems into I), splcndida, with 

 whi(>h many of its varieties are closely connected. 



36. 1). spleiuliihi Greg. (185(5). — V. elongated, panduriform. L. 0,0.55 to 0,22; B. 0,02 to 

 0,or, ; at the constr. 0,0 1.5 to 0,03 mm. Central nodule large, quadrate; its horns parallel. Furrows 

 narrow, linear, not dilated around the central nodule. Ti^ansverse costffi 5 to8in0,oi mm.; crossed 

 on each side of the median line by 4 to 6, slightly curved or undulating longitudinal costae. — 

 Nav. splcndida Greg. T. M. S. IV p. 44 PI. V f. 14. V. H. S. PI. IX f. 4. A. S. N. S. D. 

 PI. I f. 3, 4, PI. II f. 2. Atl. XIII f. 31, 32, 34. Nar. Entomon Donk. B. J), p. 49 PL VII f. 5. 

 Nav. didyma vat: Greg. T. M. S. IV p. 45 PL V f. 16. Nav. f/cniwahda Cl. Quek. M. Cl. II (2) 

 p. 167 pi. XII f. 1 (1885). Nav. Tasclwnhenjvri A. S. Atl. CLXXIV f. 9; 1892 (a large and coarse 

 form). N. marf/aritifh-a Pant. Ill PL XXX\ f. 494 (1893)? 



Marine: (Greenland! Spitsbergen! Beeren Eiland! Finmark! North Sea! Ceylon! Madagascar! 

 Java! Sumatra! Port Jackson! Japan! Sandwich Islands (Atl.). West Indies! Florida! Fossil: 

 Moravian Tegel! S:a Monica, Calif.! 



