298 REPORT OF NATIONAL MUSEUM, 1897. 



MILIGLINA AUBERIANA d'Orbigny. 

 (Plate 43, tig. 6.) 



Larger tbau M. sejninulmn, aud with tlie margins of the segmeuts 

 more sharply angular. Section shows the triangular contour of the 

 shell and the characteristic milioline arrangement of the chambers. 



Localities. — Atlantic coast of the United States, off the island of 

 Trinidad, and off the coast of Brazil (stations 3150, 2570, 2584, 2754, 

 2760), 400 to 1,800 fathoms. 



MILIGLINA CUVIERANA d'Orbigny. 

 (PJate43, fig.4.) 



A rather large, smooth- shelled variety, characterized by the acutely 

 angular margins of the five visible segments. 



Localities, — Coast of Brazil (station 2762) and the Gulf of Tokyo, 59 

 and 9 fathoms. 



MILIOLINA VENUSTA Karrer. 



(Plato 44, fig. 2.) 



Oval, angular, the margins of the three final segments extended so 

 as to form well-marked keels; oval extremity of the last segment gen- 

 erally protuberant. Length, about 0.625 mm. (^ inch). 



Localities. — West coast of Patagonia (station 2784) and Gulf of Tokyo, 

 194 and 9 fathoms. 



MILIOLINA CIRCULARIS Bornemann. 

 (Plate 44, fig. 1.) 



Smooth, slightly compressed, nearly circular in broadest outline; 

 chambers intlated; aperture a crescentic slit with arched upper and 

 thin projecting lower lij). Length, about 0.75 mm. (/. inch). 



Localities. — Oft" Cape Hatteras, west coast of Cuba, aud Trinidad 

 (stations 2115, 2333, 2754), 167 to 8S0 fathoms. 



MILIOLINA TRIGONULA Lamarck. 

 (Plate 44, fig. 3.) 



Oblong, broad, oval in end view, exposing two chambers on one side 

 and three, rarely four, on the other; oral end of the final segment often 

 tubular; aperture round, with T-shaped valvular tooth. Transverse 

 section of a broad specimen shows arrangement of the chambers; 



Localities. — Atlantic coast of the United States and the Gulf of 

 Mexico (stations 2228, 2570, 2385), 700 to 1,800 fathoms. 



MILIOLINA TRICARINATA d'Orbigny. 

 (PIt.te44, fig.4.) 



Distinctly triangular in end view, the three angles thickened and 

 slightly produced or keeled. Two of the angles are formed by the last 



