300 REPORT OF NATIONAL MUSEUM, 1897. 



MILIOLINA UNDOSA Karrer. 

 (Plate 45, fig. 4.) 



In this species of Miliolina the exposed portions of the segments are 

 angular instead of being rounded or having a single sharp margin. 

 Moreover, the angles of the segments are wavy, giving a crumpled 

 appearance to tbe shell. 



Locality. — Straits of Yucatan (station 2358), 222 fathoms. 



MILIOLINA ANGULARIS, new species. 

 (Plate 46, fig. 1.) 



An angular variety of Miliolina resembling M. undosa, except that 

 the visible angles of the segments are very nearly right angles, slightly 

 ribbed at the edges, and not sinuate. 



Locality. — Straits of Yucatan (station 2358), 222 fathoms. 



MILIOLINA BICORNIS Walker and Jacob. 

 (Plate 46, fig. 2.) 



Oval, compressed, the final segment projecting posteriorly well beyond 

 the preceding segment, and generally produced into a tubular neck 

 anteriorly. The whole surface is striate, with rather fine, parallel, 

 raised lines. Aperture round and toothed. 



Localities. — Straits of Yucatan and coast of Florida (stations 2358, 

 2641), 60 to 222 fathoms. 



MILIOLINA LINN^ANA d'Orbigny. 

 (Plate 46, fig. 3.) 



Contour oval, compressed, much the same as M. bicornis; the surface 

 marked with a few thick, irregular costa- in place of the stria' charac- 

 teristic of the latter species. 



Localities. — Straits of Yucatan, the Gulf of Mexico, coast of Florida 

 (stations 2358, 2315, 2370, 2641, 2629), 13 to 222 fathoms. 



MILIOLINA SEPARANS Brady. 

 (Plate 46, fig. 6.) 



A single specimen of this species has been found. It has much the 

 appearance of two small Miliolina Unnceana grown together at the side, 

 but the smaller portion has no neck or external operture, and the form 

 is undoubtedly due to the irregular growth of the later segments. 

 Length, about 0.8 mm. (.^ inch). 



Locality. — Gulf of Mexico, off the west coast of Cuba (station 2352), 

 463 fathoms. 



