12 MICROSCOPICAL EXAMINATIONS 



Genus Bulimina, D'Orb. Shell free, spiral, turriculated, formed of an elon- 

 gated spire composed of cells which are arranged in a regular spiral axis, pro- 

 ject but little, are more or less envelloping, and the last of which is not prolonged 

 into a tube. Aperture longitudinal, comma shaped, or rounded, lateral on the 

 internal edge, or near the superior angle of the last cell. 



Bulimina auriculata, Bail., figs. 25, 26, and 27. Shell ellipsoidal, smooth or very 

 minutely punctate, sutures not very distinct. Aperture with an ear-shaped ap- 

 pendage. 



Several of these were found in the soundings marked No. 9,51 fathoms. 



Figs. 25 and 26 show the general form of the shell, and fig. 27 represents the 

 lower part of the shell with the auricular appendage more highly magnified. 



Bulimina turgida, Bail, figs. 28 to 31. Shell ovoidal, smooth, and having 

 several small dentate projections at the apex ; cells much inflated, separated by 

 deep sutures, aperture nearly symmetrical, with a raised border. 



Found in the soundings marked No. 9, 51 fathoms, and F, No. 24,49 fathoms. 



Figs 28, 29, and 30 show different portions of the same individual. Fig. 31 

 shows the lower part of fig. 28 more highly magnified. 



Bulimina serrata, Bail, figs. 32, 33 and 34. Shell minute, pyramidal, the 

 sutures, particularly in the upper part of the spire, strongly marked and serrated. 

 I noticed several of these very minute shells in the soundings No. 9, 51 fathoms, 

 and G, No. 31, 51 fathoms. 



Fig. 32 and 33 show two positions of the same shell ; fig. 34 shows the lower 

 part of fig. 32 more highly magnified. 



Bulimina compressa, Bail, figs. 35, 36 and 37. Shell elongated, somewhat 

 pyramidal, slightly compressed laterally, aperture a long cleft without any very 

 distinct margin. Occurs in "F, No. 24, 49 fathoms," in "F, No. 25, 105 fa- 

 thoms," and in -'G, No. 31, 50 fathoms." 



Figs. 35 and 36 show two positions of this shell, and fig. 37 represents the 

 lower part of fig. 36 more highly magnified. 



Genus Textularia, Defrance (Textilaria Ehr.) Shell free, regular, equi- 

 lateral, conical, oblong or wedge shaped, rugose or agglutinating •, formed of glo- 

 bular or wedge shaped cells, which regularly alternate at all ages on each side 

 of a longitudinal axis, and which are either partially envelloping, or are only 

 superposed on two alternate regular lines. Aperture semi-lunar, transverse, 

 lateral on the interior side of the last cell. 



Textularia atlantica, Bail, figs. 38 to 43. Shell large, pyramidal, three sided, 

 with one side flattened and the other two rounded and convex, having three 

 edges or carina, strongly marked near the apex of the shell, but one of which 

 (separating the two convex sides) nearly disappears on the lower part. Surface 

 quite rugose, color greyish. Aperture lunate, with a depressed margin. 



This large and well characterized species so much resembles to the naked 

 eye a fragment of gravel or sand, that it may be easily overlooked in soundings 

 where it is quite abundant, but when once seen it is easily recognised, even 



