120 MR F. GORDON PEARCEY ON 



Biloculina ringens (Lamarck). 

 Found (rare) at three stations, 346, 420, and 459. It occurs in all seas and at 



all depths. 



Biloculina depressa, d'Orbigny. 



Taken sparingly at six stations, 342, 420, 447, 459, 467, and 468. It has a world- 

 wide distribution and a great bathymetrical range. 



Biloculina serrata, H. B. Brady. 

 This characteristic species has been found in material from two stations, 342 



and 459 (rare). 



Biloculina murrhyna, Sch wager. 



This species was also taken (rare) at Stations 342 and 459. Both this and the pre- 

 ceding species are characteristic of a Globigerina ooze-deposit. 



Biloculina tubulosa, Costa. 

 A few specimens of this species were obtained from Station 459, 1998 fathoms. 



Genus SPIROLOCULINA, d'Orbigny. 



Spiroloculina tennis (Czjzek). 

 Taken (rare) in the Scotia material at Station 459, 1998 fathoms. 



Spiroloculina limbata, d'Orbigny. 

 Obtained at Station 342, 1946 fathoms. 



Genus MILIOLINA, Williamson. 

 Miliolina dentistoma, sp. nov. (Plate II. figs. 17-19.) 



Test triloculine, broad, compressed ; peripheral margins thick and rounded ; visible 

 chambers, three or four ; the last chamber appears always imperfectly formed, with a 

 deep transverse suture. 



Aperture a wide, irregularly curved fissure, with a thick lip-like margin from which 

 rise one or more short tooth-like projections. Two strong, prominent teeth situated a 

 short distance inside the mouth, at the base of the apical opening, are not observable 

 in a lateral aspect (see figs. 17-18, Plate II.). 



Chamber walls smooth, and glazed externally, at times wavy. The length of the 

 figured specimen is about -^- inch (0'95 mm.). 



Miliolina dentistoma was obtained in moderate numbers at Station 346, 56 fathoms. 



Miliolina venusta (Karrer). 



This distinct variety was found at five stations, 342, 346, 447, 459, and 467 (few or 

 rare). Miliolina venusta is essentially a deep-sea form ; so far as I am aware, it has 



(ROY. SOC. EDIN. TRANS., VOL. XLIX., 904.) 



