NO. 5 FORAMINIFERAL GENERA — LOEBLICH AND TAPPAN 1 5 



Diagnosis. — Test free, early portion quinqueloculine, later tending 

 to become planispiral and involute with three chambers per whorl and 

 only those chambers of the last whorl visible ; wall calcareous, porcel- 

 laneous, imperforate; aperture consisting of numerous irregularly 

 shaped pores extending up from the periphery over a broad area of 

 the apertural face. 



Discussion. — This genus is closest to Hauerina d'Orbigny but differs 

 in being almost globular rather than compressed, and in being in- 

 volutely coiled rather than showing many of the early whorls as does 

 Hauerina. 



INVOLVOHAUERINA GLOBULARIS Loeblich and Tappan, new species 

 Plate 2, figures 3-8 



Diagnosis. — Test free, subglobular in form, early portion quinque- 

 loculine, later becoming planispiral and involute, although some speci- 

 mens are somewhat off center, only the three chambers of the last 

 whorl visible externally, except in a single specimen, which is suffi- 

 ciently off center to allow four chambers to be visible, periphery very 

 broadly rounded ; sutures distinct, slightly depressed ; wall calcareous, 

 porcellaneous, imperforate, surface smooth, but very minutely pitted ; 

 aperture consisting of numerous irregularly shaped pores extending 

 up from the periphery over a broad area of the apertural face. 



Greatest diameter of holotype 1.93 mm., least diameter 1.41 mm., 

 greatest thickness 1.85 mm. Other specimens vary from. 1.66 to 2.68 

 mm. in diameter. 



Types and occurrence. — Holotype, figure 3 (U.S.N.M. No. P 2202), 

 and paratypes of figures 4-7 (U.S.N.M. No. P 2203a-d) and unfigured 

 paratype B.M.N.H,, London, from Albatross station D 2035, I'^t. 

 39°26'i6" N., long. 70°02'37" W., depth 1,362 fathoms, Glohigerina 

 ooze; paratype of figure 8 (U.S.N.M. No. P 2204) from Albatross 

 station D 2859, lat. 55°2o'oo" N., long. i36°2o'oo" W., bottom tem- 

 perature 34.9° F., depth 1,569 fathoms, gray ooze. 



Discussion. — This species is closest to Hauerina involuta Cushman 

 in general chamber arrangement, but differs in being subglobular in 

 form, and not compressed with an acute periphery. H. involuta also 

 has an ornamented surface, showing distinct transverse ridges, crossed 

 by fine striae. 



Genus TRISEGMENTINA Wiesner, 1920, emended 



Original description. — Zool. Anzeig., vol. 51, p. 18, 1920. 

 Type species. — Trisegmentina compressa Wiesner, 193 1. Subse- 

 quent designation by Wiesner, 1931, p. 70 (see discussion below). 



