234 



UNITED STATES NATIONAL MUSEXJM BXJLLETIN 216 



The species is named in honor of Dr. K. Asano, in recog- 

 nition of his work on this genus, as well as the other 

 groups of Foraminifera. 



Types and occurrence: Holotype (USNM P4880), 

 figured paratypes (USNM P4267a-c), and unfigured 

 paratypes (USNM P4268) from Challenger Station 24, 

 lat. 18°38'30" N., long. 65°05'30" W., at 390 fathoms, 

 in the Caribbean Sea. 



Cruciloculina ericsoni Loeblich and Tappan, new species 

 Plate 74, Figures 3-7 



. Test free, ovate in section, nearly circular in side 

 view, chambers trUoculine in arrangement, final cham- 

 ber with considerable overlap of earlier chambers, the 

 margins of the chambers with a slight flange, which 

 leaves a groove paralleling the suture at the contact 

 with earlier chambers; sutures distinct, slightly in- 

 cised; wall calcareous, imperforate, siu-face smooth; 

 aperture triradiate in young specimens, becoming cru- 

 ciform to dendritic in the adult, bordered by a distinct, 

 slightly recurving lip. 



Length of holotype 1.08 mm., breadth (from center 

 of final chamber to opposite side) 1 .05 mm. 



Remarks: Cruciloculina ericsoni, new species, dif- 

 fers from C. japonica Asano in being smaller and more 

 inflated, nearly circular in side view, and in lacking 

 distinct angles; and in the slight chamber flange bor- 

 dering the sutures. The apertural lip is also some- 

 what more prominent. 



The species is named in honor of David Ericson in 

 recognition of his work on deep sea cores. 



Types and occukhence: Holotype (USNM P3140) 

 and figured paratypes (USNM P4338a-d) from F. C. 

 Helga Haul SE 331, southwest Ireland, lat. 51°12' N., 

 long. 11°55' W., at a depth of 610 to 680 fathoms. 



Cruciloculina japonica Asano, 1949 



Plate 74, Figure 12 



Cruciloculina japonica Asano, Journ. Palentol., vol. 23, no. 5, 

 p. 480, pi. 80, figs. 1-2, 6-13, 1949. 



Test free, triloculine in chamber development, sub- 

 triangular in section with rounded angles, final chamber 

 with considerable overlap of the earlier chambers, so 

 that the final chamber covers nearly one-half the width 

 when the test is viewed from the side showing the 

 oldest of the three final chambers; sutures distinct, 

 slightly incised; wall calcareous, imperforate, surface 

 smooth; apertm-e triradiate in young specimens, then 

 becoming cruciform and finally dendritic in adult 

 specimens, with a narrow bordering lip. 



Length of figiu-ed topotype 1.63 mm., greatest thick- 

 ness, from center of last chamber to opposite angle, 

 1.43 mm., although the majority of specimens are 

 somewhat smaller. 



Remarks: Cruciloculina japonica Asano differs from 

 C. triangularis d'Orbigny in being slightly smaller, 

 and much less distinctly triangular, with more convex 

 sides and rounded angles. The aperture of C. japonica 

 also tends to become more complexly dendritic. 



Types and occurrhnce: Figured topotype (USNM 



P4339) and unfigured topotypes (USNM P3221, 

 P4864) from the Late Pliocene Sawane formation in a 

 sea cliff facing Mano Bay, Sawane-Machi, Sado-Gun, 

 Niigata Prefecture, lat. 37°59'47" N., long. 138°16'43" 

 E., Japan. Collected by T. Uchio. 



Unfigured topotypes (USNM P63) from the same 

 locality. Collected by K. Asano. 



Cruciloculina striata Loeblich and Tappan, new species 



Plate 74, Figures 13-16 



Test free, medium in size, robust, sides convex, 

 subovate in section; chambers arranged as in Trilo- 

 culina, inflated, with considerable overlap of earlier 

 chambers; sutures distinct, flush to slightly incised; wall 

 calcareous, imperforate, surface ornamented by numer- 

 ous very fine longitudinal striae; aperture triradiate 

 in young specimens, cruciform to dendritic in older 

 specimens. 



Length of holotype 1.04 nam., thickness from center 

 of final chamber to opposite side 0.96 mm. Paratypes 

 range from 0.73 to 1.09 mm. in length. 



Remarks: Cruciloculina striata, new species, is 

 closest to C. ericsoni, new species, in general form, but 

 differs in the presence of the vertical striae which are 

 characteristic of the present species. 



Types and occurrence: Holotype (USNM P4264), 

 flgured paratypes (USNM P4265a-c), and unfigured 

 paratypes (USNM P4266) all from Challenger Station 

 24, lat. 18°38'30" N., long. 65°05'30" W., in the 

 Caribbean Sea at 390 fathoms. 



Cruciloculina triangularis d'Orbigny, 1839 



Plate 74, Figures 1, 2 



Cruciloculina triangularis d'Orbigny, Voy. dans I'Amerique 

 M6rid., Foraminifferes, p. 72, 1839. 



Test free, triloculine in chamber development, tri- 

 angular in section, with sides equal in breadth and flat 

 to very slightly convex and angles acute ; chambers 

 increasing regularly in size with final chamber only 

 moderately overlapping earlier chambers; sutures 

 distinct, very slightly incised; wall calcareous, imper- 

 forate, surface smooth; apertiu-e typically cruciform, 

 with the extremities tending to become dendritic in 

 larger specimens, bordered with a narrow lip. 



Length of lectotype 1.28 mm., greatest thickness 

 (from center of final chamber to opposite angle) 1.13 

 mm. The topotype here figm-ed is 1.9 mm. in length 

 and the breadth of the final chamber is 1.68 mm. 



Remarks: This species is characterized by the 

 sharply triangular section, large size, and relatively 

 simple cruciform apertm-e. 



Types and occurrence : Lectotype (here designated 

 and figured) of C. triangularis d'Orbigny in the Museum 

 National d'Histoire NatureUe, Paris, France, from 

 Recent dredgings near the Falkland Islands. Figured 

 topotype (USNM P4520) and unfigured topotypes 

 (USNM P4521) from R. R. S. Discovery Station 144, 

 from lat. 54°04' S., long. 36°27' W., to lat. 53*58' S., 

 long. 36°26' W., off the mouth of Stromness Harbor, 

 depth 155-178 meters. South Georgia. 



