66 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



Epiplocylis calyx (Brandt) Jorgensen 

 Epiplocylis calyx, Kofoid and Campbell, 1929, p. 177, fig. 328. 

 The short, conical lorica, with thickened suboral wall, 

 heavy surface reticulation, and sharp aboral horn, has a 

 length of 1.24 oral diameters. The oral margin is thin and 

 sharp. The bowl generally has a conical contour (25° in- 

 creasing to 57 and then to 93°), the angle being least in the 

 anterior 0.54 total length and gradually greater in the lower 

 bowl, and quite without sudden changes. The suboral 

 thickened region (0.28 oral diameter in width) bulges a trifle 

 beyond the general contour. The aboral horn tapers (20°), 

 has a length of 0.3 oral diameter, and is sharply pointed at 

 its free tip. 



The wall thickness is 0.06 oral diameter in the wide sub- 

 oral region and less than a third that much in the remaining 

 parts of the bowl. The upper 0.24 oral diameter is entirely- 

 free of surface lines or reticulations. There are only a few 

 very short free lines, the greater part of the surface being 

 heavily reticulated with large subcircular, moderately pitted 

 areas. 



Length, 75)1. 



Epiplocylis calyx resembles E. labiosa, but is shorter and 

 wider, with a thinner swollen suboral region, and generally 

 more conical bowl. Its lower bowl and horn are less abruptly 

 differentiated than in E. lata, and it has a shorter, wider 

 bowl and narrower free region than E. exigua. 



Recorded from six stations in the Atlantic, as follows: two 

 (18, 21) in the Sargasso Sea, and four (23, 24, 25, 30) in 

 the Atlantic equatorial region. 



There are 8 net samples, of which 4 each were taken at 50 

 and 100 meters. Frequency, 5 per cent at station 18; 2 per 

 cent at stations 24, 30; average, 2 per cent. 



Temperature, i4?6o-27?88 (20?84); salinity, 35.61-37.70 

 (36.41); density, 23.26-26.62 (25.37); P H > 7-93-8-30 (8.02). 



Epiplocylis carnegiei, new species 

 (Plate 1, figure 1 1) 

 The stout, squat, squarish acorn-shaped lorica has a 

 length of 2.5 oral diameters. The oral margin is rounded 

 over, thin, erect, and even. The bowl below is subdivided 

 into three sections. Of these, the first is a basal segment of 

 an inverted cone (53°), with a length of 0.54 oral diameter. 

 Its basal diameter is the widest level of the bowl, 1.53 oral 

 diameters. Its sides are regular with a bare tendency toward 

 lateral concavity. The second section is a basal segment of 

 an inverted truncated cone (25 ) with a length of 0.72 oral 

 diameter. Its aboral diameter is 1.11 oral diameters. Its 

 sides are somewhat flattened and regular. Between the above 

 two conical sections is a broad band with a width of 0.42 

 oral diameter. Its upper boundary is about 0.26 oral diam- 

 eter below the oral margin. Its lower boundary contracts 



tapering suboral section, has a length of 2.03 oral diameters. 

 The oral margin is thinly rounded, and there is some suboral 

 flare (30 ). The long bowl below the flare tapers (2°) for 

 0.5 total length and then becomes inverted conical (50°); 

 this section is almost 0.38 total length in length. Its trun- 

 cated lower end has a diameter of about 0.15 oral diameter. 

 The aboral horn (0.12 total length in length) is concave 

 conical (29°), and the free tip is blunt. 



The wall is thickest within the flaring section, where it is 

 0.07 oral diameter; in other parts it is half as much. There 

 are thin laminae which enclose hyaline material. The reticu- 

 lated region occupies the aboral 0.56 total length, the upper 

 third of which has minute circles and short, curved free 

 lines, the lowermost part having large, more or less circular, 

 sunken pitlike areas. 



Length, 120 to 158^1. 



The loricae of this expedition are longer and have fewer 

 free lines and often shorter aboral horns than usual, and 

 are much more trim than the one figured by Marshall 



(I934)- 



Epiplocylis blanda has free lines and a less blunt horn than 



E. obtusa. Epiplocylis impensa has different proportions, a 

 wider aboral cone, and relatively longer horn. Epiplocylis 

 mucronata is taller and of different proportions, and has a 

 much longer horn. Epiplocylis acuminata has a very long 

 horn, and a wide suboral band lacking in blanda. Epi- 

 plocylis sargassensis has a conical bowl, and the transition 

 between horn and bowl is more gradual. Once seen, blanda 

 is scarcely to be confused with the other species. 



Recorded from thirty-eight stations, seventeen in the 

 Atlantic and twenty-one in the Pacific, as follows: one (16) 

 in the Gulf Stream, five (17, 18, 19, 20-21, 21) in the Sar- 

 gasso Sea, seven (22, 23, 25, 27, 28, 29, 30) in the Atlantic 

 equatorial region, four (31, 32, 33, 34) in the Caribbean Sea, 

 five (47, 68, 71, 78, 80) in the Galapagos region, two (66, 

 67) in the South Pacific middle latitudes, three (81, 82, 83) 

 in the region of South Pacific island fields, three (100, 150, 

 151) in the North Pacific trade region, four (131, 136, 146, 



149) in the California region, one (145) in the North Pacific 

 middle latitudes, and three (152, 153, 154) in the Pacific 

 equatorial region. 



There are 3 pump and 51 net samples, of which 8 were 

 taken at the surface, 21 at 50 meters, and 25 at 100 meters. 



Maximum frequency, 99 per cent at station 131; other 

 records above minimum (2 to 52 per cent) from stations 



16, 17, 19, 20-21, 21, 22, 23, 27, 28, 29, 30, 31, 32, 33, 34, 71, 



78, 80, 81, 82, 100, 136, 145, 146, 150, 151, 152, 153, 154; 



averages, 9.2 and 13.0 per cent in Atlantic and Pacific net 



samples. 



Temperature: Atlantic, net samples i4?6o-27?88 (23?29); 



Pacific, net samples n?48-27?67 (2^07), pump samples 



i3?98-23?88 (i8?83). Salinity: Atlantic, net samples 35.70- 



37.05 (36.19); Pacific, net samples 33.24-36.33 (34.61), pump more quickly and assumes the contour of the bowl below. 



samples 33.24-35.96 (34.55). Density: Atlantic, net samples This band produces a swollen appearance, and its upper edge 



23.84-26.62 (24.80); Pacific, net samples 22.31-26.50 (24.30), separates the bowl into two regions differentiated by wall 



pump samples 24.42-25.03 (24.71). pH: Atlantic, net sam- characters. The lowermost of the three sections of the howl 



pies 7.93-8.32 (8.23); Pacific, net samples 7.76-8.38 (8.20), is a wide, inverted cone (8o°); its length is 0.42 oral diam- 



pump samples 8.23-8.39 (8.31). cter, and is the same as that of the band nearer the oral end 



