120 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



Recorded from thirteen stations in the Pacific, as follows: 

 two (37, 152) in the Pacific equatorial region, two (68, 78) 

 in the Galapagos region, three (96, 158, 159) in the region 

 of South Pacific island fields, and six (103, 104, 105, 107, 

 108, is' ) i' 1 the North Pacific trade region. 



There are 11 pump and 7 net samples, of which to were 

 taken at the surface, 7 at 50 meters, and 1 at 100 meters. 

 Maximum frequency, 5 per cent at station 151; other records 

 above minimum (2 to 3 per cent) from stations 152, 159; 

 average in net samples, 2.1 per cent; in pump samples there 

 were 2 loricae at station 151, the frequency in all others 

 being minimum. 



Temperature: pump samples i8?6o-29?3<) (25^43), net 

 samples n?48-28?6o (22?88). Salinity: pump samples 

 34.02-35.95 (34.98), net samples 31.68-36.03 (34.78). Den- 

 sity: pump samples 21.95-25.15 (24.08), net samples 20.20- 

 26.50 (25.06). pH: pump samples 8.14-8.25 (8.21), net 

 samples 7.76-8.39 (8.38). 



Eutintinnus elegans (Jorgensen) Kofoid and Campbell 

 Tintinnus elegans, Kofoid and Campbell, 1929, p. 333, fig. 630. 



The rather short, slender lorica, with median bulge and 

 flaring ends, has a length of 6.0 oral diameters. The thin 

 oral margin has a narrow, molded brim. The suboral funnel 

 flares (22 ) within 0.67 oral diameter, and its aboral diam- 

 eter is 0.73 oral -diameter. The shaft gradually swells to a 

 diameter of 1.0 oral diameter within a rather lengthy region 

 (0.64 total length), with the maximum diameter at 0.43 total 

 length from the rim. The posterior region contracts (12 ) 

 for approximately 0.12 oral diameter, with a diameter of 0.73 

 oral diameter at the lower end. Below the lower end the 

 aboral flare (28 ) expands to the rimless aboral end, the 

 diameter of which is 0.9 oral diameter. 



The exceedingly thin wall is hyaline. 



Length, 147 to 190J.1. 



Eutintinnus elegans is shorter than E. brandti and longer 

 than E. medius. It is much more contracted aborally than 

 either of these species, but has a median bulge unlike E. 

 macilentus. 



Recorded from three stations in the Pacific, as follows: one 

 (47) in the Galapagos region, one (49) in the region ol 

 South Pacific island fields, and one (53) in the South Pacific 

 middle latitudes. 



There were 3 pump samples, of which 2 were taken at the 

 surface and 1 at 50 meters. Frequency, 2 loricae at station 

 55; average, 1.3. 



Temperature, 2i?44-23?88 (22^83); salinity, 35.76-36.17 

 ( 55.96); density, 24.42-24.96 (24.70); pH, 8.20-8.27 (8.23). 



Eutintinnus elongatus (Jorgensen) Kofoid and Campbell 



Tintinnus elongatus, Kofoid and Campbell, io:><). p. 534, fig. 

 631. 



The elongated lorica, with both ends flaring, the oral end 

 with brim, and with gradual even contraction in the shaft, 

 has a length of 7.5 oral diameters. The oral margin is thin 

 and has a narrowed, molded brim. The concave suboral 



flaring (15 ) region is well within the upper tenth of the 

 contracted (5 ) shaft. The diameter of the shaft at its 

 lower end is nearly 0.43 oral diameter. Below this level it 

 flares (35°) more widely than suborally. and the lower, 

 open, brimless aboral end has a diameter of 0.57 oral diam- 

 eter. 



The thin, hyaline wall is uniformly 0.0 1 oral diameter in 

 thickness. 



Length, 493 to 500)1. 



Some of the Carnegie loricae are a little longer than usual 

 lor this species. 



Eutintinnus elongatus lacks an aboral brim. It is less 

 wide aborally than E. binctus. 



Recorded from fourteen stations, two in the Atlantic and 

 twelve in the Pacific, as follows: one (3) in the Atlantic 

 drift, one (34) in the Caribbean Sea, two (45, 77) in the 

 Galapagos region, three (48, 49, 89) in the region of South 

 Pacific island fields, three (52, 54, 55) in the South Pacific 

 middle latitudes, one (109) in the North Pacific trade region, 

 one (137) in the California region, and two (141, 14s) in 

 the North Pacific middle latitudes. 



There are 6 pump and 1 1 net samples, of which 8 were 

 taken at the surface, 4 at 50 meters, and 5 at 100 meters. 

 Maximum frequency, 18 per cent at station 48; other records 

 above minimum (2 to 4 per cent) from stations 34, 54, 109, 

 141; average in Pacific net samples, 3.5 per cent; in pump 

 samples, 1.6 loricae. 



Temperature: Atlantic, net samples 24.98-36^06 (30. 54 ): 

 Pacific, net samples i6?75~23?72 (21^59), pump samples 

 20?79-28?38 (23:67). Salinity: Atlantic, net sample 36. =53; 

 Pacific, net samples 34.86-36.44 (35.48), pump samples 

 54.62-35.64 (35.10). Density: Atlantic, net sample 24. S2; 

 Pacific, net samples 23.74-25.37 (24.67), pump samples 

 22.77-24.64 (23.81). pH: Atlantic, net samples 8.15-8.21 

 (8.18); Pacific, net samples 8.16-8.27 (8.19), pump samples 

 8.21-8.30 (8.27). 



Eutintinnus fraknoii (Daday) Kofoid and Campbell 



(Figure 123) 



Tintinnus jra\noii, Kofoid and Campbell, 1929, p. $34, fig. 

 638; Hofker, [931, pp. 385-386, fig. Si. 



The tall, slender lorica, with flaring ends ,\nd tapering 

 shaft, has a length of 5.6 oral diameters. The oral margin is 

 thin, with a narrow, horizontal brim. The suboral funnel 

 flares (21 ) within the anterior 0.16 total length; its diameter 

 at the lower end is 0.6 oral diameter. The tapering (5 ) 

 shaft decreases evenly in diameter to within 0.2 oral diameter 

 above the aboral end, where its diameter reaches 0.44 oral 

 diameter. The flaring (40 ), open aboral end is brimless 

 and its diameter is 0.56 oral diameter. 



The thin (0.04 oral diameter), uniform wall is glassy. 

 Rare coccoliths are scattered along the shall. 



There are 4(8) macronuclei. 



Length, 27X11. 



Eutintinnus fraknoii is much shorter and less slender than 

 /•". birictus and E. elongatm. These two species also have 

 less suboral flare. Eutintinnus medius has median swelling 



