26 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



The wall of the bowl reaches almost 0.09 oral diameter in 

 thickness at the equator; it thins out above and below. That 

 of the collar is uniformly less than 0.03 oral diameter. There 

 are two or three (usually three) layers of thin-walled hex- 

 agonal prisms in the bowl between very thin inner and outer 

 hyaline laminae. In the collar the laminae enclose much 

 finer, primary alveoles. A faint tracery of tertiary structure 

 of coarser mesh encloses the surface mesh of secondary 

 hexagons. 



Length, 98 to nou.. 



The lorica figured (fig. 7) has an uncommonly sharp 

 aboral end. 



Codonellopsis ecaudata is close to C. robusta, C. brasiliensis, 

 and C. turgescens. From them it differs mainly in the shape 

 of the aboral end, which is flat in robusta, conical-pointed in 

 brasiliensis, and pointed in turgescens. The bowl is also flat- 

 sided in robusta, and wider in turgescens than in ecaudata. 

 The collar of turgescens is swollen in the middle, whereas 

 that of ecaudata is cylindrical. All these four species of the 

 equatorial sea are trim, and distinctly different from others. 



Recorded from nine stations in the Pacific, as follows: 

 four (45, 46, 78, 80) in the Galapagos region, four (81, 82, 

 84, 85) in the region of South Pacific island fields, and one 

 (139) in the North Pacific trade region. Codonellopsis 

 ecaudata is, thus, fairly compactly distributed. 



There are 7 pump and 8 net samples, of which 2 were 

 taken at the surface, 10 at 50 meters, and 3 at 100 meters. 

 Maximum frequency, 6 per cent at station 78; other records 

 above minimum (2 to 5 per cent) from stations 46, 80, 81; 

 averages, 3.1 loricae and 2.1 per cent in pump and net 

 samples, respectively. 



Temperature: pump samples 22?78-26?42 (23:73), net 

 samples 22?37~27?89 (25?i5). Salinity: pump samples 

 35.18-36.17 (35.76), net samples 35.23-36.42 (35.79). Den- 

 sity: pump samples 23.56-25.11 (24.29), net samples 23.64- 

 24.33 ( 2 3-9 )- pH: pump samples 8.14-8.28 (8.18), net 

 samples 8.13-8.22 (8.17). 



Codonellopsis inflata Kofoid and Campbell 



Codonellopsis inflata Kofoid and Campbell, 1929, pp. 80-81, 

 fig. 176. 



The moderately tall and stout lorica, with collar somewhat 

 longer than bowl, with everted rim, rotund bowl, and 

 slender, fairly long aboral horn, has a length of 3.74 oral 

 diameters. The oral rim is thin-edged and entire. The 

 collar (0.42 total length in length) has distinct suboral flare 

 (40 ) within the uppermost one-tenth. It is cylindrical, 

 with a diameter of 0.83 oral diameter at the aboral end, and 

 has a clean, unmodified lateral contour. There are about 38 

 decidedly wavy spiral turns, of which the anterior 18 are 

 very narrow (uppermost 0.37 of the collar), and the posterior 

 20 are subuniformly wider, yet as wavy, save for the last 2 

 or 3. The neck of the bowl has a width of approximately 

 0.29 oral diameter, and a diameter at its lower end of 1.0 

 oral diameter; its sides are rounded concave. The bowl ex- 

 pands from the lower end of the neck to 1.32 oral diameters 

 at 0.58 total length from the rim. Below this widest level it 



rapidly contracts (90 ) to the aboral end, which has a diam- 

 eter of nearly 0.25 oral diameter. The aboral horn is almost 

 cylindrical, with a length of 1.0 oral diameter and with a 

 bluntly pointed free tip. 



The wall of the collar hardly reaches 0.02 oral diameter in 

 thickness, but that of the more or less uniform bowl has a 

 thickness of 0.08. The collar is hyaline and the bowl is 

 dense. There are thin laminae in both collar and bowl; in 

 the layer thus enclosed are two or three rows of rounded 

 alveoles. The surface of the bowl has tiny, rounded sec- 

 ondary areas, as does also the horn. The horn has a wide 

 cavity, quite cut off from that of the bowl by a depressed 

 diaphragm. 



Length, 130 to 22411.. 



The Carnegie loricae agree precisely with those of the 

 authors of the species. 



Codonellopsis inflata has a wider bowl than any other of 

 the species related to C. orthoceras. Of these, it is closest to 

 C. pacifica, from which it may be distinguished by the 

 cylindrical aboral horn and the many wavy spiral turns in 

 the collar. 



Recorded from one station (80) in the Galapagos region, 

 in a net sample taken at 50 meters. Frequency, 2 per cent. 



Temperature, 26?o6; salinity, 35.95; density, 23.75; pH, 

 8.19. 



Codonellopsis longa Kofoid and Campbell 

 (Figure 5) 

 Codonellopsis longa Kofoid and Campbell, 1929, p. 82, fig. 1S0. 

 Codonellopsis orthoceras. Hofker, 1931, pp. 367-369, figs. 47- 

 48A. 



The elongated lorica, with long collar, egg-shaped bowl, 

 and long aboral horn, has a length of 4.35 oral diameters. 

 The oral margin is flat. The collar has little flare (53°), 

 well within the upper one-tenth. The long collar (0.45 total 

 length in length) is virtually a cylinder with a diameter at 

 the base of over 0.85 oral diameter. It is made up of 20 

 subequal spiral turns with molded edges. The bowl has a 

 length of 1.6 oral diameters and reaches its maximum 

 diameter of 1.21 oral diameters near 0.63 total length below 

 the rim. The neck is swollen to 1.0 oral diameter just below 

 its junction with the collar and contracted to 0.85 oral 

 diameter at 0.49 total length below the rim. The aboral 

 diameter of the bowl is only 0.28 oral diameter. The aboral 

 horn is conical (12 ), 0.82 oral diameter in length, and 

 sharply pointed. 



The wall of the hyaline collar has a thickness of about 

 0.03 oral diameter, and that of the dense, brown bowl is 

 0.09 oral diameter. There are thin laminae which, in the 

 collar, enclose hyaline material; in the bowl there are two to 

 five layers of small hexagons, and larger tertiary structures 

 enclose the smaller hexagons in groups. The surface of the 

 bowl has small secondary hexagons enclosed by faint, larger 

 tertiary hexagonal meshwork. The cavity of the horn is 

 separated from that of the bowl by a thin diaphragm. 



Length, 235 to 294^1. 



Hofker's material may not all belong to Codonellopsis 

 longa; his figure 48A strongly suggests C. parva. 



