14 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



in a net sample taken at 50 meters. Frequency, minimum. 

 Temperature, 25?3i; salinity, 37.15; density, 24.89; pH, 

 8.27. 



Codonaria benguelensis Kofoid and Campbell 

 Codonclla benguelensis Kofoid and Campbell, 1929, p. 57, fig. 



111. 



The stout, potlike lorica, with tall suboral cone and collar, 

 and plump bowl, has a length of 1.56 oral diameters. The 

 very thin, irregular oral margin has a cuff about 0.12 oral 

 diameter in length below it. The suboral cone (50 ) with 

 laterally concave sides has a length of nearly 0.15 oral diam- 

 eter, and a diameter of 1.1 oral diameters at its lower end. 

 The suboral ledge is separated from it by an angular (60°) 

 trough. The thick, slightly wavy, shelflike ledge has a 

 diameter of 1.22 oral diameters, and its thickness reaches 

 0.07 oral diameter. The collar is an inverted basal segment 

 of a truncated cone (17°) with a length of nearly 0.5 oral 

 diameter, and a diameter of a trifle more than 1.0 oral 

 diameter at its lower end. The suboral cone and the collar 

 together give the upper region of the lorica a decidedly con- 

 vex form. The rotund, rather squat bowl reaches its greatest 

 diameter of 1.17 oral diameters at 1.0 oral diameter below 

 the rim, below which level it gradually rounds off to the 

 blunt, subhemispherical aboral end. 



The wall is thickest in the collar and bowl, where it is less 

 than 0.06 oral diameter. A single layer of large, thick- 

 walled, rectangular secondary prisms is everywhere present 

 save in the internal ledge, where there are two layers. The 

 cuff is hyaline, the suboral cone and collar and the ledge 

 have moderately large, thick-walled hexagons, and the bowl 

 has very large "duplex" circular fenestrae in a wide equa- 

 torial band. The internal angular ledge at the junction of 

 collar and bowl reduces the aperture between them to 0.85 

 oral diameter. 



Length, 80 to 88u\. 



Codonaria angusta has a more convex suboral section less 

 sharply distinguishable into cone and collar, and also a 

 thinner, less evident ledge than does C. benguelensis. The 

 former, too, lacks duplex structure, and its bowl is not par- 

 ticularly similar. Codonaria oceanica has a wider bowl and 

 lower suboral region. 



Recorded from one station (100) in the North Pacific 

 trade region, in a net sample taken at 50 meters. Only 1 

 lorica was present. 



Temperature, 1-]%"]; salinity, 34.71; density, 22.31; pH, 

 8.22. 



Codonaria cistellula (Fol) Kofoid and Campbell 



Codonclla cistellula, Kofoid and Campbell, 1929, p. 57, fig. 125; 

 Hofker, 1931, pp. 354-356, fig. 29. 



The rather elongate, tall lorica, with flaring collar, mod- 

 estly inflated bowl, and pointed aboral end, has a length of 

 2.0 oral diameters. The minutely subdenticulate oral margin 

 is thin and there is a low cuff below the rim. The suboral 

 cone is a slightly concave basal segment of a cone (25 ) with 

 a length of only 0.11 oral diameter, and with a basal diam- 

 eter of 1.26 oral diameters. It is separated from the upper 



edge of the collar by a shallow, subangular trough. The 

 ledge is the smooth, free upper edge of the collar, the diam- 

 eter of which is 1.39 oral diameters. The collar is an in- 

 verted truncated basal segment of a plane to barely convex 

 cone (45°) with a length of 0.62 oral diameter and a 

 diameter at the neck of 1.0 oral diameter. The bowl rounds 

 off and reaches its greatest diameter at 0.65 total length 

 below the margin; this maximum is 1.57 oral diameters 

 (only a little less than the length of the whole lorica). The 

 wall quickly and convexly rounds to the sharp but not pro- 



iged aboral end, which 



oral diameter below the level 



of the maximum diameter. 



The wall is thickest in the lower collar and upper bowl, 

 where it reaches almost 0.09 oral diameter. It thins out in 

 the suboral cone and toward the aboral end to about 0.06. 

 There are one to four, mostly two to three, layers of sub- 

 hexagonal, thick-walled secondary prisms. The walls of 

 these prisms, under the best magnification, show primary 

 alveoles in one or two layers. The cuff is hyaline, but the 

 remainder of the surface has large, fairly heavy subrectangu- 

 lar to subhexagonal meshes. Large "simplex" fenestrae are 

 scattered over collar and bowl, mostly around the equator. 

 There is a conical closing apparatus of 12 truncated tri- 

 angular blades and a somatic enclosing sac. There are 12 or 

 more membranelles, and 16 macronuclei. 



Length, 90 to 125^. 



Codonaria cistellula is taller and longer than the other 

 species. Its bowl is less inflated, its aboral end less sharply 

 pointed, and its maximum inflation lower than in others. 

 It is not easily confused with them, the aboral characters in 

 general serving to distinguish it. Had it no suboral cone it 

 might be confused with Codonella diomedae, which, how- 

 ever, is a different form. 



Recorded from eight stations, three in the Atlantic and 

 five in the Pacific, as follows: two (17, 18) in the Sargasso 

 Sea, one (22) in the Atlantic equatorial region, two (69, 75) 

 in the Galapagos region, two (in, 145) in the North Pacific- 

 middle latitudes, and one (146) in the California region. 



There are 2 pump and 6 net samples, of which 1 was taken 

 at the surface, 3 at 50 meters, and 4 at 100 meters. Fre- 

 quency above minimum (2 to 3 per cent) at stations 18, 69, 

 145, 146. 



Temperature: Atlantic, net samples i7?50-2i?85 (i9?89); 

 Pacific, pump samples i9?39-2i?i3 (20?26), net samples 

 i8?40-20?07 (i9?2i). Salinity: Atlantic, net samples 36.60- 

 36.81 (36.70); Pacific, pump samples 34.58-35.24 (34.01). 

 net samples 34.32-35.47 (34.70). Density: Atlantic, net 

 samples 25.49-26.07 (25.78); Pacific, pump samples 24.62- 

 24.66 (24.64), net samples 24.24-25.55 (24.89). pH: Atlan- 

 tic, net samples 8.21-8.27 (8.24); Pacific, 1 pump sample 

 8.12, net samples 8.10-8.34 (8.23). 



Codonaria lata Kofoid and Campbell 



(Figure 12) 



Codondla lata Kofoid and Campbell, 1929, p. 62, fig. 126. 



The stout, small lorica, with flaring collar, rotund bowl, 

 and flattened aboral region, has a length of 1.47 oral diam- 



