112 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



Canthariella truncata Kofoid and Campbell 



CantharicUa truncata Kofoid and Campbell, 1929, p. 307, fig. 

 583- 



The slender little lorica, with short collar, narrow bowl, 

 and squarely truncated aboral end, has a length of 1.75 to 

 1.92 oral diameters. The thin oral margin is entire. The 

 collar is an inverted truncated cone (38°) with a length of 

 0.36 total length, and a diameter at the throat of 0.6 oral 

 diameter. The cylindrical bowl has a slight median bulge, 

 and the aboral end is squarely flattened, the diameter being 

 0.45 oral diameter. 



The thin, subuniform wall is hyaline, and the cavity 

 neatly conforms to the outer contour. 



Length, 42 to 541,1. 



Canthariella truncata differs from all others of the genus 

 in the squarely truncated aboral end. 



Recorded from one station (65) in the South Pacific 

 middle latitudes, in a net sample taken at 100 meters. Only 

 I lorica was found. 



Temperature, I5°03; salinity, 34.30; density, 25.44; pH, 

 8.10. 



AMPHORELLA Daday emended 



Amphorella, Kofoid and Campbell, 1929, pp. 307-308. 



Amphorella is an old genus of relatively simple character 

 but of larger size than Canthariella, with fins, and with a 

 peculiar aboral end. The genus is widely distributed in 

 warm and cool seas, although never arctic. 



Three species are described here. 



Amphorella amphora (Claparede and Lachmann) Kofoid 

 and Campbell 



Amphorella amphora, Kofoid and Campbell, 1929, p. 309, fig. 



586. 

 Amphorella brandti Kofoid and Campbell, 1929, p. 309, fig. 



588; Marshall, 1934, p. 655, fig. 36. 



The elongated, vaselike lorica has a length of 3.73 oral 

 diameters. The oral margin is thin and smooth. The collar 

 is widely flaring and funnel-shaped, sometimes reaching to 

 93°, and has a length of 0.23 oral diameter. Its sides are 

 plane. The bowl is generally cylindrical and is 0.6 oral 

 diameter in diameter just below the collar. The aboral 

 region is convex conical (33°). The aboral end is concavely 

 flattened and is less than 0.3 oral diameter in diameter. There 

 are 3 flat, bladelike fins which reach 0.5 total length in length. 



The wall is subuniformly thin, being 0.05 oral diameter 

 in thickness. The lorica has a greenish cast and is almost 

 transparent. Primary and secondary prismatic structure is 

 recorded. The cavity of the lorica adheres to the outer con- 

 tour. 



Length, 145 to i^oyi. 



Marshall (1934) had loricae of 107 to igoj-i from off the 

 Barrier Reef of Australia. The.se loricae had long fins and 

 Amphorella thickening, and otherwi.se conformed to the type 

 of amphora. 



Amphorella amphora is a species which is difficult to place. 

 It resembles, and is commonly confused with, A. quadri- 



lineata. It differs, however, in the length of the fins, which 

 are typically longer in qtiadrilineata. The collar is quite 

 different in shape in the two species, having, for one thing, a 

 distinct constriction in quadrilineata, whereas in amphora it 

 is more definitely a funnel. Amphorella amphora is some- 

 what like A. minor, but is larger and less stout. Amphorella 

 laac/{manni is smaller and unlike it in form, as are also the 

 peculiar A. calida and A. injundibulum from the Atlantic 

 collections of the National. 



The confused history of this species is recorded by Kofoid 

 and Campbell (1929). These authors, however, created the 

 species brandti, which is here treated as part of amphora. 

 The reasons for this inclusion are these: (i) Claparede and 

 Lachmann's original figure is generalized; (2) this figure 

 agrees better with amphora of Brandt (1906, p. 6g, fig. 6) 

 than with quadrilineata; and (3) loricae from ofl Japan, 

 which the writer has examined, as well as those of this col- 

 lection, can be readily differentiated from quadrilineata. The 

 elimination of brandti thus better clears up the history of 

 this division of the genus. 



Recorded from one station (45) in the Galapagos region, 

 in a pump sample taken at the surtace. Frequency, 2 per 

 cent. 



Temperature, 22^43; salinity, 35.26; density, 24.31; pH. 

 8.12. 



Amphorella minor Jorgensen 



(Figures 112, 115) 



Amphorella minor, Kofoid and Campbell, 1929, p. 310, fig. 



590; Marshall, 1934, p. 655, fig. 37. 

 Amphorella quadrilineata, Alzamora, 1929, p. 6, fig. 11. 



The tiny, short, thick lorica, with low, flaring collar, wide, 

 convex bowl, and narrowed aboral end with truncated tip, 

 has a length of 1.92 to 1.95 oral diameters. The oral margin 

 is thin and smooth. The collar is a low, widely flaring basal 

 segment of an inverted truncated cone (74° to 89°) with a 

 length of 0.23 to 0.25 oral diameter. Its sides are plane to 

 slightly convex, and evenly contoured. The throat has a 

 diameter of about 0.73 oral diameter. The convex bowl in- 

 creases in diameter to the level of greatest diameter, which 

 is 0.75 to 0.85 oral diameter, and is at 0.85 to 0.90 oral diam 

 eter below the rim. This section forms a segment of a 

 truncated cone (9°), and its sides are full. The aboral part 

 of the bowl occupies about i.i oral diameters, and contracts 

 from about 8° in the upper half to 55° in the lower half. 

 The sides of the upper section are nearly plane; those of the 

 lower are distinctly convex. The aboral end is concavely 

 truncate, and has a diameter of 0.16 oral diameter. The 

 fins are low, more or less suberect in their lower three- 

 fourths, and curved in the upper part. They have a length 

 ranging from 1.6 oral diameters up to the full length of the 

 bowl. 



The wall is thickest in the neck, where the Amphorella- 

 like thickening occurs. It is 0.08 oral diameter at this level. 

 It thins out steadily to the rim, and quickly below in the 

 bowl, where, at the aboral end, it is litde more than a mem- 

 brane. Thin laminae with homogeneous interlaminar matter 

 occur. The wall is glass-clear and without trace of even the 



