TAXONOMY AND DISTRIBUTION 



39 



of 3.62 oral diameters. The oral margin is thin-edged, en- 

 tire, and rolled over. The upper end of the bowl flares as a 

 cone (60°) and includes the uppermost of the spiral turns. 

 Its sides are outwardly concave. The greater part of the 

 remaining portion of the bowl is also conical (10°), except 

 the aboral fifth, which contracts (16°) somewhat more. 

 The aboral end is not prolonged or especially modified as a 

 horn, save as it twists a bit. 



The wall is made up of 10 left-wound spiral turns. The 

 uppermost 5 are 0.25, 0.44, 0.53, 0.44, and 0.37 oral diam- 

 eter, respectively, in width. The aboral 5 are more or less 

 subuniformly about 0.44 oral diameter. Optically dark lines 

 separate the turns, and they rest one against another without 

 overlap. The wall is relatively thick, being 0.09 oral diam- 

 eter in the thickest turn. There are thin laminae which 

 enclo,se three to seven layers of rather tiny ovoid alveoles. 

 The wall is almost transparent. The cavity follows the outer 

 contour to the very tip; sometimes the aboral end is minutely 

 open. 



Length, 312(1. 



A peculiarly shaped, perhaps abnormal lorica is figured 

 (fig. 30) in addition to the more usual type (fig. 34). This 

 much shorter lorica has 19 almost horizontal turns, and a 

 wavy, eccentric aboral third. It may be a young individual 

 which for some reason did not finish out its lorica, or may 

 be a representative of a rarer species not yet reported. 



CoxluUa jasciata is easily differentiated from the other 

 species of the genus because of its elongated conical form 

 with few turns. Its aboral end is pointed, unlike that of 

 C. minor, which species is not tropical as is jasciata. Its con- 

 tour and aboral end differ from those of C. helix; it is not 

 so stout as C. decipwns, and lacks the solid horn which that 

 species has. 



Recorded from six stations, five in the Atlantic and one 

 in the Pacific, as follows: one (14) in the Gulf Stream, one 

 (20) in the Sargasso Sea, two (23, 24) in the Atlantic equa- 

 torial region, one (34) in the Caribbean Sea, and one (139) 

 in the North Pacific trade region. 



There are i pump and 5 net samples, of which i was 

 taken at the surface, 2 at 50 meters, and 3 at 100 meters. 

 The pump sample was taken in the Pacific and the net 

 samples in the Atlantic. Frequency, 4 per cent at station 14; 

 other records all minimum; average, 2 per cent. 



Temperature: pump sample 26?72, net samples i4?02- 

 24?98 (i9?62). Salinity: pump sample 34.82, net samples 

 35-59~36-73 (36.10). Density: pump sample 22.69, ^^^ 

 samples 24.52-26.66 (25.45). pH: pump sample 8.34, net 

 samples 7.96-8.21 (8. 11). 



Coxliella helix (Claparede and Lachmann) Brandt emended 

 Kofoid and Campbell 



CoxlicUii helix, Kofoid and Campbell, 1929, pp. 99-100. fig. 

 204. 



The tall, tubular, vaselike lorica, with toothed oral margin, 

 regular contour, and short, conical aboral horn, has a length 

 of 3.72 oral diameters. The oral margin is regularly serrate, 

 with about 36 short, evenly spaced, triangular, outspread 



teeth. The long bowl contracts below the margin as a basal 

 segment of an inverted concave cone (45°) with a width of 

 about o.i total length. The tubelike part of the bowl oc- 

 cupies somewhat less than 0.6 total length; it is without local 

 bulges or contractions. The posterior part is inverted, de- 

 cidedly convex conical (22° in the upper two-thirds and 66° 

 in the lower third). The conical (22°) aboral horn has a 

 length of only 0.5 oral diameter. 



The spiral lamina which forms the wall has 18 left-turning 

 spirals. These bands are widest across the mid-region of the 

 bowl and subuniformly narrower in the upper and lower 

 parts. At their widest they reach nearly 0.3 oral diameter. 

 They tend to rest one on another in such fashion that the 

 lateral contour presents a saw-toothed edge. An optically 

 dark line marks their boundaries. The wall is subuniformly 

 0.02 oral diameter in thickness except near the suboral flare, 

 where it gradually thins to the serrate margin. The wall has 

 distinct, large, hexagonal secondary structures with enclosed 

 minute alveoles. Toward the aboral end, adherent irregular 

 blobs occur. The aboral horn is hollow and the lumen 

 agrees with the outer contour exactly. 



Length, 196(1. 



The Carnegie lorica is in so many ways different from 

 that figured by Kofoid and Campbell that it might, with 

 some justification, have been assigned to a new species. The 

 regularity of facies, presence of teeth, length of bowl, and 

 shortness of horn are all characters of note. Yet the two 

 loricae seem to be essentially similar and to have definable 

 characters in common. 



Coxliella helix bears little resemblance to most of the 

 species, being taller and more slender. It is somewhat like 

 C. jasciata, but has a tubular bowl and definite contracted 

 aboral horn, as well as suboral flare, and a toothed margin. 

 Coxliella minor is also elongated, but its aboral horn is bul- 

 bous. Coxliella decipiens is relatively wider, and of alto- 

 gether different appearance. Coxliella helix is not likely to 

 be confused with others. 



Recorded from three stations in the Atlantic, as follows: 

 two (19, 20) in the Sargasso Sea and one (23) in the Atlantic 

 equatorial region. 



There are 3 net samples, of which 2 were taken at 50 

 meters and i at loo meters. Frequency, 3 per cent at station 

 19. 



Temperature, 20?99-25?3i (22?95); salinity, 36.04-37.15 

 (36.64); density, 24.89-25.38 (25.28); pH, 8.14-8.27 (8.20). 



Coxliella laciniosa (Brandt) Brandt emended Kofoid 

 and Campbell 



(Figures 29, 31, 32, 33) 



Coxliella laciniosa, Kofoid and Campbell, 1929, p. 100, fig. 193; 

 Marshall, 1934, p. 642. 



The generally short, stout, conical lorica, with entire rim 

 and short, twisted, conical aboral horn, has a length of 1.21 

 oral diameters. The oral margin is thin-edged, erect, and 

 smooth. The stout, generally conical bowl is subcylindrical 

 in the anterior 0.59, and convex conical aborally (at first 

 32", and 105° nearer the horn). The sides are full and the 



