132 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



1.43 oral diameters, and their edges are not especially thick- 

 ened as stays, as in Dadayiella. The collar-like flaring region 

 is a basal segment of an inverted truncated cone (35°) with 

 a length of 0.71 oral diameter and a diameter, at the lower 

 end, of 0.7 oral diameter. The tapering (3°) shaft extends 

 below the collar for 0.6 total length, and then becomes more 

 convex conical (16°) lor the remaining part. There are 6 

 decurrent, bladelike fins of equal length on the aboral cone. 

 Around the open aboral end is a weakly developed aboral 

 cylinder. 



The wall is thin and hyaline. 



Length, 163 to 266^1. 



Caribbean and Panamic loricae differ a little in length, 

 the former averaging longer. The length of the faceted 

 region also differs in various loricae. 



Epirhabdosella ctineolata differs from the highly aberrant 

 and distantly related RhabdoscUa oclogenata in having more 

 facets (18 to 20) instead of but a few (8), and also in 

 having the facets limited to the suboral region; in octogenata 

 they extend the whole length of the lorica. Other differences 

 include the lack of fins in octogenata and the aboral twist in 

 its shaft. None of the species of SalpingcUa has suboral 

 facets. 



Recorded from seven stations, one in the Atlantic and six 

 in the Pacific, as follows: one (33) in the Caribbean Sea, one 

 (35-36) in the Pacific equatorial region, one (45) in the 

 Galapagos region, two (93, 95) in the region of South 

 Pacific island fields, and two (135, 136) in the California 

 region. 



There are 5 pump and 2 net samples, of which i was 

 taken at the surface, 2 at 50 meters, and 4 at too meters. 

 Frequency, 4 per cent at station 35-36; other records mini- 

 mum. 



Temperature: Atlantic, pump sample 28^25; Pacific, pump 

 samples i8?87-27?65 (20^91), net sample 28?74. Salinity: 

 Ariantic, pump sample 36.19; Pacific, pump samples 34.88- 

 35.83 (35.49), net sample 35.35. Density: Adantic, pump 

 sample 23.23; Pacific, pump samples 23.16-25.09 (24.37), "et 

 sample 22.43. pH: Atlantic, pump sample 8.24; Pacific, 

 pump samples 8.13-8.39 (8.28), net sample 8.22. 



SALPINGACANTHA Kofoid and Campbell 



Salpingacantha Kofoid and Campbell, 1929, p. 355. 



Salpingacantha probably arose from SalpingelLi, from 

 which it differs mainly in the oral teeth, always lacking in 

 Salpingella. 



Salpingacantha is commoner in the tropics than elsewhere, 

 although a few species do extend northward and southward 

 into cool waters. None is found in the Antarctic. 



Three species are described here. 



Salpingacantha crenulata Kofoid and Campbell 

 Salpingacantha crenulata Kofoid and Campbell, 1929, p. 357, 



fig- 694. 

 The bradlike lorica, with a length of 6.4 to 10.3 oral 

 diameters, has a crenulated brim and no aboral cylinder. 

 The oral margin has 7 to 12 low, subequidistant, subequal 



triangular points. The collar is a short, full cone (40°) with 

 a length of 0.6 oral diameter, and a diameter of 0.75 oral 

 diameter at its lower end. The shaft is an elongated cylinder 

 in the upper 0.65, and a narrow cone (18°) in the lower 

 section. There are 7 low, ridgelike fins, extending 0.4 total 

 length above the distal end. The open aboral end lacks a 

 cylinder. 



The wall is hyaline, and not over o.oi oral diameter in 

 thickness. 



Length, 145 to 197^1. 



Salpingacantha crenulata has a crinkled margin, but this 

 differs from the margin in S. perca, which has definite points 

 and suboral facets. It is much like S. subconica, but has 

 crenulations instead of a smooth margin. 



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

 in 2 net samples taken at 50 and 100 meters. Frequency, 

 minimum. 



Temperature, 2i?69-22?37 (22?03); salinity, 35.21-35.23 

 (35.22); density, 24.23-24.48 (24.35); pH, 8.12-8. 13 (8.125). 



Salpingacantha perca Kofoid and Campbell 



Salpingacantha perca Kofoid and Campbell, 1929, p. 357, fig. 

 C90. 



The small, short lorica, with a length of 7.0 oral diameters, 

 has an oral margin formed by 10 longitudinal folds. The 

 oral rim has a lo-sided cross section with a crinkled, thin 

 edge. There is a low, conical (32°) collar only 0.5 oral 

 diameter in length, and with a diameter of 0.7 oral diameter 

 at the lower end. The long shaft is a cone (3°) for 0.75 

 total length, and then, below, becomes a wider (20°) cone 

 for the remaining part of the length. There are 5 more or 

 less erect, narrow fins, which extend 0.3 total length above 

 the aboral end. There is a tiny aboral cylinder around the 

 open end. 



The wall is glassy and uniformly not over o.oi oral diam- 

 eter in thickness. At the junction of collar and shaft is a 

 low, conical closing apparatus. 



Length, 921.1. 



Salpingacantha perca has creases or folds around the oral 

 rim, unlike any of the other species, all of which have pretty 

 definite teeth, except, perhaps, S. simplex from the Antarctic, 

 which has an irregular but circular margin. Salpingacantha 

 crenulata, the nearest tropical species, has 7 fins, no folds, 

 and 7 to 12 teeth. 



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

 in 2 pump samples, i taken at the surface and i at 50 meters. 

 Average frequency, 1.5 per cent. 



Temperature, 22?37-22?43 (22?4o); salinity, 35.23-35.26 

 (35.24); density, 24.30-24.31 (24.305); pH, 8. 12-8. 13 

 (8.125). 



Salpingacantha undata (Jorgensen) Kofoid and Campbell 



Salpingacantha iimiata, Kofoid and Campbell, 1929, p. 35(S, fig. 

 695. 



The elongated, nail-shaped lorica, with clawlike oral 

 margin, has a length of 8.0 oral diameters. The oral rim is 

 folded inward between the 4 to 6 erect, triangular, equi- 



