34 BULLETIN" 71, UNITED STATES NATIONAL MUSEUM. 



Type-specimen. — Cat. No. 8537, U.S.N.M., from Nero station 1160 

 in 1,907 fathoms. It also occurred at Tuscarora station 2 in lat. 21° 

 07' N.; long. 158° 14' W. in 1,468 fathoms. 



LAGENA ALVEOLATA H. B. Brady, var. SUBSTRIATA H. B. Brady. 

 Plate 18, fig. 5. 



Lagena auriculata H. B. Brady, var. substriata H. B. Brady, Quart. Jburn. Micr. 



Sci., vol. 21, 1881, p. 61. 

 Lagena alveolata H. B. Brady, var. substriata H. B. Brady, Rep. Voy. Challenger, 



Zoology, vol. 9, 1884, p. 488, pi. 60, fig. 34. — Sidebottom, Journ. Quekett 



Micr. Soc, vol. 11, 1912, p. 424. 



Description. — Variety characterized by the body portion of the test 

 being striate or costate, especially about the base and somewhat less 

 so toward the apertural end. 



Length 0.60 mm. 



Distribution. — I have had specimens of this variety from Tuscarora 

 station 5, lat. 37° 04' N.; long. 123° 22' W., in 1,200 fathoms and 

 from four Nero stations between Guam and Yokohama as follows: 

 1299 in 1,817 fathoms, 1301 in 1,088 fathoms, 1320 in 2,048 fathoms, 

 and 1324 in 1,915 fathoms. 



The basal costse in this variety seem not to extend up beyond the 

 lower half of the test. 



LAGENA ALVEOLATA H. B. Brady, var. BASIEXCAVATA, new variety. 

 Plate 18, fig. 4. 



Description. — Variety characterized by two costse on each side in 

 the middle of the inferior half of the test, each forking near the periph- 

 ery and the two angles thus formed excavated. 



Length 0.75 mm. 



Distribution. — Type-specimen Cat. No. 8538, U.S.N.M., from Nero 

 station 1185 in 1,491 fathoms between Yokohama and Guam. 



The peculiar costse and basal excavations will distinguish this 

 variety. 



LAGENA ALVEOLATA H. B. Brady, var. PROLONG AT A, new variety. 

 Plate 18, fig. 3. 



Description. — Variety differing from the others by having a much 

 elongated neck instead of the typical bluntly pointed test. 



Length 0.65 mm. 



Distribution. — Type-specimen Cat. No. 8539, U.S.N.M., from Nero 

 station 1299 in 1,817 fathoms between Yokohama and Guam. 



All other forms which I have seen have the aperture without a 

 definite neck, but in this variety the test is gradually prolonged into 

 a long tapering neck. 



