15 8 MOLIvUSCA OF THK GULF OF MEXICO 128 



419, pL 36, f. 5, '89; Dall, Bull. 37, M. S. N. M., p. 164, 

 1889. 



Distribution. — Gulf of Mexico, West of Cedar Keys; the 

 Antilles and Brazil. 339-1019 fms. 



alta var.delicatulaDall, Bull. M. C. Z., 9, p. 48, '81, (as Segue?i- 

 zia)', 18, p. 384, pi. 22, f. 2, '89; Pilsbry, Man., 11, p. 421, 

 pi, 48. f. 3, 4, '89; Dall, Bull. 37, U. S. N. M., p. 164, pi. 

 22, f. 2, 2a, '89. 



Distribution. — Gulf of Mexico to Tobago, W. I. 805 fms. 



superba Watson, Jour. Linn. Soc. London, 14, p. 598, '79; Rept. 

 Chall. Gartr., p. loi, pi. 7, f. 10, '86; Pilsbry, Man., 11, p. 

 424, pi. 36, f. 6, 7, '89; Dall, Bull. 37, U. vS. N. M., p. 164, 

 1889. 



Distribution. — Cape York, Australia, type locality. Also 

 Gulf of Mexico west of Florida. 400-1400 fms. 



(Ancistrobasis) costulata Watson, Jour. Linn. Soc. London, 14, p. 

 600, '89; Rept. Chall. Gastr., p. 103, pi. 7, f. 11, '86; Dall. 

 Bull.,M. C. Z., 18, p. 384, pi. 23, f. 4, 4a, '89; Pilsbry, Man., 

 II, p. 426, pi. 36, f. 3, '89; Dall, Bull. 37, U. S.N. M., p. 

 164, pi. 23, f. 4, 4a, '89. 



Distribution. — Georgia to Culebra, W. I. 



costulata var. depressa Dall, Bull. M. C. Zool. Harv. Coll., i8, p- 



384, '89: Pilsbry, Man., 11 p. 428, pi. 6, f. 14, 15, '89; Dall, 

 Bull. U. S. N. M., p. 164, pi. 23. f. 4, 4a, '89. 



Distribution. — Yucatan Strait, 640 fms. Also Antillean. 



Genus UIVIBOf^SUIVl Link 



bairdi Dall, Bull. Mus. Comp. Zool., Harv. Coll., p. 359, pi. 21, 

 f. 6, 6a, '89; Pilsbry, Man., 11, p. 457, pi. 60, f. 5, 6, 

 1889. 



Distribution. — Yucatan Strait, 640 fms. Also Florida reefs, 

 200 fms. 



