124 BUIjLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Cassidulina laevigata — material examined. 



CASSIDULINA LAEVIGATA d'Orbigny, var. CARINATA, new variety. 



Plate 25, figs. 6, 7. 



Description. — Test differing from the typical in the thinner, more 

 compressed test, with a very distinct thin carina, forming the periph- 

 ery of the test. 



Distrihnfion. — Type-specimen (U.S.N.M. No. 16375a) from Ragged 

 Key, Florida, in 75 fathoms (137 meters). This variety has occurred 

 at several Albatross stations m the Gulf of Mexico, in the Caribbean 

 Sea, and also off the coast of Florida in less than 100 fathoms (183 

 meters). In this region it seems to replace the typical form of the 

 species. 



Cassidulina laevigata, var. carinata — material examined. 



Cat. 

 No. 



16370 

 16371 

 16372 

 16373 

 16374 

 16375 

 16376 



Coll. of— 



U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 



No. of 

 speci- 

 mens. 



Station. 



D2396... 

 D2399... 

 D2614... 

 D2639... 



Locality. 



28 34 00 N.: 86 48 00 W. 

 28 44 00 N.; 86 18 00 W. 

 34 09 00 N.; 76 02 OOW. 

 25 04 50 N.: 80 15 10 W. 



Off Key West, Fla 



Ragged Kev, Fla 



Ofi Fowey Rocks. Fla.. 



Depth 



iu 

 fath- 

 oms. 



335 

 196 

 168 

 56 



Bot- 

 tom 



tem- 

 pera- 

 ture. 



'F. 

 'hl.6 



Character of 

 bottom. 



gy-m 



gy-™:: 



gy. s. bk. sp. 



Abundance. 



Rare. 

 Rare. 

 Few. 

 Rare. 

 Few. 

 Few. 

 Bare. 



CASSIDULINA CRASSA d'Orbigny. 



Plate 26, fig. 7. 



Cassidulina crassa d'Orbigny, Foram. Amer. M^rid., 1839, p. 56, pi. 7, figs. 18-20; 

 For. Foss. Vienne, 1846, p. 213, pi. 21, figs. 42, 43.— Dawson, Ann. Mag. Nat. 

 Hist., vol. 5, 1870, p. 178; ser. 3, vol. 1, 1871, p. 198; ser. 4, vol. 7, 1871, list 

 p. 88. — Balkwill and Wright, Proc. Roy. Irish Acad., ser. 2, vol. 3, 1882, 

 p. 447.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 429, pi. 

 54, fig. 5 (not fig. 4).— Balkwill and Wright, Trans. Roy. Irish Acad., vol. 

 28, 1885, p. 335.— H. B. Brady, Journ. Roy. Micr. Soc, 1887, p. 901.— Pear- 

 CEY, Trans. Nat. Hist. Soc. Glasgow, vol. 2, 1890, p. 177.— Wright, Proc. 

 Roy. Irish Acad., vol. 1, ser. 3, 1891, p. 476.— Egger, Abh. Icon. bay. Akad. 

 Wiss. Miinchen, CI. II, vol. 18, 1893, p. 303, pi. 7, figs. 35, 36.— Goes, Kongl. 

 Svensk. Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 43, pi. 8, figs. 421, 422.— 

 Egger, Nat. Ver. Passau, Jahr. 16, 1895, p. 19, pi. 9, fig. 19.— Silvestri, 



