NO. 5 FORAMINIFERAL GENERA — LOEBLICH AND TAPPAN 35 



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 partially evolute coil, and sutural pores which connect with the interior, 

 lb, Edge view, showing numerous irregular pores in a trematophore. 

 From Challenger station 187 A, off Booby Island. X 48. 2a, Equatorial 

 section of hypotype (U.S.N.M. P 2197b), showing early milioline cham- 

 bers and perforated trematophore. X 48. 2b, Enlarged central portion 

 of same equatorial section, showing trematophore distinct from the other 

 test walls. X 109. 3a, Axial section of hypotype (U.S.N.M. No. 

 P 2197a), showing early milioline chamber arrangement, with later 

 planispiral coiling. X 48. 3b, Enlarged central portion of same axial 

 section, showing extension of chamber wall over umbonal region, which 

 obscures the early coiling on the exterior. X 109. Sectioned specimens 

 from Torres Strait. 



Fig. 4. Rotaliammina inayori Cushman 20 



4a, Dorsal view of holotype (U.S.N.M. Cushman Coll. No. 511), 

 showing trochoid nature, and chambers completely in contact, and with 

 distinct, depressed sutures. 4b, Ventral view, showing central umbilicus 

 and the somewhat collapsed chambers of the final whorl. 4c, Edge view. 

 From near Pago Pago Harbor, Tutuila, Samoa. X 168. 



Figs. 5, 6. Tritaxis fnsca (Williamson) 19 



5a, Dorsal view of hypotype (U.S.N.M. No. P 2198a), showing cres- 

 centic later chambers, with early chambers nearly globular. 5b, Ventral 

 view, showing ovate aperture with distinct lip, above the base of the final 

 chamber, and near the center of the flattened ventral side. 5c, Edge 

 view, showing low conical spire. 6, Dorsal view of attached hypotype 

 (U.S.N.M. No. P 2198b), showing low conical form attached ventrally 

 and surrounded by an irregular spreading mass of agglutinated material. 

 Both from F. C. Helga Haul SR 331, off southwestern Ireland. X 36. 



Fig. 7. Tritaxis siphonijera (Cushman) 20 



View of holotype (U.S.N.M. Cushman Coll. No. 39619) of the type 

 species of Trochamminella, showing it to be congeneric with Tritaxis, 

 consisting of planoconvex test with crescentic chambers, surrounded by 

 agglutinated rim, extending at one side into tubular protrusion termi- 

 nating in a rounded aperture. X 33- From Johnson-Smithsonian Expe- 

 dition station 25, off Puerto Rico. 



Fig. 8. Rimulina glabra d'Orbigny 22 



8a, Side view of holotype (M.N.H.N.), showing elongate-ovate out- 

 line. 8b, Edge view, showing elongate slitlike aperture surrounded by a 

 lip, and absence of distinct septa. Recent of the Adriatic Sea. X 58. 



Figs. 9, 10. Bdelloidina aggregata Carter 21 



9a, Side view of attached and branching hypotype (U.S.N.M. No. 

 P 2199), from the Indian Ocean. 9b, Top view showing aperture con- 

 sisting of a row of pores against the attachment on the terminal cham- 

 ber. X 4- loa, Much-branched hypotype (U.S.N.M. No. P 2200), from 

 surface of a coral, Namu Island, Bikini Atoll. X 35- lob, Apertural 

 view of one branch, showing two rows of pores. X IS- 



Figs. II, 12. Tiibinella inornata (Brady) 18 



II, Small paratype (B.M.N.H.) viewed by transmitted light, and 

 showing the vestigial milioline stage consisting of proloculus and closely 

 appressed second chamber, reversing the direction of growth, and the 



