NO. 5 FORAMINIFERAL GENERA — LOEBLICH AND TAPPAN 37 



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 along the spiral suture. 8, Axial section of holotype (B.M.N.H. No. 

 ZF 2065), showing central filling of laminated calcite, with spiral 

 chamber in an open coil. From Challenger station 185, off Raine Island, 

 Torres Strait. X 109. 



Figs. 9, 10. Carterina spiculotesta (Carter) 27 



9a, Dorsal view of large hypotype (specimen of Carter in M.N.H.N.), 

 showing early Discorbis-\\k& coil and later irregularly arranged cres- 

 centic, low and broad chambers, all subdivided by radial partitions 

 visible only when specimen is dampened, and surrounded by a spreading 

 attached portion which is undivided, the entire test composed of fusiform 

 calcareous spicules. X 21. 9b, Central portion of same specimen, en- 

 larged to show early chamber development, arrangement of the cal- 

 careous spicules, and the gradual development of the radial partitions, 

 from 2 only partial secondary septa in the third whorl chambers to as 

 many as 15 complete subdivisions in the later elongate cresentic cham- 

 bers. From Bass Rock, Ceylon. X 79- loa. Dorsal view of hypotype 

 (U.S.N.M. No. P 2201), a young form, showing the typical appearance 

 before becoming attached in the later stage, with only five chambers 

 in the final whorl, and showing the appearance of a dry specimen with 

 the secondary partitions invisible dorsally. lob. Ventral view, showing 

 open umbilicus, radial sutures, and the slightly depressed secondary 

 septa, which can be determined surficially and are scarcely separable 

 ventrally from the five true septa. loc, Edge view, showing low spire 

 and rounded periphery. X 60. From Recent at Port Gaura, Philippines. 

 All figures are camera lucida drawings; figs. 1-9 by Helen Tappan 

 Loeblich; fig. 10 by Lawrence Isham. 



