NO. 1 CUSHMAN, MCCULLOCH : ARENACEOUS FORAMINIFERA 89 



Test much compressed, elongate, early portion close coiled, plani- 

 spiral, consisting of two or three coils; later portion uncoiled, straight, 

 uniserial; chambers distinct, sutures usually well marked, but not de- 

 pressed; wall coarsely arenaceous but with a smooth surface; aperture 

 in the uncoiled portion of the adult simple, terminal, elongate; color 

 reddish or yellowish brown. 



Length up to 1.25 mm. 



Specimens referable to this species occur from numerous stations in 

 our material. They are never so well developed as in some parts of the 

 Atlantic but may be included under this name. The spiral suture in the 

 coiled portion is well marked and the earlier coils are visible. Specimens 

 occur at the following stations: 2054, 514, 318, 2061, 64, 321, 248, 

 2042, 2045, 245, 253, 280, 298, 2012, 2027, 215, 506, 2046, 2044, 

 2038, 2042, 52, 244, 255, 281, 294, 546, 325, 583, 2075. 



Distribution. — The present records indicate a depth range from 

 shore to 163 fms. ; a geographical range from Point Prieta, Mexico, in 

 the Gulf of California to Consag Rock, and on south to Gorgona 

 Island and Port Utria, Colombia. 



Ammobaculites ineptus Cushman and McCulloch, new species 



Plate 7, Fig. 6 



Test in the early portion coiled, later with the chambers very elon- 

 gate, each making up one entire side of the test; chambers distinct, very 

 slightly inflated in the upper part, greatly increasing in size and length 

 as added; sutures distinct, slightly depressed at the upper end; wall 

 finely arenaceous, smoothly finished, usually yellowish brown in color. 



Length 0.30-0.40 mm; breadth 0.12-0.15 mm; thickness 0.08-0.10 

 mm. 



Holotype (AHF no. 11) from locality 557. 



This species is a unique one diflFering from A. cassis (Parker) in the 

 greatly elongate later chambers enveloping the entire ventral side in the 

 adult and the very smooth wall. This in some respects resembles the 

 peculiar form figured by Millett [Journ. Roy. Micr. Soc, 1899, pi. 5, 

 fig. 6 (not 4, 5, 7)] from the Malay Archipelago. In our collection 

 the species occurs at localities 557 and 582. 



Distribution. — Type locality, Pifias Bay, Panama, in 12 fms. Addi- 

 tional material was collected off Puna, Ecuador, in 6 fms. 



