74 



BULLETIN 10-1, UNITED STATES NATIONAL MUSEUM. 



Description. — Tost troolioid, low spired, composed of about three 

 volutions, the last-formed one consisting of five or six chambers, 

 umbilicate, all chambers visible from above, only those of the last- 

 formed coil from below; chambers inflated, subo:lobose, sutures dis- 

 tinct and deep, nearly at right angles to the periphery; wall of fine 

 sand with an excess of cement, smooth and dully shining; aperture 

 smnll, a small arched slit where the chamber meets the previous volu- 

 tion on the ventral side and slightly in from the periphery, color 

 clear yellowish brown, the spire often darker than the outer whorl. 



Diameter up to 1 mm. 



Distrihuiion. — Nearlj'- all the records for this species arc in com- 

 paratively shallow water. Brady records it from one Challenger 

 station off Buenos Aires in 1 ,900 fathoms (3,475 meters), also as occur- 

 ring at intervals all about the British Isles, on the northeast shore of 

 the Bay of Biscay and the coast of Spain. It is recorded about the 

 British Isles by various writers, especially by Balkwill and Wright 

 and by Heron-Allen and Earland. The onl}^ Alhatross stations from 

 which I have seen it are one each from the Gulf of Mexico and the 

 eastern coast of the United States in comparatively deep water. 



Much more typical material however occurs in shallow water or 

 shore sands of southern New England. I have specimens from shore 

 sands from the following: Coffins Beach, Annisquam; Revere Beach; 

 Nahant Beach; and from the bathing beach at Buzzards Bay, all in 

 Massachusetts. These are clear honey yellow for the most part with 

 the center somewhat darker. It is probably common in shallow water 

 all along our coast. 



Trochamminn injlata — material examined. 



TROCHAMMINA INFLATA (Montagu), var. MACRESCENS H. B. Brady. 



Plate 15, fig. 1. 



Trochammina inflata (Montagu), var. macrescens H. B. Brady, in G. S. Biiadv, 

 Robertson, and H. B. Brady, Ann. Mag. Nat. Hist., ser. 4, vol. (5, 1870, 

 p. 290, pi. 11, fig. 5.— H. B. Brady, Journ. Roy. Micr. Soc, 1887, p. 892. - 

 Earland, Journ. Queckett Micr. Club, ser. 2, vol. 9, 1905, p. 203.— IIkron- 

 Allen and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 52; 

 Trans. Linn. Soc. London, vol. 11, pt. 13, 1916, p. 227. 



