46 HENRY B, BRADY. 
M. Rupertiana, nov.—Test elongate, biconvex and Trilocu- 
line in the young condition, Quinqueloculine and 
depressed inthe adult; peripheral margin rounded, in 
very old specimens thin or carinate. Final segment 
terminating in an oval collar, either continuous and 
regular, or with a deep notch at each end (bilabiate), 
or with four equidistant notches forming a sort of 
cruciate aperture. Surface, striatopunctate, ¢.e. with 
minute pits or depressions in close, regular, parallel 
lines from one end of the test to the other. The test 
nevertheless is imperforate, for the pitted depressions 
penetrate only about half the thickness of the shell- 
wall. Length, ;; inch (1'9 mm.). 
M. Parkeri, nov.—This form is figured by Professor W. K. 
Parker in one of his earliest papers,! where it is simply 
characterised asa “ Quinqueloculina with oblique ridges,” 
but without distinctive name. The test is elongate and 
subtriangular ; the peripheral margins of the segments 
sharp, with a tendency to become carinate; their sur- 
faces traversed by somewhat oblique transverse ridges 
or crenulations. Length, ; inch (1* mm.). 
M. incrassata, nov.—A thick subglobular form of M. agglu- 
tinans, very coarsely arenaceous in texture. Segments 
embracing, with a tendency to become Biloculine (as 
in B. contrarta), septation obscure. Aperture crescen- 
tic, situate in a short delicate neck rising from the 
superior extremity of the final segment. Length, 
inch (0°76 mm.). 
Haverina, d’Orbigny. 
Hauerina borealis, nov.—Test planospiral, orbicular, com- 
pressed, biconvex; margin thick and rounded, very 
little hollowed at the sutures. Composed of several 
convolutions, the latter ones consisting of from three 
to five long narrow chambers. Aperture, simple crescenti- 
form, situate on the face of the terminal segment a little 
removed from the line of junction with the previous 
conyolution by a small erect lip. Diameter, ~> inch 
(1:3 mm.). 
This thick lenticular form of Hauerina appears to be 
limited in its distribution to the North Atlantic, and 
under the name of H. compressa it has been recorded 
1«QOn the Miliolitide (Agathistegues, d’Orbigny) of the East Indian 
Seas,” part 1, “ Miliola,” ‘Trans. Micros. Soc.,’ London, 1858, vol. vi, N.S., 
p. 53, pl. 5, fig. 10. 
