THE FORAMINIFBRA OF LORD HOWE ISLAND. 611 
Comparatively infrequent as compared with 0. complanata. A few speci- 
mens exhibit a crumpled development oE the marginal rows of chambers, 
approaching the structure of OrhitoUtes complanata {Marginopora vertehralis) , 
var. plicata Dana (1846, in Wilkes's U.S. Exploring Exp. vol. vii. p. 706, 
pi. 60. fig. 0), which is better known under Brady's varietal name, var. 
laciniata, but there is no indication that these specimens represent a repro- 
ductive process as in Dana's variety. 
.56. Orbitolites complanata Lamarck. 
OrbitoUtes complanata Lamarck, 1802, Syst. Anim. sans Vert. p. .376. 
Brady, L884, FC. p. 218, pi. 16. figs. 1-6 ; pi. 17 
figs. 1-6. 
„ „ Heron-Allen & Earland, 1914-1.5, FKA. p. 606. 
Extremely common, but never reaching any great dimensions. No 
specimens of y-Av. plicata or viviparous individuals were observed. 
Grateritbs Heron-Allen Sf Earland. 
CratbriteSj gen. nov. 
This new genus is founded for the reception of a single specimen, which, 
while evidently closely connected with OrhitoUtes, cannot by any stretch of 
generic definition be included with hitherto recorded types. The closest 
search through the material available has not resulted in the discovery of 
other specimens or of anything which might be regarded as an eardier or 
more advanced condition of growth, and we feel compelled, against our usual 
practice, on such very insufficient data, to institute a new genus for what is 
unqestionahly a novel and interesting type of construction. Future research 
may render it necessary to amplify or amend our description, or may possibly 
releoate the specimen to the position of a freak or a pathological develop- 
ment of OrhitoUtes complanata. 
■57. Cratbrites rectus, sp. nov. (PI. 35. figs. 11, 12.) 
The type-specimen is free, but the base, which is roughly quadrigonal in 
form suo-o-ests that it was once sessile on some other object. The basal layer 
consists of a nubecularine mass of chambers without a trace of spiral disposition. 
Arising from this outspread basal layer is a thick trunk nearly circular in 
section, composed of five or six superimposed rings of chamberlets, orbito- 
line in appearance, but devoid of marginal pores. From this point the trunk 
rapidly increases to neaidy double its diameter at its narrowest point by the 
addition of further superimposed rings of orbitoline chambers without mar- 
o-inal pores. The greatest diameter of the test is reached at a point which is 
about twelve layers of chambers above the rim of the base. From this 
widest point the upper surface of the test is completed by a thin and highly 
convex cover, which bears no trace of septa tion, but is entirely covered with 
