508 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
ancl is provided with an incomplete ooecial cover and by the possession of pore- 
chambers (dietellae).” (Levinsen.) 
Genotype. — Rhynchozoon ( Lepralia ) bispinosa Johnston, 1849. Recent. 
Triphyllozoon rronl lii'orum N'acGill ivray 
var . typica Var. slrvuota var. munlta var. acutl 
ro stir is 
A "40 
Fig. 144. — Genus Triphyllozoon Canu and Bassler, 1917. 
A-D. Triphyllozoon m.oniUferum, MacGillivray, 1860. A. Zooecia of var. munita Hincks, 
1SS0; X 40. B. Ovicelled zooecium of var. munita Hincks, 1SS0, X 85, showing the trifoliate 
stigma ( tstg ) of the ovicell and the spiramen f sp ) of the peristomie. (A, B after Waters, 1894.) 
C. Zooecia showing articulated spines. D. Operculum of the principal varieties. (C, D after 
MacGillivray, 1885.) 
E-L. Opercula and mandibles. E. Triphyllozoon formosum MacGillivray. (After Mac- 
Gillivray. 1S85.) F. T. hirsutum Busk, 1884. (After Waters, 1909.) G. T. Mrsutwm Busk, 1S84. 
H. T. denticulatum Busk, 1884. I. T. tuhulatum Busk, 1S84. J. T. columniferum Busk, 1884. 
K. T. contortoplicatum Busk, 1S84. L. T. victoriensis Busk. 1SS4. (G-L after Busk, 1SS4.) 
Genus SCHIZOTHECA Hincks, 1877. 
1877. Schizotheca Hincks, On British Polyzoa, Pt. II, Classification, Annals Magazine 
Natural History, ser. 4, vol. 20, p. 528 ; 1SS0, British Marine Polyzoa, p. 283. 
“Zooecia with a suborbicnlar primary orifice, the lower margin sinnated; the 
secondary orifice raised, tubular, notched in front. Ovicell terminal, with a fissure 
in the front wall, never closed by the operculum.” 
Genotype. — Schizotheca ( Lepralia ) fissa Busk, 1858. Recent. 
Levinsen classified this genus in the Reteporidae, where we also believe it better 
placed. 
