HOWE 



Fig. 1. — Archceolithothamnium affine, n. sp. Photograph of the free type specimen, from Car- 

 lisle marl pit. Antigua (T. W. Vaughan, Station No. 6873); slightly enlarged (V). 



Figs. 2 to 4. — Lithophyllum (?) molare, n. sp. (2) Photograph of all of material from north 

 side of Willoughby Bay, Antigua (T. W. Vaughan, b from Station No. 6881) ; slightly 

 enlarged ( - |). (3) Photograph of part of an obliquely transverse section of a large 

 branch, enlarged 44 diameters. (4) Photograph of part of a radio-longitudinal 

 section of same branch, showing perithallic cells, etc., enlarged 100 diameters. 



