PLATE IV. 



Figure I. Orthniilnx gahh} Dall. Alum lihiff, Fla., station 2211. U.S. Nat. Mus. catalogue No. 328254 29 



2. Orthaiilax (igiiadUhnsisMauTy. Type. Aguadilla, Porto Rico. After Maury, 1920, pi. 9, fig. 4 30 



3. Orthaidac aijiiadiUensis Maury? Anguilla. After Cooke, 1919, pi. 2, fig. 3. U. S. Nat. Mus. catalogue 



No. l(if)982. 



4. Orthaiihi.v ai/iKidiJlnisis Maury. Hemispherical form. St. Croix. U. S. Nat. Mus. catalogue No. 



3282(;l. 



5. OrlhniiUix. agiiadilhiisix Maury. Conical form, X 2. Los (luiros, Dominican Repulilic. U. S. Nat. 



Mus. catalogue No. 328258. 



6. Orlhriiiliu- (iiiundilletisisMa.uiy. Palo Copado, Dominican Republic. U. S. Nat. .Mus. catalogue No. 



3282(>0. 



36 



