diff -uNr GMT4.0/src/gmt.h GMT4.0_add_ellipsoid/src/gmt.h
--- GMT4.0/src/gmt.h	2004-09-15 11:16:36.000000000 +0900
+++ GMT4.0_add_ellipsoid/src/gmt.h	2005-03-13 08:23:48.000000000 +0900
@@ -222,7 +222,7 @@
 #define GMT_N_SYSTEMS 6		/* Number of time systems in gmt_time_systems.h */
 /* This structure contains default parameters for the GMT system */
 
-#define N_ELLIPSOIDS	63
+#define N_ELLIPSOIDS	64
 #define N_DATUMS	223
 
 #define GMT_PEN_LEN	128
diff -uNr GMT4.0/src/gmt_ellipsoids.h GMT4.0_add_ellipsoid/src/gmt_ellipsoids.h
--- GMT4.0/src/gmt_ellipsoids.h	2004-09-15 11:26:04.000000000 +0900
+++ GMT4.0_add_ellipsoid/src/gmt_ellipsoids.h	2005-03-13 08:43:04.000000000 +0900
@@ -60,4 +60,5 @@
 		{ "Delambre", 1810, 6376428.0, 0.0, 1.0/311.5},
 		{ "CPM", 1799, 6375738.7, 0.0, 1.0/334.29},
 		{ "Maupertius", 1738, 6397300.0, 0.0, 1.0/191.0},
-		{ "Sphere", 1980, 6371008.7714, 0.0, 0.0 }
+                { "Sphere", 1980, 6371008.7714, 0.0, 0.0 },
+                { "Hughes-1980", 1980, 6378273., 0.0, 1.0/298.2794 }