There are much fewer coral heads and reefs in the S.E. part. Thursday, March 13, 1924. Correia laid up with sore eyes. Ashore at 7:15 with three sailors. Prepared a large scale sketch of lagoon and on it sketched the cross reefs and relative abundance of coral heads, It took us until nearly noon to beat back and forth down lagoon to where we left off yesterday, dodging coral heads and reefs. Coral Heads and Reefs in Canton Lagoon (See larger Map.) The coral heads are thick around main entrance to lagoon, except on south side near Obs. spot. Out in the lagoon they seem to run in more or less parallel strings from N.N.W. to S.S.E., although there are numerous isolated heads. Between these are patches of deep, open water. The north-west end of the lagoon is blocked off by a nearly continuous line at right angles (that is E. by N. and W. by S.). Beyond toward the middle of the lagoon they definitely take the form of nearly continuous, parallel reefs, about 4 or 5 in number, beyond which the scattered heads become fewer and fewer, until the S.E. end of the lagoon is comparatively free. The heads themselves are usually flat on top or gently rounded, in many cases just awash. Some are topped by masses of forked, candlelabra-like brown sharp tipped coral, which rises out of the water. The prevailing colors of the coral are yellow-brown, red-brown, blue and purple. Roll 14:1 One of the N.-S. reefs, stretching away to the S.S.E., from the low spot where we were able to cross it. This is the second of four. The third reef runs from a point a little W. of the 1st patch of Tourne- fortia trees on the N. to about 2/3 the distance from the S.W. corner of the lagoon to the middle of the south side where it bends toward the S.E.. Ashore at a point about 1/8 mile S.E. of where I was picked up yesterday. Here there is an interesting coral formation on the lagoon beach as shown in Roll 14:2 Coral formation on lagoon beach and my three companions, Hono with the gun, Moto with the axe, and Mowra with the south-wester (on the left).