102 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
fossil remains are few, but adjacent to it they abound and are well pre: 
served. Owing to the fact that the formation here lies comformably 
upon the Montpelier beds, and that they have strong lithologic resem- 
blance to it, it is difficult always to distinguish them. At Little Bay 
the fossils especially abound, and include numerous teeth of sharks. 
Thanks to Professor Duerden, of the Institute of Jamaica, we have 
Brown’s collections from these localities in Washington, and they 
correspond perfectly with those made west of Falmouth on the north 
coast. 
The marls and limestones of the Falmouth formation are consolidated 
sea mud, consisting of material exactly similar to the so called shell and 
coral sand which frequently makes the present sea border around 
Jamaica. It is entirely distinct from true reef rock, for it is not original 
reef material at all, although much of it may have been derived from 
reef débris. It is littoral organic oceanic débris which has been de- 
posited around the perimeter of the island, along borders free from land 
sediment or in lagoons between the reefs and the land. 
In age the Falmouth formation is newer than the older or highest 
elevated reefs, and probably synchronous with the middle and lower 
Soboruco ; hence it must be assigned, like them, to the Pleistocene of 
a later epoch. 
Miscellaneous Pleistocene and Recent Formations. — In addition to 
the old Kingston formation and kindred deposits in the interior valleys; 
there are many aggradational formations of more recent origin, around 
the margin of the island, occurring as alluvial streamway deposits dis- 
gorged along the coast, or gravel beds resulting from the undermining 
of the Richmond formation where it approaches the sea. The gravel 
of this material is mostly of the Blue Mountain Series, but it also 
contains pieces of various other formations. 
The Montego Formation. 
At numerous places around Jamaica are patches of swamp or moras? 
adjacent to the sea and almost level with it. These are usually com“ 
posed of alluvium brought down by the rivers, and are more recent than 
the Kingston formation previously described. They are well show? 
along the immediate coast at the mouth of Montego and Retirement | 
Rivers south of Montego Bay town and thence around the coast, pro 
ceeding eastward, as follows: near Montego Bay town and Umbrella | 
Point, St. James Parish ; Half-Moon Bay, Trelawney Parish ; Palmetto 
Point, district of St. George in Portland Parish; between Plantai? 
