Geology, ^c. of the Connecticut,. 81 



clenlly for rivers to have found their channels. On the 

 map it embraces the alluvial plain around New-Haven and 

 the salt marshes extending some distance on both sides of 

 the city. The plain of New-Haven is made up of coarse 

 sand with some gravel and an intermixture of broken shells 

 and sea weed. The marshes consist of sand, mud and 

 salt. 



The region about New-Haven, embraced by this alluvion, 

 is interesting to the botanist, as he here finds many plants 

 not growing in the interior. Among these, we may men- 

 tion Salsola kali, Salicomia herbacea, Triglochin mariti' 

 mum, Statice limonium, ha frutescens of Lin. and Ammi 

 capillaceum and Conyza camphorata of Muhl. Limnetis 

 polyslachia and juncea of Ph. L. glabra, Muhl. Holcns 

 odoratus, Mx. and Limosella subulata, Ives. Here also, 

 occur the other new species of Prof. Ives, Gnaphalium de- 

 currens and Asclepias lanceolata, along with PlantagO 

 maritima, lanceolata, and Virginica of Lin. Eriocaulon 

 pellucidum, Mx. Cassia chamaecrista and Uniola spicata 

 of Lin. &;c. &c. On the beach we find Fucus nodosus 

 and vesiculosus of Lin.* and adhering to the latter, 

 Mytilus striatulus? (Donov. in Rees.) Here also occur 

 Venus mercenaria, (common clam) Ostrea edulis ? (oyster) 

 and one or two species oi Area and Anomia, with others I 

 do not know. 



2. Gravel, This usually lies beneath all other alluvial 

 deposits along the Connecticut : though it sometimes al- 

 ternates with beds of sand. It is arranged in somewhat 

 regular strata. The pebbles rarely exceed two or three 

 inches in diameter. 



3. Clay. This is a coarse kind, such as is used for mak- 

 ing brick; and generally lies above the gravel and beneath 

 the sand and mud, or loam. It probably underlies those 

 extensive sandy plains that occur in Suffield and Windsor, 

 on the West, and in Springfield, Longmeadow, Enfield, 

 East Windsor, and East Hartford, on the east of the Con- 

 necticut. In some places the clay appears at the surface, 

 as in Hartford, Windsor, Deerfield, &£c. 



* On Long-Island, fitly miles east of New-Haven harbor. I found Sphae. 

 rococcus confervoides, Agardh, 



VoT. VI—No, 1. 11 



