236 Geology, i^c. of the Connecticut. 



111. Red Ox-ide of Titanium. Near New-Haven — also at 

 Oxford in large genicniated crystals in mica slate — also at 

 Huntingtor, at the bismuth, mine ; — crystals as large as 

 the thumb find geniculated. (SilHman.) Also at Litchfield, 

 sometimes reticulated on mica slate. (Brace.) Also at 

 Worthington, Massachusetts, la quartz. (Brace.) Also 

 at Leydfu, in four or eight sides, often handsomely gonic- 

 ulated, generally striated, crystals: in limpid quartz, tremo- 

 lite and hornblende. Some of the specimens have several 

 geniculations and areas large as the thumb. Hundreds of 

 good specimens have been collected at this locality. Also 

 at Brattleborough, Colrain. Shelburiie, and Conway, in 

 quartz, mica slate and tremolite. At Shelburne I found its 

 crystals penetrating a vein of quartz in mica slate in place. 

 In Conway a few small crystals have been observed exhib- 

 iting the primitive form and presenting the " kind of twin 

 crystal," described in Rees Cyclopedia, Art. Rutile. This 

 mineral, indeed, may be found in almost any spot between 

 Conway and Brattleborough, on a strip several miles wide. 



112. Silico-Calcareous Oxide of Titanium. At Brattlebo- 

 rough, near the north line of the towii in a bowlder of gra- 

 nite, which has flesh coloured feldspar— colour dark brown, 

 or chesnut. Some of the crystals appear to be six sided 

 prisms. (Dewey.) These prisms are terminated, if I 

 mistake not by three sided pyramids. I also noticed a four 

 sided, flattened and striated prism, whose terminations 

 could not be determined. 



113. Ferruginous Oxide of Columhium, At Haddam, in 

 granite. (Berzelius and Torrey.) 



Remark. — Since the above list of localities was comple- 

 ted the following have occurred ; but as they cannot be 

 conveniently inserted in their proper places they may be 

 mentioned here. 



Fibrous Limestone, Satin Spar, in bituminous shale— 

 with Ichthyolites at Sunderland. Andalusite, at Litchfield, 

 Delafield. 



[To be concluded in the next Number.] 



