HOVEY: ARTESIAN WELL AT KEY WEST. 81 



in all the samples where it is present at all. Originally was a loosely com- 

 pacted fine-grained sand-rock with some solid limestone in it. Not much is 

 recognizable. In the small determinable component were seen foraminifera 

 (Textularia, Orbitoides, Cristellaria, Orbitolites, etc.), a few spines of echini, some 

 remains of lamellibranchs (one is part of a comparatively large shell). It is 

 doubtful whether any gastropods are present. 



1,450 feet. — Color very light yellowish brown, with deep brown spots col- 

 ored by limonite. The quartz sand is present as a mere trace. The rock seems 

 to have been a very loosely compacted sand-rock, with a very few lumps and 

 no solid limestone in it. The grains are rounded, and there are some ovules 

 and bits of oolite in the material. Almost all the sample went through the 

 sieve, and is too fine to be determinable. In the small residue were noted some 

 foraminifera, an occasional bit of coral, and a few remains of lamellibranchs. 



1,475 feet. — The color has changed decidedly to a pure light gray. A few 

 angular particles of limpid quartz were noted. Scarcely one per cent failed to 

 pass the sieve, and very little of this residue is determinable. As usual, most 

 of the recognizable forms are foraminifera (sharply and obtusely pointed conical 

 Textularia, Cristellaria, Biloculina, etc.). There are also bits of madrepore 

 corals, millepores (?), branching bryozoans, and of lamellibranch shells and 

 casts. The sample seems to be a very fine sand, without lumps or chips of 

 solid rock. 



1,500 feet. — Color light brownish gray. Quartz sand, — a mere trace. 

 Sample is a very fine calcareous sand with a very few angular bits of rock 

 in it. The sand consists of rounded and subangular particles. No ovules or 

 oolite noted. Of the recognizable forms most were foraminifera, some of 

 which were large (Orbitoides, Textularia, etc.). Some bits of coral and a very 

 few spines of echini. Fragments of branching bryozoans were noted, and 

 a few remains of lamellibranchs. Nothing could be determined even gener- 

 ically except the foraminifera. 



1,525 feet. — Color light brownish gray, like the preceding. Quartz sand 

 likewise a trace, — visible under the microscope and left as residue by HC1. 

 Mostly a very fine sand, but in the coarser part are some relatively large pieces 

 of a porous sand-rock, consisting of rounded grains with an occasional fossil. 

 Organisms recognized : many foraminifera of several genera, the conical Textu- 

 laria being the most common ; a few bits of coral and branching bryozoans ; 

 lamellibranchs scarce and gastropods very scarce, but probably present. 



1,550 feet. — Color light brownish gray. Quartz sand, — a mere trace, as 

 usual. Appears to have been a porous limestone and sand-rock, none of which 

 was solidly compacted. Foraminifera are very numerous, Textularia pre- 

 dominating. A few bits are doubtfully referred to madrepore coral. Eemains 

 of echini, branching bryozoa, lamellibranchs, and gastropods were noted, the 

 last being very scarce. 



1,575 feet. — Color light brownish gray, like the last. The angular limpid 

 quartz sand is present as a mere trace. Seems to have been a moderately 

 coarse sand-rock with much fine material in it, the grains are rounded, and 



