IXSTtTUTE OF SCIENXE, I'H ILAnELPHIA. I7 



From a pliocene shell bed, on the Caloosahatchie River, Florida, Mr. 

 Willcox obtained some remains of a Horse consisting of two cervical vertebrae 

 and the fragments of a mandible with the first and second molar teeth. The 

 interior of the jaw fragment is filled with limestone, with shells o{ Planorbis, 

 etc. The remains in no respect differ from the corresponding parts of the 

 ordinary sized Domestic Horse, and probably pertain to\h& Eqinis fratcnuis. 



The remains of a Llama found with the former consist of a single speci- 

 men, a last inferior molar tooth, represented in figure 5, plate III. It is 

 like the corresponding tooth of the recent Aiichciiia llama of South America, 

 but is larger. It probably pertains to the smallest of three species which I 

 recently named Aiiclicnia minimits, minor and major, from a number of bones 

 found in association with those of a Rhinoceros and Mastodon, at Archer, 

 icyLu^tevy County, Florida. (Proc. Acad. Nat. Sc, p. 1 1, 1886.) 



Comparative measurements of the fossil are as follows ; 



Fossil Llama. Recent Llama. 



Fore and aft diameter of last lower molar, . 35 mm. 26 mm. 



Transverse diameter at fore part, . . . 13 " 12 " 



The remains of the Elephant of the rock crevice are two teeth. Of these, 

 one is a first milk molar and resembles in shape and size the corresponding 

 tooth of the Elephas priinigejnus,diS represented in Mr. Leith Adams' Mono- 

 graph on the British Fossil Elephants. The tooth has a long trihedral crown 

 with a pair of fore and aft divergent fangs. The rounded triturating surface 

 exhibits four transverse series of enameled tubercles enclosed in an abundance 

 of cementum. The tubercles in succession are one, two, two and three, and 

 the summits of most of them are just worn through so as to expose the 

 interior dentine. The specimen, represented in figures 6, 7, plate III., meas- 

 ures 18.5 millimetres fore and aft and 17 millimetres transversely. 



The other tooth, presented to Mr. Willcox by Mr. E. W. Agnew, of 

 Ocala, represented in figures 8, 9, is an upper left second or third milk 

 molar. It is nearly complete and is worn away at the anterior two-thirds, 

 exposing an oval, flat triturating surface crossed by seven enamel lobes. 

 The unworn, rounded back portion of the crown appears to contain four 

 additional lobes. The worn enamel lobes present ellipses with wide cemental 

 intervals, characteristic of the so-called coarse-plated variety of the Elephas 

 auiericanus, or the E. colnnibi. A single fang occupies the fore part of 

 the tooth, followed by a pair, one outer and the other inner, and behind these 

 is a quadrate column of connate fangs. 



The measurements of the tooth are as follows : 



Fore and aft diameter of the crown, . . . . . no mm. 



Greatest thickness, ........ 46 " 



Fore and aft diameter of the worn triturating surface, . . 84 " 



Greatest transverse breadth of triturating surface, . . 44 " 



