1866.] LEITTI ADAMS —HALTTHEETFM. 595 



inches, and of the middle of the shaft 2-5 inches. The lower extre- 

 mity of a humerus is 2*3 inches across the articulation ; the furrow 

 on the external border is faint, which, again, distinguishes the bones 

 in question from those of marine turtles. 



A cervical vertebra, possibly the 5th or 6th, has lost its anterior 

 half; but the convex end and vertebral foramen, together with the 

 articulating processes, are entire. The breadth of the convex arti- 

 culating surface of the body is 1 -4 inch, by 1 inch in thickness ; 

 entire height of the vertebra 2'2 inches. The caudal vertebra from 

 Benghisa Gap has also lost its posterior portion ; and transverse pro- 

 cesses of the body, with the concave articulation, canal, and anterior 

 superior articulating facets, are preserved. The concave articulation 

 is 0-9 inch broad by 0*7 in the antero -posterior direction ; the 

 height of the vertebra 1-7 inch, and diameter of the canal 0-3 

 inch. 



A humerus of a very small species of Tortoise from the debris of 

 Zebbug Cave shows only the head and a portion of the shaft, the 

 curved condition of the latter clearly distinguishing it from the 

 Marine, whilst the greater comparative width between the tuberosi- 

 ties separates it from the Land, and assimilates it to either the Marsh 

 or Eiver families. The fragment measures from the head to the 

 tuberosities 5*5 lines ; distance from one tuberosity to the other 5 

 lines. The head is 3*5 lines vertically, and 3 lines broad ; girth of 

 shaft 3 Hues. 



] 0. 0)1 the DiscovEKT of Eemains of Halitheeium in the Miocene 

 Deposits of Malta. By A. Leith Adams, M.B., F.G.S., Surgeon, 

 H.M. 22nd Regiment. 



Yariotjs forms of Cetacea have been met with in the four upper 

 beds of the Miocene strata of the Maltese group. The discovery there 

 of teeth of Zeuglodon by Scilla, and the abundant remains of one or 

 more species of Dugong allied to recent forms 

 Tooth of Hamerivm. ^^^j Balcence, show the prevalence of these 

 mammals in the seas of the period. They 

 are met with in the greatest numbers in the 

 sand-bed and nodule-bands of the Calca- 

 reous Sandstone. In the latter situation I 

 lately discovered a tooth which appeared to 

 me to belong to the Halitherium, and in the 

 sand-bed an ear-bone and caudal vertebrae 

 of possibly the same genus. The tooth and 

 ear-bone I have shown to Professor Owen, who has confirmed their 

 identity with the above-named genus. 



The molar, possibly a penultimate, has lost one of its fangs. 

 The crown is encased in thick shining enamel, and is 9 lines in 

 length by 8 lines in breadth; the height of the crown is 2-6 lines. 

 The fangs are two in number ; the anterior small, the posterior large 

 and diverging. The length of the latter is 7*5 lines. 



