( t?\AA £§ 4* C4sr4* 
^ Q F 
tenuis Bornean.' 
Plat© * Pigs. 
$g r « Hobart T. Hill obtained at a locality 4 miles west of Laras, Penta 
Hie®, four excellent speaimena of an Orb ic alia, that satisfy in all par- 
ticulars Bun can 1 3 description of O* tenuis; however f . as they are in a 
better stats of preservation than Duncan 1 ® matarial ©ome additional de- 
tails can fee discovered, and an opportunity to study the variation of 
soma char actors is given. 
The o ora Hast is pulvinato, with the calicss confined to the upper 
surface and sides. 
Dimension s s 
Specimen 
Great ® r 
diameter 
Lesser 
diameter 
Height 
Bemarks 
Ho, 1 
69 mm. 
82 mm. 
85 mm. 
Specimen apparently 
somewhat crushed. 
Ho. 2 
87 
: 70 
58 
3 * 
100 
100 
Jjf 
Spmeinen sub - qua d ran gul a r 
in shape. 
4 
* Specimen 
figured 
126 
97 
64 
As regards the calicos, specimen Ho, 1 is sometrhat the most inter- 
esting, although those along the top appear to have been somewhat deformed 
through lateral compression of the eorallujsi. On the top, the sal ices 
have slightly elevated margins, ,75 am* is the maximum height , com© of 
Or-blcolla 
0 
