132 



A.B. SMITH ETAL. 



Fig. 41 Camera lucida drawings of plating in TLimhia sp. from the late 

 Thanetian of Casas de Oraien (Navarra); MGB 37436, a, oral surface; b, 

 apical surface. Scale bar = 5 mm. 



Fig. 42 Camera lucida drawings of plating in Sphenaster larumbensis sp. 

 nov., BMNH EE6073 (holotype), from the early Thanetian of Larumbe, 

 Navarra. a, apical surface; b, lateral profile (fasciole stippled); c, apical 

 disc; d, oral surface. Scale bars = 1 mm. 



oral suiface of the test is damaged, it is clear that the labral plate does 

 not extend over the mouth. The periproct is also circular and meas- 

 ures 2.0 mm in diameter. It is positioned high on the oblique posterior 

 of the test, 52% of test height from the base. 



A distinct peripetalous fasciole is positioned high on the test. It 

 passes immediately behind the apical system and crosses the anterior 

 margin at the ambitus. At its broadest point, the fasciole is 8 miliaries 

 wide. The fasciole becomes less distinct towards the anterior where 

 a number of small tubercles are incorporated. 



Tubercles are perforate and crenulate and are fairly densely dis- 

 tributed over the aboral surface of the test with scattered miliaries in 

 between. The largest tubercles are positioned on the anterior margin 



at the end of the frontal ambulacrum and on the posterior below the 

 periproct. Tubercles are most densely packed around the periproct. 

 Overall, the test has a somewhat granular appearance. On the oral 

 surface, tubercles are far sparser and on the whole larger than on the 

 upper surface. The largest tubercles are situated on the plastron. 



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