322 THE FOSSIL ECHINOIDEA 



viii. Upper portion of scarp four miles west of Trak Hill. Survey-number G ^^. 

 ix. Naig-Nai valley, twelve miles south of Shah Rhiii. Survey-number G ^^- 

 X. Eavine on the south-east of Bill, twelve miles north of Shah-beg (about 30 feet 

 below the coral zone). Survey-number G -^^. 



xi. A few miles south of Pir Mangal (Mugger Peer). Survey-number G 



302 

 51 ■ 



xii. Entering the hills on the road from Jangri to Bula Khan's Thana. Survey- 

 number GYr- 



xiii. Eight miles sowth -of Jai^ri, east side of the Siirjana range. Survey-number 



fl 280 



xiv. Hills east of Thana Shah-beg (nearingPani gumbok from the west). Survey- 

 number G ^. 



XV. Six miles east-north-east of Karachi. Survey-number G ■^x^t- 



xvi. Amra Hill, Barri Nai, Shikapur district. Survey-number G ^^, 



xvii. Pir Gaji, west of Sehwan. Survey-number G -H'X- 



xviii. Tandra Eahim Khan, west of Sehwan. Survey-number G^^. 



xix. Nine miles north-west of the town of Karachi Survey-number G -^^ J, 



Illmstrations of the Species in Plate L. 



Fig. 1. Abactinal view of the test : natural size. 



2. Longitudinal profile of the same : natural size, 



3. An ambulacral petal : magnified. 



4. Ornamentation of the interradial plates on the abactinal surface : magnified, 



2. Cltpeasteb pulvinatus, Duncan & Sladen. Plate L, Figs. 5 & 6. 



Marginal contour elongately subpentagonal, with the angles tumid and rounded, 

 and the intervening areas more or less incurved. The length is proportional to the 

 breadth as 1 : 0"773, and the breadth opposite the extremities of the anterior pair 

 of petals is about equal to that opposite the extremities of the posterior pair. The 

 lateral sides are distinctly incurved, and also the posterior margin, but to a less degree. 

 The anterior margin has a rather arched or produced appearance, converging as it 

 proceeds forwards, and the incurving of the anterior interradia is scarcely perceptible. 

 The margins are very thick and tumid, especially in the radial regions. The abactinal 

 surface is subdepressed, but is slightly convex in the region of the petals, and the latter 

 have also a more or legs tumid tendency. In the interradia, at a little distance from 

 the margin, there is a slight .concavity which emphasizes the tumidity of the margin as 

 well as the convexity of the central area. Seen in longitudinal profile the anterior 

 slope is much less rapid than the posterior, and the anterior margin is also much thicker. 



The apical disk is subcentral. The ambulacral petaLs are long and broad 

 lanceolate, rather widely open at the outer extremity. The odd anterior petal and the 

 posterior pair are nearly equal in length, and the anterior pair are slightly shorter. 



t A very young example, nearly hidden in matrix, which may not belong to this species, 

 X A single specimen in bad condition and mor^ or less doubtful. 



