OF WESTERN SIND. 53 



Illustrations of the Specimen in Plate XII. 



Fig, 5. Side view : natural size. 

 6. The periproct : natural size. 



3. CoNOCLTPEUS DECLivis, sp. nov. Plate XII, Fig. 7. 



Another specimen, probably of a species of Conoclypeus, is much broken and covered 

 with brown limestone. It is oval, but is broadest in front and narrower, decidedly, behind; 

 the margin is sharp, and the test slopes up to the apex, which is slightly excentric and in 

 front not with a convex tumidity, but with here and there concave surfaces, becoming 

 convex close to the apex. The ambulacra are unequal, the posterior being the longest, 

 and they come down rather close to the margin ; they are widely open, and the interpori- 

 ferous zone is broader than a poriferous, nearly throughout. The poriferous zones are not 

 very wide, end in a point, and the ridges between the conjugate pores are multigranular. 

 The ornamentation of the interporiferous zone is of numerous sunken scrobicules, with 

 intermediate granulation, and the bosses are small and with small mamelons. The inter- 

 ambulacra differ in size on account of the comparative closeness of the anterior and the 

 antero-lateral ambulacra, and their shape gives a pinched-up appearance to the apical 

 part of the test. The actinal part is invisible. The ornamentation is larger and 

 scantier than in the forms already noticed. 



Locality. East of Lynyan, Eanikot group. Survey-number G yf ". 



Illustration of the Species in Plate XII. 

 Fig. 7. The test : natural size. 



Suborder ATELOSTOMATA. 

 Family CASSIDULIDjE. 



Suhfamily ECEINOLAMPIN^. 



Genus PHYLLOCLYPEUS. 



Phylloclypeus, de Loriol, 1881, MoTwgraphie des Echinides contenus dans les couches Nummulitiques de 

 VEgypU, p. 79. 



In true species of Conoclypeus the bourrelets around a more or less circular 

 peristome are very large and equal, and the phyllodes have neither intercalated plates 

 nor doubling of the ambulacral pores. In Phylloclypeus the bourrelets are not very 

 large, are unequal, and surround a more or less pentagonal peristome. The phyllodes 

 have intercalated plates and double pores, so that the floscelle is well developed. Some 

 species of Hchinolampas only differ from Phylloclypeus by having unequal poriferous 

 zones ; and it is advisable either to place Phylloclypeus as a subgenus of Echinolampas, 

 or as a genus of Echinolampinee as a subfamily. Certainly Phylloclypeus has no 

 jaws. 



I 



