OF WESTERN SIND. 225 



much smaller size, only 17 millim. in length, and may or may not belong to the same 

 species. From what can be observed of its shape, however, we are inclined to think 

 that it is probably the young of the same form as the larger test noticed above. 



Genus MOIEA, A. Agassiz, 1872. 



There is a fairly well-preserved fragment of a test unquestionably belonging to 

 this genus included in the collection of Echinoidea from the Khirthar series of strata 

 in Sind. From the appearance of the matrix, however, we have very strong doubts as 

 to the accuracy of the assignment of this fossil to the Nummulitic series, and would 

 urge caution before it is definitely included as a member of the Khirthar fauna. If, 

 however, the horizon accredited to the specimen under notice be correct, this fragment 

 is interesting as being the earliest representative of the genus with which we are 

 acquainted. 



A species of Moira (M. antiqua, nobis) occurs abundantly in the Miocene strata of 

 Kachh, and has recently been described by us in our work on the Tertiary Fossil 

 Echinoidea of that province. The present form is specifically^ distinct ; but we are 

 unfortunately unable to furnish a complete diagnosis, as little more than one side and 

 a portion of the abactinal surface of our specimen remains. Our description is neces- 

 sarily limited to the few striking characters preserved, and is in a large measure 

 comparative, having reference to the Miocene form. 



1. Moira peim^va, Duncan & Sladen. Plate XXXV, Figs. 1-3. 



Test rather small, marginal contour decidedly oviform ; the test being longer and 

 more contracted, and more definitely pointed posteriorly than in Jf. antiqua. Further- 

 more the test is not so widely expanded laterally behind the anterior petals, and is 

 more gradually contracted anteriorly. The dorsal height appears to be less, and the 

 ciirvature of the abactinal surface less bombous in its slope to the anterior margin, 

 which is comparatively sharp and angular. The odd anterior ambulacrum forms a 

 very deep pit in front of the apical disk ; and the upper margins of the groove are 

 comparatively wide apart, and appear to be less contracted as they approach the apex 

 than is the case in the Kachh form. 



The grooves of the lateral petals are very narrow and slit-like, and do not become 

 wider at their distal extremity. The posterior pair appear to be proportionately longer 

 in relation to the anterior pair than in M. antiqua. Both pairs of petals are also rather 

 more divergent, — the anterior pair of grooves subtending an angle of about 108°, and the 

 posterior one of about 50 . 



The characteristic lineal ornamentation of the genus is well preserved in our 

 specimen, and it is small and homogeneous. 



Dimensions. The length of the test is 24 millim., and the height about 17 millim. 



Locality. In the Khirthar series of strata (]) : Twenty-four miles west of Kotri 

 (entering the hills on the road to Bula Khan's Thana). Survey-number ^~. 



