OF WESTEKN SIND. 213 



in the interambulacral areas, the greatest number being found on either side of the odd 

 anterior ambulacrum, where they are also comparatively smaller and more grouped 

 than elsewhere. In the lateral interradia there are a considerable number on the flank 

 of the groove of the posterolateral petal, where several transverse lines of two, three, 

 or even four tubercles are placed. Similar, but less numerous, tubercles occur on the 

 ether flank of the posterior petals and on each of the flanks of the anterior pair. There 

 are also a few large tubercles outside the fasciole in the lateral interradia, appearing 

 like a continuation of those on the posterior flank of the antero-lateral petal. Similarly 

 a few smaller tubercles are found outside the fasciole on either side of the median 

 suture of the odd posterior interradium. The subanal fasciole is very wide and sub- 

 reniform ; the length of the subanal plastron, or, in other words, its measurement along 

 the longitudinal axis of the test, not being more than one fourth of its width or trans- 

 verse measurement. Six or seven pairs of ambulacral pores are included on either side 

 of the area, and the tubercles which ornament the plastron are large, distinct, and 

 more or less definite in their arrangement. 



The general ornamentation of the test on the abactinal surface is small, uniform, 

 and crowded, becoming larger and more distinct at the margins, where it is also sub- 

 lineal in arrangement ; on the actinal surface it is much larger and more widely spaced, 

 but unfortunately very little detail remains on the latter region of the specimen under 

 notice. 



BemarJcs. This species is so well distinguished, either from M. Sowerhyi or M. scu- 

 tiformis, by the general depression of the test, by the difi'erent marginal contour, 

 ambulacral petals, fascioles, and ornamentation, that it appears superfluous to compare 

 these points seriatim. 



Dimensions. Length of the test 41-5 millim., breadth 38 millim., height 17-5 

 millim. 



Locality. In the Khirthar series of strata : East of Band Vero, north-west of 

 Kotri. Survey-number ^||5. 



Illustrations of the Species in Plate XXXVI. 



Fig. 8. Abactinal view of the test : natural size. 



9. Longitudinal profile of the test : natural size. 

 10. A portion of the abactinal surface, to show the apical disk, the 

 ambulacral petals, and the fasciole : magnified. 



5. Metalia aqakiciformis, Bwncan 8/" Sladen. Plate XXXVI, Figs. 11-14. 



The collection contains several specimens of Metalia, aril unfortunately much 

 weathered and broken, but which we do not hesitate to place as a distinct species, 

 although, unfortunately, we are only able to give a very imperfect description. The 

 following are the characters which are noticeable. 



The marginal contour of the test is subrotund, scarcely indented in front and faintly 

 truncate behind. The length and the breadth are subequal. The test is subdepressed, 

 and the greatest height, which is slightly excentric behind, is about equal to half the 



2f 



