or WESTEEN SIND. 177 



the presence of this form ; and a drawing of the solitary example has been given in 

 Plate XXXVI. for future reference, and to facilitate identification when a further supply 

 of material may enable a complete diagnosis to be furnished. 



Locality. In the Khirthar series of strata: — Bolari bridge on the Baran rivers, 

 south-west of Kotri. Survey-number — gg-. 



Elustrations of the Species in Plate XXXVI. 

 Fig. 22. Abactinal view of the test : natural size. 



23. Longitudinal profile of the test: natural size. 



Subfamily EOEINANTEIN^. 



Gems ECHINANTHUS, Breynius, 1732. 



(See antea, p. 12, Part i.) 



1. EcHiNAWTHUs iNTERMEDius, Buncan & Sladen. Plate XXXII, Figs. 4-8. 



Test of medium size. Marginal contour elongately oval, well-rounded in front, 

 more contracted and produced behind, where the test is subrostrate and truncate. The 

 greatest breadth is behind the centre of the test, and equals about four fifths of the 

 length. The dorsal surface is depressed and slightly convex ; the greatest height, which 

 lies between the extremities of the posterior petals, is but very little more than two 

 fifths of the length. Seen in longitudinal profile, the anterior slope is a low gradual 

 declivity passing abruptly with a well-rounded curve over the tumid anterior margin ; 

 and the posterior slope is much shorter and more rapid, terminating abruptly at the 

 posterior truncation. The transverse profile shows the dorsal area slightly subconoid, 

 with the margins thick, tumid, and well-rounded. The actinal surface is tumid 

 laterally, with a well-defined depression corresponding with the longitudinal axis of the 

 test in front of the peristome, and behind dividing into two diverging depressions which 

 bound the more or less tumid median region of the odd posterior interradium, and 

 correspond with the course of the posterior ambulacra. 



The apical disk is excentric in front, its distance from the anterior margin being 

 rather more than one third of the length of the test, or measuring 11 millim. in an 

 example 30 millim. long. 



The ambulacra are conspicuously petaloid in outline, lancet-shaped and almost 

 closed at the outer extremity, simulating in a remarkable manner the ambulacral 

 rosette of Ilarionia Sindensis. The posterior petals are longer than the three anterior 

 petals, which are equal in length, but the odd anterior ambulacrum is the narrowest, 

 and is more widely open at the extremity and much less petaloid than the others. 

 The poriferous zones are equal and narrow, and the pores are subequal, the inner series 

 round, and the outer series with a tendency to become oval ; the pores of a pair are 

 united by a faint conjugating furrow, and adjacent pairs separated by low ill-defined 

 costEe, which probably bore three or four rather large isolated granules. The inter- 



