OF KACHH AND KATTYWAR. 35 



uniform except on the slope of the groove for the anterior odd ambulacrum, where it 

 is larger and scantier. In the anterior interradia this ornamentation becomes 

 suddenly scanty and large, and increases in these characters beyond the fasciole to the 

 margin. Over the margin the tubercles become larger and scantier. On the other 

 hand, the ornamentation of the lateral and posterior ambulacra abactinally is the same 

 as that within the fasciole and thence to the margin. 



Length of the specimen (fractured) 53 miUim., breadth 51 millim. 



Locality. Nummulitic series of Kachh. Between Maniara-Fort hill and Karray. 

 Survey-number C 050. 



Illustrations of the Species in Plate VI. 



Fig. 3. Abactinal view : natural size. 



4. Distal end of antero-lateral petal and fasciole : magnified. 



5. Part of the anterior odd ambulacrum : magnified. 



2. Hemiastek, sp. Plate VI, Figs. 1, 2. 



The second specimen from the same locality had the apical system excentric in 

 front, a broad anterior ambulacrum, barely notching the ambitus, and long, slightly 

 curved, deeply grooved antero-lateral ambulacra. These form a wider angle than in the 

 species just noticed ; but the details are much the same, except that in this larger form 

 there are fewer pairs of pores. The ornamentation resembles that of the other species. 



The fasciole is distinct, and there is no trace of a lateral or subanal one, 

 although the position whence the first should start is preserved. 



Locality, The same as Hemiaster decipiens. 



Illustrations of the Species in Plate VI. 



Fig. 1. Abactinal view : natural size. 



2. Ornamentation, actinal : magnified. 



3. Hemiaster caeinatus, Duncan & Sladen. Plate XI, Figs. 1-4. 



The test is long, high, and rather narrow, slightly convex actinally, tumid at the 

 margin except posteriorly. It is boldly tumid in front, tail and truncated behind, with 

 a slightly re-entering curve there. The highest point is on a tall convex keel in the 

 posterior interradium, rather nearer the posterior termination than to the apical system. 

 The apical system is very slightly posterior. The peristome is excentric in front. The 

 periproct is ovoid and high up on the posterior truncation close below the termination 

 of the keel of the posterior interradium. 



The apical system is very small, immediately behind the very tall and narrow 

 keels of the anterior interradia, in front of the ascending keel of the posterior inter- 

 radium, and at the junction of the broad low keels of the lateral ambulacra. 



There are two large generative pores, which are separated by a rather long madre- 

 poric body, which extends posteriorly so as to separate the posterior ocular plates. 



f2 



