374 THE FOSSIL ECHINOIDEA 



One side of the spine is granulated and free from spinules, and the other has them and 

 also faint granulation. Figs. 1, 2, & 14. 



2. Tall compressed spines more or less wedge-shaped, with a considerable 

 expansion at the summit where the hollowing is considerable, and the crown of 

 spinules is large. Granules only on one side of the spine, and spinules on the other. 

 Figs. 3 to 9 and 12 & 13. 



3. Short narrow-based spines which expand suddenly, and have a wide and deep 

 hollow at the summit surrounded by long spinules. Granulation distinct on one side 

 of the spine. Figs. 10 & 11. 



In all these forms the articular fac6tte is smooth and small for the size of the 

 spines ; there is a slight ring to the cylindrical bouton, which is usually crenulated on 

 one side. The collerette is smooth and pronounced. 



Late researches by A. Agassiz have shown that there is a much greater diversity 

 of spines in the same species than was formerly acknowledged, and it is therefore not 

 safe to name forms from the characters of their spines only. Nevertheless, the 

 resemblance of the spines figured by us to some of those already noticed in describing 

 the Fossil Echinoidea of Kachh and Kattywar is unquestionable ; and they are found 

 in deposits with a Goniocidaris *- The similarity of some of the spines to those of 

 Gonincidaris drawn by A. Agassiz in the " Challenger Echinoidea" is very close f. 



Locality/. Henjam Island, Persian Gulf. Makran deposits. Survey-number 



Family TEMNOPLEURID^. 



Genus SALMACIS, Agassiz, 1841. 



1. Salmacis, sp. Plate LVI, Fig. 4. 



Fragments of a test of an undescribed species of Salmacis occur, which is 

 characterized by the presence of three vertical rows of tubercles on each part of the 

 interradia on either side of the median line, at and below the ambitus. There are' 

 small secondaries on the coronal plate close to the poriferous zones. There are two 

 rows of large tubercles within the ambulacra ; they are separated by low granules, and 

 there is a small secondary on the angle of each plate near the median line. The cuts 

 are small. 



The form is more closely allied to Salmacis Dussumieri, Agass., than to .Salmacis 

 bicolor, Agass. 



Locality. Makran coast deposits. Survey-number 1 



Illustration of the Specimen in Plate LVI. 

 Fig. 4. Part of the test : magnified. 

 * Pal. Ind. Ser. XIV. 1883, pi. viii, figs. 9-14. 

 t ' Report on the Echinoidea of the Challenger Expedition,' plate i. 



