OF THE MAKRAN SERIES. 381 



Illustrations of the Species in Plate LVIII. 

 Fig. 6. Abactinal view of the test : natural size. 



7. Actinal view of the test : natural size. 



8. Apical system : magnified. 



9. Ornamentation of the abactinal surface : magnified. 



10. Portion of the test in the region of the peristome : magnified. 



Family SCUTELLIDM 

 Genus ECHINODISCUS, Breynius {Leske emend.). 



We follow the description of this genus which is contained in the ' Revision ' by 

 A. Agassiz, p. 531. 



There is a large, but unfortunately incomplete, form in the collection which differs 

 very slightly from Echinodiscus auritus, Leske. The length is, however, slightly in 

 excess of the breadth, and the postero-lateral expansion is only slight. 



1. Echinodiscus aukitus, Leske, var. 



Locality. Kharak Island. Survey -number G ^f^. 



Family SPATANGIDyE. 



Subfamily SPATANOIN^. 



Many fragments of Echinoidea belonging to this subfamily occur ; but none are 

 sufficient to enable us to give a generic or a specific name to them. The only form 

 which" may be named with doubt is a very interesting one, for it has the character of a 

 young Breynia. It has six tubercles in a lateral interradium and the peculiar ambulacra 

 of the genus; but no fascicles exist, and the greater part of the apical system is 

 covered with a very adherent matrix. 



Locality. Henjam Island. Survey-number G^-f-^. 



IV. Remarks on the Species. 



The species of Cidaris from the Persian Gulf are very modern-looking, and one 

 which has Goniocidaridean alliances is very probably the same as Goniocidaris affinis, 

 nobis, from the Miocene of Kachh. There are some doubtful points about the species, 

 however, and we have not thought it advisable to give the specimen a name. It appears 

 to be an extinct form. The true Cidaris from the Makran beds is allied to the Miocene 

 species of Kachh and Kattywar, and somewhat to those of Gaj ; but the species has its 

 characteristics, and when a perfect specimen is found, doubtless the affinity will be 

 shown to be with the Tertiary rather than with the recent species. 



The numerous radioles indicate a number of Goniocidaris-\\\ie forms, and we 

 regret the meagre nature of the collection of tests. 



It is interesting to find parts of such a fragile urchin a& a Salmacis in the col- 



3g 



