rp he collection of Echinoids made by Dr. E. Mjoberg at N. W. Australia (at 

 X Cape Jaubert and — a single specimen — at Broome) is only a small oiie, and 

 partly in jjoor condition. Nevertheless, it is of considerable interest. While, through 

 the works of Doderlein and H. L. Clark, the Echinoid fauna of the S. W. Austra- 

 lian coast bas been made fairly well known, the Northwestern coast of Australia 

 was till now almost a terra incognita as regards its Echinoid fauna. 



The information obtained through this collection is, accordingly, of considerable 

 value from a zoogeographical point of view. The more regrettable it is then, that 

 there was not made an extensive collection of the Echinoids there. The absence of 

 any Diadematid, Heliocidaris, Echinometra or Amblypneustes in the collection would 

 seem of the greatest zoogeographical interest. But judging from the whole character 

 of the collection it would be very unwise to base any conclusion upon the absence of 

 such forms. Doubtless some of them, at least, will be found there by a more thorough 

 survey of the fauna. Also quite a number of new forms must be expected from 

 this region. Since there is no less than four new species and one new variety among 

 the total number of fourteen species in the present collection, it may be safely con- 

 cluded that there is still a rich harvest of new forms, especially of small Clypeastrids, 

 Temnopleurids a. o. to be made at the Northwest Australian coast. 



The species represented in Dr. Mjoberg's collection are the following: 



1. Phyllacanthus longispinus n. sp. 



2. Prionocidaris bispinosa (Labik.). 

 var. elegans n. var. 



3. Ooniocidaris lubaria (Lamk.). 



4. Salmacis sphceroides (Linn.). 



5. Temnopleurus scalaris n. sp. 



6. Temnoirema elegans n. sp. 



7. Nudechinus darnUyensis (T. Woods). 



8. Helerocenfrotus mamiUatus (Klein). 



9. Peronella Lesueuri (Val.). 



10. orbicularis (Leske). 



11. » tuberculaln n. sp. 



12. Echinodiscus aurilus Leske. 



13. Fibidnria volva Ag. & Desor. 



14. Breynia ausiralasiae (liEACH). 



