420 



phot. p. Sc. mtlfCAN ox echixoedea 



10. Ceypeastee (Monostychia) aesteaeis, Laube, op. cit. p. 190. 



Arachnoides australis, Dune. op. cit. p. 48. 



Araclinoides australis, var. elongatus, Dune. op. cit. p. 48. 



Clypeaster (MonostycMa) Loveni, Dune. 



11. Clypeastee (aIoxosiycecia) Lovexi, Dune. op. cit. p. 47. 



It is proposed to omit Ecliinaracluiius parma from the list, and it 

 is necessary to observe that fragments of a species of Fibularia and 

 of an allied genus are in the collection at the British iluseum. 



12. Echixoeeisses aesteaeee, Dune. * 



There is nothing to add to the description of this species, which 

 is closely allied to the recent species of the subgenus Nucleolites. 

 The anal groove is long and pronounced in the Australian species, 

 and, moreover, some of the pairs of pores are conjugate and others 

 non-conjugate. 



13. Catopyges elegaxs, Laube f. 



It will be interesting to know whether this species differs from 

 the Cretaceous species in the same manner as the recent Catopygus 

 receris does. This last-mentioned species has but a single row of 

 pores, reaching from the petaloid part of the ambulacra to the 

 peristome, and not a row of pairs of pores on either side of the 

 ambulacra. The position of the periproct is not that of the Cre- 

 taceous forms. See A. Agassiz, ' Report on Challenger Echini/ 

 p. 123. I believe that the Tertiary and recent Catopygi should be 

 placed in a subgenus. 



14. Pygoeeyxches Yassali, bright t. 



15. Echixola3ipas ovtjlt73i, Laube §. 



This species was very shortly described by Laube and not figured. 

 The measurements of the test were not given. The pentagonal, ovoid, 

 and somewhat rostrated high form and the very broad ambulacra 

 distinguish the species from all others. A specimen in the British 

 Museum, Blar.ford collection, is 57 millim. long, 49 millim. broad, and 

 33 millim. high. There is but slight difference between the lengths 

 of the poriferous zones and the antero-lateral ambulacrum, 20 

 millim. long and 8 millim. broad, the posterior one 23 millim. 

 long and 95 millim. broad. 



16. Holastee atj stealer:, Dune. op. cit. p. 51, pi. iii. figs. 12 

 and 13. 



There is no alteration required in the description of this species 



* Dune. Quart. Joum. Geol. Soc, vol. sxxiii. p. 50. 

 t Laube, op. cit. p. 190, fig. 7. 

 | Dune. op. cit. p 51. 

 § Laube, op. cit. p. 191. 



