BERMUDA ECHINODERMS. 411 



examination I refer them without hesitation to Ludvvig's Ciicu- 

 maria punctata, described from a specimen collected in Barba- 

 does. In a few details they differ from that species : the 

 color being apparently different, the stone csnal free, only 

 one polian vessel, and the- anus armed with five small cal- 

 careous teeth. The calcareous buttons are so numerous 

 in some places that the skin is very hard, the layer of but- 

 tons being .4 mm. thick. Professor Heilprin describes from a 

 single specimen a new species of Qicuniana which he calls 

 Sempcria bcnnudioisis. While I have no way of proving that 

 this is the same species as the specimens before me, the differ- 

 ences which he points out between it and Ludwig's C. punctata 

 do not seem to me important, and I strongly suspect that S. 

 bcruuidioisis Heilp. ought to be put down as a synonym of C. 

 piuictata Ludw. I am at a loss to understand what Professor 

 Heilprin means by the " long back processes " of the calcareous 

 ring ** for the attachment of the powerful retractor muscles." 

 So far as I know the retractor muscles of Cnciiniaria and 

 TJiyriic are never attached to the posterior prolongations of the 

 radial pieces of the calcareous ring but always to anterior pro- 

 longations. The latter are quite long in Cncumaria punctata. 

 In the light of these facts, I append the following revised list 

 of the littoral echinoderms of Bermuda, as complete as I have 

 been able to make it. It does not pretend to include the deeper 

 water species collected in the vicinity of the islands by the 

 '' Challenger." 



CATALOGUE OF THE LITTORAL ECHINO- 

 DERMS OF BERMUDA. 



ASTEROIDS. 



1. Asterias tenuispina Lamk. = A. atlantica Verrill. Com- 

 mon. Collected by all parties. 



2. Asterina folium Ltk. Not very common. " One speci- 

 men collected by the '' Challenger " and five by the New York 

 University party. 



