A history of British star-fishes, and other animals of the class Echinodermata . with which he unites Asterina. In this paperMuller maintains that one of the five intermediate inferiorplates of the Ophiuridse bears a madreporiform tubercle,or rather corresponds to that body, a view which I am notinclined to adopt. The other Memoir to which I must allude is one by on the Starfishes, which he calls the class Hypostoma,and defines somewhat ambiguously, published simultane-ously with my two first numbers, in the Annals of NaturalHistory. I am afraid I must censure Mr. Gray for chang- X PKE


A history of British star-fishes, and other animals of the class Echinodermata . with which he unites Asterina. In this paperMuller maintains that one of the five intermediate inferiorplates of the Ophiuridse bears a madreporiform tubercle,or rather corresponds to that body, a view which I am notinclined to adopt. The other Memoir to which I must allude is one by on the Starfishes, which he calls the class Hypostoma,and defines somewhat ambiguously, published simultane-ously with my two first numbers, in the Annals of NaturalHistory. I am afraid I must censure Mr. Gray for chang- X PKEFACE. ing names still more than Muller, and with less is a pity zoologists do not take a lesson from their fellowlabourers in the field of Nature, the botanists, in thisrespect. Mr. Gray has increased the confusion by givingfragments of descriptions instead of generic and specificcharacters, probably from carrying too far a laudable desirefor brevity. His essay deserves praise, however, for re-cording many new foreign habitats of the beautiful animalshe • INTRODUCTION.


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