RECENT OPHIURANS. 167 



new species in the present connection. For this favor, I offer him my sincere 

 thanks. Six new genera are proposed and a few preoccupied specific names 

 are replaced. The derivations of the new names selected are given, except 

 when they are perfectly obvious (as parva, hybrida, etc.), and the reason for the 

 selection of the name is also referred to in the text. 



At the end of each genus, there is a Ust of the species, not represented in 

 the M. C. Z. collection. In this Ust are included all properly described species, 

 which seem referable to the genus. When my opinion differs from that of the 

 author of the species, the genus in which he placed the form is given in paren- 

 theses. The type locality is also given. I have included in these lists many 

 species whose status is open to doubt, but all nomina nuda, all species positively 

 not identifiable, and all nominal species, which are doubtless synonyms of pre- 

 viously described species are omitted. At the end of each family is given a 

 list of the genera, not in the M. C. Z. collection, and of their component species. 



This catalogue is a list of all ophiiu-ans described up to January 1, 1915. 

 It is too much to expect that there are no omissions whatever but a serious 

 attempt has been made to have the list complete. While no synonymy is given 

 in the main body of the text, the indexes are supposed to include every generic 

 and specific name hitherto given to Recent ophiurans. By means of these 

 indexes, the present status of any genus or species can be promptly determined. 

 It is hoped that this brief and compact arrangement will make the catalogue of 

 real value. 



Photographic illustrations of the new species described are given and to 

 these are added similar figures of many species hitherto described but not figured. 

 References to figures, when such already exist, will be found under each species; 

 absence of such a reference indicates that the species has never been figured. 

 Colored figxires are remarkably rare. Mr. Lyman gave thirteen in his Catalogue 

 of fifty years ago and Koehler has some equally fine ones in his Princesse- Alice 

 Echinodermes. All of these are referred to under the proper species. The 

 colored figures published by Herklots in 1869 do not seem sufficiently accurate, 

 with one or two exceptions, to warrant reference to them; they may represent 

 accurately the specimens drawn but they are not representative of the species. 

 Finally, it is interesting to compare our present knowledge of ophiurans with 

 that of fifty years ago, before any deep water collecting had been done. In 

 1865, Mr. Lyman listed 183 species of which 102 were in the M. C. Z. collection. 

 These species were grouped in thirty-three genera, of which all but one are still 

 recognized as valid generic groups, although the Umits are in some cases much 



