108 



Crangon nigricauda Stm., Proc. Cal. Acad., i, 89; Jour. Bost. Soc., vi, 

 496. Crangon vulgaris Owen, Zool. Beechey's Voyage, p. 87; 

 Dana, U. S.. Ex. Ex. Crust., i, 536. Crangon nigromaculata 

 Lockiugton, 1. c., Feb. 7, 1876: 



Nothing but a color variety of C. nigricauda. 



In addition we have received types of the four following 

 species, but reserve them for further study : Mithraculus 

 triangulatus, Xantho novem-dentatus, Xanthodes? angus- 

 tus, and Xanthodes leucomanus. 



In the five papers by Mr. Lockington, quoted above, he 

 describes fifty-eight supposed new species and institutes 

 eight new genera. His Libinia setosa is a valid species 

 and has since been redescribed in "Bulletin No. 7" of the 

 National Museum by Dr. Streets as L. semizonale. Mr. 

 Lockington's name, however, will hold. Idotea pulchra 

 Lockiugton, is, we are informed by the describer, /. bi- 

 cuspida Owen. Idotea marmorata. Packard (Memoirs 

 of the Boston Society, Vol. i, p. 296, pi. viii, f. 6) also 

 appears to be the same. 



Concerning the other species described by Mr. Lock- 

 ington, we have nothing to say. Only by a study of his 

 types can one be sure of what species he had before him. 

 His work, as will be seen by our review of the few of 

 his types that have come under examination, has been 

 extremely careless and untrustworthy. With so little 

 access to the literature of the subject, he should not have 

 attempted systematic work. 



