26 Crustacea and Echinodermata of the 



tinct from the Telmessus serratus of White. Platycorystes 

 (Podocanthus) Isenbeckii of Brandt is also properly placed 

 in this genus, and I have recently discovered a new species 

 in the seas of Northern Japan. 



The reference to Latreille's work, (Les Crustaces, les 

 Arachnides, et les Insectes distribue's en families naturelles, 

 Paris, 1825,) for Cheiragonus is given on the authority of 

 Brandt. This book I have never seen, but it is said to 

 have been republished in Cuvier's " Regne Animal" — 

 edition of 1829. In this latter publication the name Cheir- 

 agonus certainly does not occur, which is singular, and it 

 is also remarkable that it should have been entirely over- 

 looked by Milne-Edwards. The name occurs, however, 

 in the " Index Universalis" of Agassiz, and must undoubt- 

 edly have been published somewhere by Latreille in 1826. 

 Whether this author gives a generic character, or a simple 

 reference to Tilesius's description ; and whether he desig- 

 nates the species as C. hippocarcinoides, I am of course un- 

 able to say. If this specific name were not given we must 

 call the species C. ambigttus, for Tilesius's reference to 

 Steller's MS. name hippocarcinoides is not sufficient to 

 give it priority. 



Tribe CATOMETOPA. 



gpapsus strigosus. Latreille. 



Grapsus strigosus, Latreille. Goniopsis strigosus, De IIaan ; White, Brit. 

 Mux. Catalogue, Crust. 40. 



Specimens in the British Museum, from Lower Califor- 

 nia, are referred to this species by White. 



grapsus pictus. De Saussure. 



Grapsus pictus, De Saussure ; Rev. el May. de ZoOlogie, v. 3G2. 



This is in all probability not the Grapsus pictus of La- 

 treille. It may be either G. oniattts, M. Ed., or a new 

 species ; and is not improbably the same as the preceding. 



Mazatlan, (M. Verreaux.) 



