302 



June 19, 1850. 



Dr. Samuel Cabot, Jr. in the Chair. 



Present, sixteen members. 



Mr. Girard read some additional observations on the 

 nomenclature and classification of the fishes of the genus 

 Cottus. 



Having had an opportunity of examining the Ichthyology of 

 the Voyage of the Sulphur, lately added to the library of the 

 Society, I have been able to satisfy myself of the perfect identity 

 of the genus Centridermiclithys of Sir John Richardson, and 

 Trachidermis of Mr. Heckel, Cottus asper excluded, and to settle 

 the doubts I had entertained respecting the difference of these 

 two genera and the impropriety of placing C. asper in either 

 one of them. 



The genus Centridermichthys, therefore, must be given up, 

 and its species included among Trachidermis, in which I also 

 place Cottus intermedius of the Fauna of Japan. 



The synonymy of the genus Traclddermis will stand, at the 

 present time, as follows : 



Trachidermis fasciatus Heck. Ann. Wien. Mus. ii. 18.37, 

 p. 159, pi. 9, figs. 1 & 2. — Philippine Island ; — Heckel. 



Trachidermis uncinatus Grd. — Cottus uncinatus Temm. & 

 ScHL. in Sieh. Faun. Japon. 1843, p. 38. — Centrider- 

 raichthys uncinatus Rich. Rep. Ichth. of the China Seas 

 and Japan, 1846. p. 216. — Cejitridermichthys ansatus 

 Rich. Ichth. of the Voy. of the Sulphur, 1844, p. 74, PL 

 54, fig. 6- 10. — China Seas; — Richardson. 



Trachiderbiis imterbiedius Grd. — Cottus intermedius, Tetsim. 

 & Schl. in Sieh. Faun. Japon. 1843, p. 38. — Rich. Rep. 

 Ichth. of the China Seas and Japan, 1846, p. 218. — Jesse 

 Island ; — Siebold. 



