394 Description of a collection of Fishes from China. 



First. A very striking form of the genus Hetrobranchus of 

 GeofFroy. Indeed this new form must constitute a distinct 

 genus of itself. The new genus (Cossyphus), in addition to 

 the arborescent appendages to the third and fourth branchial 

 arches, presents them also on the second arch : and instead 

 of the caudal being a distinct fin from the anal and dorsal, 

 as in M. GeofFroy's genus, there may be some question as to 

 the existence of a caudal at all ; but if there be one, it must 

 be in union with the anal and dorsal. 



Second. Two undescribed species of the genus Anguilla^ 

 both from Chusan; both distinguished from the eels of Eu- 

 rope, by the number of their fin rays. 



The other accessions to this order in the proposed genus 

 Muroenesox, are less exclusively due to this collection, for I 

 have been long acquainted with several Bengal species, al- 

 though it is probable I should have postponed their des- 

 cription to some future period, had it not become necessary 

 to say something of the species contained in Dr. Playfair's 

 collection. The Bengal species of the proposed genus 

 Pneumahranchus^ of which there are several, I could not 

 consistently introduce in this place, but hope to describe 

 them in the next number. 



The following is a list of species contained in Dr. G. R. 

 Playfair's valuable collection made at Chusan and Ningpo, 

 including the following four new genera; namely, Chceto- 

 Mus, CossYPHUS, MuRCENESox, and Pneumabranchus. 



1. — Salt or Sea-water fishes, before undescribed. 



HOLOCENTRUM MACULATUM, 

 SeBASTES SINENSIS, 



Trigla spinosa, 

 Tetradon fasciatus, 

 Chcetomus playfairii. 

 ^. — Estuary species, before undescribed. 



PiMELODUS ASPERUS, 

 SiLURUS sinensis, 



