230 Dr. V. Sterki on the 



occipital and upper opercular regions. The distanci between 

 the eye and the dorsal equals the distance between tlie end of 

 the snout and the preopercle. Dorsal VI, 15^ the two portions 

 very narrowly separated ; the longest soft rays ^ length of 

 head, a little longer than the rays of the first fin, the base of 

 which measures ^ its distance from end of snout. . Anal with 

 12 rays. Pectoral | length of iiead, with silk-like upper 

 rays. Ventral not rciiching vent, with well-developed ante- 

 rior flap forming an obtusely pointed process on each side. 

 Caudal rounded. Caudal peduncle as long as deep. 61 scales 

 in a longitudinal series, 22 between dorsal and anal. Greenish 

 to blackish olive, more or less spotted and marbled with 

 black ; dorsal and caudal fins spotted with black ; ventral 

 whitish ; yellowish white beneath. 



Total length 19 centimetres. 



Of the two British species with which this Gohius may 

 have been confounded, G. paganellus and G. niger differ in 

 the larger scales, there not being more than 17 between the 

 dorsal and the anterior rays of the anal and 55 in a lateral 

 series, and in the absence of the antero-lateral lobe of the 

 ventral disk. Gunther's statement (Cat. Fish. iii. p. 56) 

 that the interorbital space is scaly in G. capita is erroneous ; 

 a specimen with 17 longitudinal series of scales between the 

 dorsal and anal fins, put down by the same author as G. capita 

 (spec. &), has only 55 scales in the lateral line, and is, in fact, 

 a G. paganellus. Fine large specimens from the Bosphorus, 

 received from Dr. Dickson since the publication of the British 

 Museum Catalogue, have been carefully compared with the 

 specimen described above, which affords the first evidence of 

 the presence of G. capita in the English Channel. 



XXI II. — On the Classification of Ciliate Infusoria. 

 By Dr. V. Sterki *. 



After so eminent a naturalist as Biitschli has modified 

 Stein's system of Ciliata, it may appear rather assuming if I 

 venture to propose some changes. It is done because my 

 views have long been held, and have been confirmed as the 

 years passed. 



In the first place, it seems that the Peritricha are of an 

 organization quite different from that of all other ciliates. 

 The formation of the anterior part, peristome, mouth, &c., is 



* From ' The American Naturalist,' vol. xxxii. no. 378, pp. 425-428. 



