230 Dr. A. Giintlier on some neio 



■which it occurs, sparing no labour to ensure complete accuracy, 

 the reliability of the geological portion of the present paper is 

 entirely due. 



To- the kindly criticism of my friend and colleague Professor 

 T. Rupert Jones, F.R.S.; during the course of my work, I owe 

 a good deal ; and it is no small tiling that in the results, as 

 detailed in the foregoing pages, I have the entire concurrence 

 of one who has contributed so much to place the classification 

 and nomenclature of the genus Nummulina on an intelligible 



EXPLANATION OF PLATE XII. 



Fig. 1 represents the lateral aspect, ^,^. 2 the periphero-lateral aspect of 

 Numnudwa jji-istina, magnified 50 diameters. Except a very 

 trifling portion of the last convolution (which is broken away), 

 this specimen is quite perfect. 



Fig. 3 is a very accurate di'awiug of a transverse section, almost entire, 

 magnitied 100 diameters. It shows the somewhat large primor- 

 dial chamber, the investing character of the alar lobes of the 

 chambers of the spire, and the lamination of the test arising 

 therefrom. The general tubulation of the shell is well seen ; and 

 at the lower end of the drawing indications of the marginal cord 

 may be distinctly traced, though wanting in definition. 



Fig. 4 is from a specimen accidentally split at the median plane, magnified 

 50 diameters ; one of several, more or less perfect, found in this 

 condition. The tendency to split hoi'izontally at the median 

 line is of itself a Nummuline peculiai'ity of some significance. 



Fig. 5 shows a small portion of a horizontal section, much more highly 

 magnified (200 diameters), the object being to demonstrate the 

 existence of a canal-system in the septa and peripheral region. 

 More difficulty has been experienced in obtaining good horizontal 

 sections than transverse ; this, however, has been sufficient to 

 yield to Mr. Hollick (who has drawn direct from the object) very 

 characteristic details of structure at one point in the peripheral 

 convolution. 



XXXII. — Notice of some new Species of Fishes from Morocco. 

 By Dr. Albert Gcnther, F.R.S., Foreign Member of the 

 Senckenberg Society of Frankfort. 



[Plates XIII. & XIV.] 



A SMALL collection of marine and freshwater fishes, made by 

 Dr. Rein and Dr. C. von Fritsch during their journey in 

 Morocco, was placed by the former gentleman in my hands 

 for examination. It contained four new species, which may 

 be characterized as follows : — 



Serranus atricauda. 

 D. g. A. f. L. lat. 115. 

 I am unable to identify a specimen from Mogador with any 



