144 
. 
The examination of a special collection of fish made in con- 
nection with the important practical question of the destruc- 
tion of immature forms by certain methods of fishing has 
thrown some light on this subject. The following is a list of 
these fish —(1) Atherina breviceps (adult), (2) Spratelloides 
estuarius, n. sp. (adult), (3) Clupea sagax (young), (4) En- 
eraulis holodon (young), (5) Chrysophrys holubi (young and 
adult), (6) Sciena aquila (young), (7) Pagellus hthognathus 
(young), (8) Mugil algoensis, n. sp. (adult). 
The first four were popularly regarded as young forms of 
one species: of these the only young forms were 3 and 4, 
a young herring and a young anchovy respectively, the adults 
of which will be found in- the deeper waters and may yet 
prove of commercial value. No. 5 is known as the ‘“ White 
Stumpnose’ and thought to be the young of the ordinary 
White Stumpnose (Chrysophrys globiceps). It proves, how- 
ever, to be a different species (C. holubi), of a much smaller 
size. Nos. 6 and 7 are undoubtedly young and immature 
forms of sea-fish. No. 8 is not, as is supposed, the immature 
form of the ordinary ‘“ harder *’ but belongs to a different and 
smaller species. 
In Part I., Vol. I., of the ‘‘ Marine Investigatiqns ”’ a list of 
tne known species of the flat fishes of Cape Colony was given. 
These were then six in number. With the addition of one 
species recorded from Natal and another (Synaptura puncta- 
tissima, Peters) recorded by Steindachner from “ Algsa Bay "’ 
(probably a misprint for Algoa Bay, at Port Elizabeth) the 
total number of known South African Flat Fishes was eight. 
The addition of another 20 species necessitates the enlarge- 
ment of this key (vide p. 163). 
The following is a classified list of all the species here dealt 
with. New species and genera are indicated by darker type :— 
Order. Family. Page. 
1. Polyprion americanum Acanthopterygu Serranidae eS 
2. Tetraroge monacanthus Scorpaenidae eeltas 
3. = gymnoderma = Ss wes Ob 
4. Monocentris japonicus a Berycidae 148 
;. Cottunculus Spinosus R Cottidae 149 
6. 7 macrocephalus _ re 149 
7. Cyttosoma boops a Zeidae 150 
5. e verrucosum 23 151 
o. Pseudocyttus maculatus 2 153 
10. Neocyttus rhomboidalis a 2 153 
11. Zeus japonicus » + 154 
12 capensis » » 15 
13. Laemonema globiceps Anacanthini Gadidae 15 
14. Barathronus bicolor x Ophidiidae 158 
1s, Cataetyx messieri ? ie 159 
1 
. Porogadus miles 
”» 
