LATERAL MUSCLE IN TELEOSTEI. 
Views of the Authors cited. 
325 
WIEDERSHEIM (9). KNAUER (5). DiETz (2). CHEVREL (1). 
Superficial. | Deep 
I 
I 
{ 
5) ( Posterior, external, 
Im, Dorsal proper. or superficial 
f I Pyramids. 
| Straight Dorsal 
| Sa eae 
r Dorsal Portion. BS GFe ime ag 
I Portion. 
| | Back I Anterior, internal, 
(Riicken) Pleuro-Dorsal. or deep Pyra- 
| > Musculature. | mids. 
B I 
Lat. line muscle. Red fibres. 
Se loaaepeoooeocead 
| | Lat. line muscle. Red fibres. 
I 
Oblique I ( Anterior, internal, 
) ( Analogue J Back-muscle. ieee Pleuro-Ventral. or deep Pyra- 
| | of Obliquus. i mids. 
Ventral eee Ventral 
L ; 1 Oblique 
Portion. | Analogue Belly ' Belly-muscles. Portion. 
of Rectus. (Bauch) Posterior, external, 
Musculature. | Ventral Proper. or superficial 
(Recitus). Pyramids. 
Straight Belly-muscles. 
Muscles gréles. 
contains the lower backwardly directed arms as the latero-dorsal 
portion (see text-fig. 2, I7.D., L.D. p. 331). In the trunk region 
there is no distinction between the mesio-dorsal and the latero- 
dorsal portions except in the direction of their fibres, and, even 
then, the differently directed fibres are connected by a transitional 
area. ‘Tracing these portions forwards to the back of the head 
the two are found gradually to be severed from one another ; 
strong fasciz separate them; their transverse divisions begin 
successively to fade and disappear; and, finally, they are inserted 
on the skull, the mesio-dorsal portion on its roof (supraoccipital), 
the latero-dorsal portion on its side (exoccipital and otic recess) 
and on the post-temporal; the last named gives off a superficial 
branch to the supraclavicle (Llennius pholis) or to the cleithrum 
itself (Cottws scorpius, where it is attached to the posterior border 
of the backwardly directed spine in which that bone ends), 
In the little gobiiform fish, Periophthalmus, the mesio-dorsal 
portion is attached to the upper border of the post-temporal as 
well as to the supraoccipital ; but this so far as my observations 
go is an exceptional occurrence. 
22* 
