128 
PROFESSOR A. MACALISTER ON THE 
lost in the plagiopatagium ; it is a very slender muscle-bundle in this animal, and can- 
not be traced for more than half an inch ; it overlies the pronator teres. In Ceplialotes 
this also exists, and it makes a conspicuous ridge, as may be seen in St.-Hilaire’s figure 
of this species (Annales du Museum d’Histoire Naturelle, tom. xv. pi. 7). I was not able 
to make out accurately in this species whether any fibres came from the biceps or no, as 
Professor Humphry has so well described in I J ter opus ; certainly the largest part of its 
fibres arise from the humerus. 
7. Cutaneo-pubic (Humphry) I could only separate in the larger species as an expan- 
sion of fine muscular fibres from the neighbourhood of the pubes ; these ascended and 
passed backwards in a narrow stream, which ended over the great pectoral at its shoulder 
end by being attached to the skin. I could only find it in the Phyllostomine and Ptero- 
pine Bats and in the Noctule. I could not trace it to a bony attachment, but Professor 
Humphry has traced it to the fore part of the pelvis. The same anatomist traced in 
Pterojms one fascicle of the muscle to the lower margin of the plagiopatagium. 
8. Femoro-cutaneus (Humphry) was only found in the Pt.eropi, Macroglossus , and 
Artibeus , arising from the tibial side of the thigh (in my specimen not so low down or 
so purely from the bone as Professor Humphry describes it to have been in his Pt. Ed- 
wardsii ) ; passing in a radiating manner upwards and inwards, it is inserted into the inte- 
gument of the middle line of the back, over the gluteal muscles, and as high as the 
middle of the lumbar region. 
9. Ischio-cutaneus (Plate XIII. fig. 1, e), thin and band-like, I found in Eleutherurct 
marginata passing in the uropatagium from the ischium to the integument over the 
calcaneum and dorsum of the foot. Professor Humphry found the same in the Pt. Ed- 
wardsii. It is possible that this may be the representative of the biceps flexor cruris 
diminished to a rudiment. I did not find it in any other species. 
Other cutaneous fibres here and there were found in the patagial membranes of other 
species. Professor Kolexati has found in some species one of these fascicles between the 
pectoralis major and the serratus magnus, and inserted into the plagiopatagium; this 
he calls the corrugator plagiopatagii (Flughautrunzler). In the Myotus murinus he 
figures this (Allgemeine dutsche naturhistorische Zeitung, iii. Band, lste Heft, p. 10, 
Taf. III. a *). I have not, however, been able to make out, in any species except Noc- 
tulina altivolans, any muscular band of sufficient size to merit a distinct name in this 
position. Single bands of fibres do run in this and other directions in the membrane, 
but they are not worthy of distinct names. 
10. At the close of the muscles of this group we may place one of the most remark- 
able of the muscles found in the organization of the Bat, the occipito-pollicalis of 
Kolenati (Plate XIII. figs. 1, 2, 4 & 5, a, Plate XV. figs. 1, q, Sc 2, c ), although its claim 
to be regarded as a muscle of this group rests on a very slender foundation. This 
muscle arises from the superior curved line on the occipital bone for a varying extent ; 
in Ceplialotes Pallasii it extends for nearly the whole length of the ridge, in Noctulina 
it is attached to its outer third, in Eleutherura to its outer fifth, in Artibeus to the 
