56 MESSRS. MURIE AND MIVART ON THE 
between them can be defined; and its hindmost part is inserted into the posterior verte- 
bral margin and adjacent part of the axillary border of the scapula ' (PI. III. fig. 8, Rh). 
Ruompomevs capitis.—An exceedingly long and thin strip. It arises from the 
occiput, and is inserted, by a very delicate tendon, just beneath the anterior end of the 
insertion of the single rhomboideus muscle. At its insertion it is closely attached to 
the levator anguli scapule. 
In L. varius Cuvier represents it as rather strong (/.c. pl. 69. fig. 2, ¢). Its insertion 
is shown in ZL. catta, pl. 71. fig. 1, ¢. 
If at all present in Galago allenii, it is most intimately united with the trapezius; and 
in G. crassicaudatus the tendency to separation from the conjoined rhomboideus major 
and minor is very faint, as is delineated in PI. IIL. fig. 6. Its presence is noted by 
Kingma in G. peli”. 
In Nycticebus this muscle presents nearly the same conditions as in Lemur catta. In 
the Potto the existence of this muscle is not noticed by Van Campen. 
In Tarsius* a rhomboideus capitis is evidently present, but is said only to extend to 
the ligamentum nuche. 
In Cheiromys this muscle is rather fleshy. — Its insertion into the anterior vertebral 
angle of the scapula is also covered by that of the single rhomboideus. 
LEVATOR CLAVICULZ.—In Lemur catta this is a long band of muscular fibres which 
arises from the ventral surface of the transverse process of the atlas, and is inserted into 
the spine of the scapula—not, however, into the true acromion process, but into the 
triangular backwardly (downwardly) projecting metacromion-like process, which is so 
strongly developed in Lemur. At its insertion it overlaps * and is entirely superficial to 
the trapezius, the insertion of which last is continued on to the very extremity of the 
acromion process. ‘This, combined with its very different origin, makes it difficult to 
understand how Meckel ® could have thought that this muscle might “ dans les Makis” 
be easily taken for the otherwise absent clavicular portion of the trapezius. 
Figured in Galago crassicaudatus (Pl. II. fig. 8, Pl. ILL figs. 5, 6, & 7, and Pl. IV. 
figs. 13 & 14. L.cl). The presence of this muscle is noted by Kingma® in G. peli. 
We found it present also in Loris gracilis and in Nycticebus tardigradus’, but with 
an insertion only into the outer end of the clavicle, as Cuvier seems to have found it®. 
This muscle is absent, according to Van Campen, in the Potto®’. Burmeister, in 
Tarsius”, describes this muscle under the name of the levator anticus scapule. 
It is not distinctly mentioned by Owen as existing in Chetromys, but in our specimen 
was very largely developed and inserted broadly into rather more than the middle third 
! This part is probably the depressor scapule. ? Loe. cit. p. 23. 
* Loc. cit. p. 47, tab. 4. fig. 2. The smaller and upper muscle marked with the figure 6. 
* As shown by Cuvier in Z. varius, pl. 69. fig. 2, d. 5° Op. cit. vol. vi. p. 238. 
5 Loc. cit. p. 22. 7 P.Z.8. 1865, p. 243. 8 Loe. cit. pl. 67. fig. 2, d. 
9 Loe, cit. p. dl. © Loe. cit. p. 46, tab. 4. fig. 1. 3. 
