. 
996 DR. R. 0. CUNNINGHAM ON ABNORMAL [ Dee. 15, 
meist nicht zu sehen ist, weil fast alle Salpenarten symmetrische 
Muskeln haben.” 
This adds an eighteenth species to the list of Salpw occurring in 
the North Atlantic. It was obtained at two stations (four hauls) 
in small quantities: Sta. 13, 60° 2’ N., 5° 49’ W.; and Sta. 19, 
59° 42' N., 7° 7' W. On these four hauls it was at the surface ; 
in two more hauls at the same stations it was also taken from 
uncertain horizons with an open tow-net, probably at or near the 
surface. 
EXPLANATION OF PLATE L. 
Sagitta whartont, sp. un. (p. 992). 
Fig. 1. Ventral view. x 2. 
Fig. 2. Dorsal view of head, showing some of the cirrhi, the two rows of 
accessory teeth, and the row of sensory processes. Oam. luc. x 12. 
Fig. 8. Cephalic armature. a, end of cirrhus; 0, tooth of ventral row; 
c, tooth of dorsal row. X 210. 
Spadella (Krohnia) hamata (p. 993). 
(Drawn by camera lucida.) 
Fig. 4. Ventral view. X 2. 
Salpa asymmetrica, sp. n. (p. 99+). 
a—f. main muscles of the mantle. en. endostyle. 
at. atriopore. ne. nerye-ganglion. 
el. cloaca, nw. nucleus. 
dl, dorsal lamina. pl. placenta. 
dt. dorsal tubercle. st. stolon. 
el. elxoblast. 
5. Sexual form, dorsal aspect. Xx 4°. 
6. Sexual form, ventral aspect. x 4:5. 
Fig. 7. Solitary form, right side. x 16. 
8. Solitary form, left side. x 16. 
2. On the Occurrence of a Pair of Supernumerary Bones in 
the Skull of a Lemur and on a Peculiarity in the Skull 
of a young Orang. By Roserr O. Cunninenam, M.D., 
F.L.S., F.G.S., C.M.Z.S., Professor of Natural History, 
Queen’s College, Belfast. 
[Received November 9, 1896.] 
A short time ago, when taking part in an oral examination on 
zoology at the Royal University of Ireland, Dublin, I was some- 
what surprised to recognize in the skull of a common Lemur a 
small pair of supernumerary bones intervening between the 
frontals, nasals, and lachrymals.. As I could not find any reference 
to such bones in any of the works on comparative anatomy at my 
disposal, I wrote to Sir William Flower, as our highest authority 
on the osteology of the Mammalia, to ask him if he could furnish 
me with any information on the point. He kindly handed my 
letter with its accompanying sketch to Dr. Forsyth Major, who 
showed him a skull with exactly the same bones, observing that 
