11g 
Pennella orthagorisci, Wright. 
1829-1843. Pennella filosa, Guérin-Méneville, Iconographie du 
Régne Animal, Zoophytes, p. 11, Pl. 9, fig. 3. 
1870. Pennella orthagorisci, Wright, Ann. Nat. Hist., Ser. 4, 
ValiV.; p. 43, bbe 
189%. Penella filosa (part), Bassett-Smith, Proc. Zool. Soc. 
London, p. 483. 
Guérin-Méneville, who follows Cuvier in the classification 
of this genus, does not specify the fish from which his unde- 
scribed figure of the species was taken. Steenstrup and Lutken 
observe that all the large individuals of Pennella, which the 
Copenhagen Museum in heir day possessed from Orthagoriscus- 
like fishes, had three horns, whereas Guérin’s figure seems to 
represent a two-horned animal. Guérin’s figure certainly 
shows no indication of a third post-cephalic process, nor is 
there any in the specimen with which we are now concerned. 
In sending it, Dr. Gilchrist wrote as follows :—‘‘ It was found 
imbedded in the tissue at the base of the dorsal fin of a sun fish 
(Orthagoériscus mola) caught in Table Bay. The colourless half 
of the animal was imbedded, the coloured part with the 
attached barnacle being free. The bend wh ch you will observe 
was quite the same when cut out from the flesh of the sun fish. 
The head with the two barb-like projections was in a small 
pocket of abnormal tissue.” 
The correspondence with Guérin’s figure is too close to admit 
o: any doubt as to the specific identity. At the same time the 
proportions do not exactly agree. The part answering to the 
imbedded *‘ neck ”’ is in his figure only an inch and three-fifths 
long, the remainder two inches and a third, giving with the head 
a total of four inches. In the South African specimen the 
“neck ”’ is two inches and a third in length, the remainder two 
nches, the total four inches and a half. In each case the 
penniform abdomen is about three quarters of an inch long, 
but Guérin represents the filaments as more thread-like than 
they are in our specimen, and without the branching which 
can, upon close inspection, be seen in the latter, in some corres- 
pondence with the figure assigned by Steenstrup and Liitken 
to P. filosa. The specimen described by Dr. E. P. Wright, 
which was taken in 1869 from an Orthagoriscus mola in Cork 
Harbour, had a total length of seven inches, the thoracic region 
being five inches and three quarters long. The cephalic horn- 
like appendages were each an inch and a half in length, and the 
ovisacs eleven inches long. Figure 6 on Dr. Wright’s plate is 
explained as “ Head of second specimen, showing the compara- 
