10 
Sp. Char. — The type species, attaining a length of about 0'2, Length 
of head -vvitli o])crcnlar apparatus contained about one-and-a-half times in tiic 
maximum depth of the trunk, and someavhat less than one- quarter of the total 
length of the tish ; the caudal ])edicle one-third as de(‘p as the abdominal 
region at its highest point where the dorsal lin arises. Pelvic tins arising 
opposite the origin of the dorsal, and the latter completely in advance of 
the anal ; dorsal rays about fourteen, anal rays ten in number. Seales 
ornamented with coarse crimpings, which are slightly radiating, and usually 
confined to tlie liindcr half. 
Head a ad Opercular Apparatus. — The head of idl the specimens is 
only im])erfectly shown in impression. The form of the cranial roof is 
indicated in the original of PI. Ill, Pig. 3, Avhcrc the impressions of the 
lati'ral sensory canals form deep grooves ; and the proportions of the orbit, 
crossed by the parasphenoid, ai'c shown in the ty])c (PI. Ill, Pig. 1). There 
are traces of coars(' riiga* and tubercles on the cranial roof (No. e)\ the facial 
liones seem to liaA'c been more finely tnbereulatcd (No. h) ; and there arc 
impressions of sparse elongated tubercles on the branchiostegal rays in No. d. 
A regidar, close marginal series of small, stout, conical teeth can be dis- 
tinguished (PI. Ill, Pig. 3) ; and there are indications a])parcntly of minute 
granular teeth on some of the inner bones of the mouth. The gular plate is 
large ( PI. Ill, Pig. 2), and it is folloAved behind by short and broad branchi- 
ostegal rays. There is no definite information as to the form and ])ro])ortions 
of the operculum and subo])ercnliiin. 
Axial Skeleton of Trunk. — There seem to h;ive been no ossifications 
in the notochordal sheath in tlie abdominal region ; but distinct pleuroeentra 
and hy])ocentra are observable in the caudal region, especially in the type 
(PI. Ill, Pig. 1). The neural and lucmal arches are also Avell ossified in 
the caudal region, but ajiparently less so in the abdominal region; and 
it is difficult to decide Avhether there Avcrc AA'ell-dcA'elopcd ribs, although 
a})pcarances in Nos. h and c are suggestiA'e of such liaA'ing been jircsent. 
The lucmal ardu's, as usual, become especially robust at the base of the 
caudal fin. 
Appendicular Skeleton . — No satisfactory remains of the arches 
supporting the jiaircd fins arc presen’ed, the claA’ielc only being recognisable 
as a sickle-shaped bone Avitli a fcAV longitudinal striations near its postero- 
inferior border. All the fins exhibit fulcra, Avbieh seem to be uniscrial, and 
are largest on tlie upper lobe of the tail. The liii-rnys are undivided for some 
