"^'iSi!^,i:t" ^MMm in the Uni.

86
PISCES.
and describes (Ichth. gener. ii. pp. 322-369) 17 species of Lejridosteu-s, 8 of
Cylindrosteus, and 5 of Atractosteus: altogether 30 species, the majority of
which are named by the author ! The heads of several are figured on pis. 21
&22.
Amia. Dr. Gunther states that there is only one species of Amia (calra),
'Fish. viii. p. 325.—Prof. Dunieril describes 11 species, adding 2 to those
previously named, Ichth. gener. ii. pp. 416-426, pi. 25 (head &c).
HOLOCEPHALA.
Callorhynchus. There is only one species known at present, C. pcvonii (A-
Dum.) being founded on young examples. Gunther, Fish. viii. p. 351.
Chhneera monstrosa. Note on the brain by Miklucho-Maclay, Jena. Zeitschr.
v. 1870, p. 132.
PLAGIOSTOMATA.
GEGENBAUR, C. Ueber das Skelett der Gliedmaassen der Wirbelthiere
im Allgemeinen und der Hintergliedmaassen der
Selachier insbesondere. Jena. Zeitschr. v. 1870, pp. 397-
447, tabb. 15 & 16, and woodcuts. [On the Skeleton of the
limbs of Vertebrates generally, and of the hind limbs of
Selachians especially.]
. Ueber die Modificationen des Skelets der Hindergliedmaassen
bei den Mannchen der Selachier und Chimseren.
Ibid. pp. 448-458, with fig. [On the modifications of the
Skeleton of the hind limbs in the males of Selachians and
Chimseras.]
Dr. GUNTHER has adopted the following arrangement (Fish.
viii. p. 353) :—
Fam. 1. CAECHAEIII*.
Group A. ('AIU'HAIUINA.
First suborder SELACIIOIDEI.
1. Cavchavias (Cuv.), with 46 species, two of which are new, viz. C.
(Ilypopvioii) plai/fairii, from Zanzibar, p. 362; and C. (Prionodon)
brachyurus, from New Zealand.
2. Ilciiiii/a/cus (Blkr.), with 2 species.
3. Location (At. & H.), with 1 species.
4. Caleoccvdo {"S\. & H.), with •"> species.
5. Tha/assovhinus (AI. & II.), with 2 species.
Ii. Calais fC'uv.), with 2 species.
Group B. ZVGJKNIXA.
"• Zygcetm f(„'uv. j, with 5 species.
Group C. MUSIKLIXA.
8. Trie/,,odon (Gthr.), with 1 species.
9. Leptocarehiu-ius (Gthr.), with 1 species.
10. Triads (Af, & II.), with 3 species.
11. Mustclus (Cuv.), with 8 species, one of which is new, M. antarcticus,
p. 3*7.