A CANT ItOPTE RYG1 1. 
Pisces 17 
lamella) of tho disk wero formed by the bases of the spinous rays, and 
that the spines proper were gradually reduced in size until disappearance; 
and that the disk was formed on the dorsal region, and then gradually 
shifted to its actual position. Remarks are made on Echeneis glaronensis , 
Wettst. (foss.), which probably represents an ancestral form of the living 
types. 
Placate , Cuv. T. Gill, P. U. S. Nat. Mus. x, pp. 612-614, defines the 
character of his family Elacatidcc, the affinity of which to the Echeneididce 
is stated to be purely imaginary. E. Canada , L., external characters and 
skull figured, pi. xxxix. 
Albacora , n. n. for Thynnus , Cuv., nec Fabr., and Qenno , n. n. for 
Orcynus, Cuv., nec Raf. ; Jordan, P. Ac. Philad. 1888, p. 180, and Ann. 
N. H. (6) ii, p. 356. 
Dictyodus. Ow. (foss.), belongs to the Scombridce ; Dollo & Storms, 
Zool. Anz. xi, p. 265. 
Scomberodon, Van. Ben., = Cybiiim , iid. t. c. p. 267. 
Cybium commersonii , Lac., figured by McCoy, Prodr. Zool. Viet, 
pi. cliv : on a Sicilian specimen ; Doderlein, Nat. Sicil. vii, pp. 105 
& 129. 
Pelamys schlegeli, n. sp., McCoy, op. cit. pi. civ, Port Philip Bay. 
Trachinid^i. 
W. N. Parker, P. Z. S. 1888, pp. 859-367, figs., pi. xvii, describes the 
poison-organs of Trachinus ; also Anat. Anz. iii, pp. 468-470 & 873. 
J. ClllEVITZ, Anat. Anz. iii, p. 787, observes that Schmidt, in 1874, has 
also mentioned and described the poison-organs of Trachinus. 
Trachinus draco , L., and T. vipera t C. & V., are distinct species ; Day, 
Ann. N. H. (6) i, p. 351 . 
Percis cylindrical n. sp., id ., P. Z. S. 1888, p. 260, Andaman Is. 
Cottoperca rosenbergii , Stdr., noticed and figured by Vaillant, Miss. 
Cap Horn, Poiss. p. 28, pi. iv, fig. 1. 
Opisthognathus muscatensis, n. sp., Boulenger, P. Z. S. 1887, p. 662, 
pi. liv, fig. 1, Muscat, Arabia. 
Notothenia macrocephala , Gthr., figured by Vaillant, Miss. Cap Horn, 
Poiss. pi. iii, fig. 2. 
IccsrEiDJJ. 
Acrotus , n. g., near Icosteus , Lock., but differing in the absence of 
ventrals and spiny tubercles along the lateral line and in having an 
emarginate caudal. A. willoughbyi , n. sp., Bean, P. U. S. Nat. Mus. x, 
p. 631, Washington Territory. 
Batrachid^. 
Marcgravia, n. g., for Batrachus cryptocentrus, C. & V., grunniens, L., 
and allied species without foramen in the axil ; Jordan, P. U. S. Nat. “ 
Mus. ix, 1886, p. 546. [Omitted from Zool. Rec. xxiii.] 
