184 Miscellaneous. 
and furrows, and exhibiting some indications of posterior denticles ; 
no smooth base of insertion is distinguishable, and the variation in 
relative length and breadth in the fossils is very striking. Three of 
the stouter examples figured are named Ctenacanthus latispinosus, and 
compared with the so-called Ctenacanthus ornatus, Ag., while a fourth 
spine, more slender, is recorded as Homacanthus gracilis. If, how- 
ever, these fossils be compared with the spines of the Acanthodian 
Climatius, as elucidated by Egerton * and Powrie+, there will be 
observed to exist the closest agreement in every respect: the shape 
and ornamentation of the spines is similar; posterior denticles are 
known in certain of the spines of at least one Scottish species t; 
and there is no more variation among the Canadian fossils than is 
exhibited in the dermal armature of a single individual of any species. 
Chimatius—or some genus undistinguishable from Climatius by its 
spines—thus occurs in the Lower Devonian of the New World 
exactly as in the Old, and the Canadian species will at present retain 
the provisional name of Climatius latispinosus. 
Note on Palinostus, Spence Bate. 
By Prof. T. Jerrery Parker, F.RS. 
In Mr. Spence Bate’s Report on the Macrura of the ‘ Challenger,’ 
which has just reached me, I find that the author proposes to place 
certain species of Palinurus, viz. P. Lalandii, P. frontalis, and P. 
Hiigelit, in a new genus Palinostus. : 
I should like to point out that this group is precisely equivalent 
to my subgenus Jasus. Nearly six years ago I proposed to restrict 
the name Palinurus to those of the ‘* Langoustes ordinaires” in 
which the rostrum is vestigial and the stridulating organ present, 
and to place those in which the rostrum is well developed and pro- 
vided with “ clasping processes” and in which there is no stridu- 
lating organ in a new subgenus Jasus. This name has therefore 
priority over Palinostus. 
My paper on this subject is contained in the sixteenth volume 
(1883) of. that little-known publication ‘The Transactions of the 
New-Zealand Institute,’ and is referred to in the ‘ Zoological Record ” 
for 1884. 
Dunedin, N. Z., 
May 28, 1889. 
* Sir P. Egerton, “ Figs. and Descrips. Brit. Organic Remains” (Mem. 
Geol. Surv. 1861), dec. x. pp. 65-68, pl. viii. 
+ J. Powrie, Quart. Journ. Geol. Soc. vol. xx. (1864), pp. 420-423 ; 
also Trans. Edinb. Geol. Soc. vol. i. (1870), pp. 295-297, pl. xiii. fig. 10, 
pl. xiv. figs. 11-13. A 
t Climatius uncinatus, Powrie. 
