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 latiqniwsus, and 

 compared with the so-called CfenacantJms ornahis, Ag., while a fourth 

 spine, more slender, is recorded as Homacanihus gracilis. If, how- 

 ever, these fossils be compared with the spines of the Acanthodian 

 Climatius, as elucidated by Egerton * and Powrie f, 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. 

 Climatius — 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. Jeffery Pakker, F.R.S. 



In Mr. Spence Bate's Beport 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. 

 IlUffelii, 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 Becord ' 

 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, pi. viii. 



t J. Powrie, Quart. Journ. Geol. Soc. vol. xx. (1864), pp. 420-423 ; 

 also Trans. Edinb. Geol. Soc. vol. i. (1870), pp. 295-297, pi. xiii. fig. 10, 

 pi. xiv. figs. 11-13. 



X Climatius uncinatus, Powrie. 



