Miscellaneous. 407 



T. Heckeli, ThioUiere, from the French Lithographic Stone in size, 

 the latter are much smaller. 



6. Broivneiclithys ornatns, gen. et sp. nov. — Remains of a small 

 elongated fish, discovered by Mr. Montagu Browne in the Lower 

 Lias of Barrow-on-Soar, pertain to a new generic and specific type, 

 apparently related to the BelonorhynchidfB. The uotochord is per- 

 sistent and the neural and hsemal arches are ossified, but there are 

 no well-developed ribs. The scales are thin, cycloidal, with promi- 

 nent concentric lines of growth, deeply overlapping and externally 

 ornamented with gauoine tubercles. Portions of a dorsal and ven- 

 tral series of very large, narrow, pointed ridge-scales are also 

 observable. The cranial bones are invested with ganoine and are 

 coarsely tuberculated. 



On the Occurrence of tJie Devonian Ganoid Onychodus in Spltzhergen*. 

 By A. Smith Woodward, F.G.S., F.Z.S. 



In the collection of Devonian fossils from Mimes Dal, Spitz- 

 bergen, in the State Museum, Stockholm, kindly shown to the author 

 by Professor Lindstrom, is a small, arched, tooth-bearing bone, 

 undistinguishable from the so-called " intermandibular arch " or 

 " presymphysial bone " of the remarkable Ganoid fish Onychodus. 

 The genus has hitherto been met with only in the Devonian of Ohio 

 and jS^ew York (dewberry, Geol. Surv. Ohio, vol. i. pt. ii. p. 296) 

 and the Lower Old Red Sandstone Passage-beds of Ledbury, England 

 {Onychodus anglicus, A. S. Woodw., Geol. Mag. [3] vol. v. p. 500). 

 The new specimen thus considerably extends the known range of 

 Onycliodiis in space, and, so far as can be ascertained, pertains to a 

 hitherto undetermined specific type. Four fractured teeth are pre- 

 served, scarcely more than half as large as those of the smallest 

 described species, 0. anglicus, and differing from the latter in the 

 very large size of the internal cavity. The form may be provisionally 

 named Onychodus arcticus. 



On the Reproduction of some Ctenostomatous Bryozoa. 

 By M. Henei Peouho. 



The author's observations were made upon three species of Aleyo- 

 nelleans collected at Bauyuls-sur-Mer, namely Alcyonidium cdbidum^ 

 Alder, Alcyonidium duple.v, sp. n.f, and Pherusa tuhulosa, Ell. and 

 Sol. 



In A. alhidum the polypides of the sexual zocecia have, between 

 two tentacles of the anal side, a tubular organ communicatiug with 

 the perivisceral cavity and opening outwards by a small ciliated 

 vestibule. This organ occurs only in a few Bryozoa ; it has been 

 called the intertentacular organ; in A. alhidum it is found only on 



• Abstract of paper read before Section C, British Association, New- 

 castle-upon-Tyne, 1889. 



t A species very nearly allied to A. mytili, Daly., but easily distin- 

 guished by the greater size of its cells, which attain a length of 1 millim. 



