Miscellaneous. 407 
T. Heckeli, Thiolliére, from the French Lithographic Stone in size, 
the latter are much smaller. 
6. Browneichthys ornatus, 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 Belonorhynchide. The notochord is per- 
sistent and the neural and hemal 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 ganoine 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 the Devonian Ganoid Onychodus in Spitzbergen*. 
By A. Surra Woopwarp, 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 New York (Newberry, Geol. Surv. Ohio, vol. i. pt. ii. p. 296) 
and the Lower Old Red Sandstone Passage-beds of Ledbury, England 
(Onychodus anglicus, A. 8. Woodw., Geol. Mag. [3] vol. v. p. 500). 
The new specimen thus considerably extends the known range of 
Onychodus 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, O. 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. Henri Provuo. 
The author's observations were made upon three species of Alcyo- 
nelleans collected at Bauyuls-sur-Mer, namely Aleyonidium albidum, 
Alder, Aleyonidium duplex, sp. n.7, and Pherusa tubulosa, Ell. and 
Sol. 
In A. albidum the polypides of the sexual zocecia have, between 
two tentacles of the anal side, a tubular organ communicating 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 zntertentacular organ; in A. albidum it is found only on 
* Abstract of paper read before Section C, British Association, New- 
castle-upon-Tyne, 1889. 
tA ed very nearly allied to A. mytili, Daly., but easily distin- 
guished by the greater size of its cells, which attain a length of J millim. 
