222 Mr. F. A. Bather on British Fossil Crinoids : 
origin of the anal fin ; apparently no pyloric cgeca. No air- 
bladder. 
Colours in the fresh state, as in spirit, intense black. 
The small luminous organs were not distinguishable through 
the enveloping mucus until after immersion in spirit ; but 
the large postocular organs were very conspicuous, that on 
the right side being bright rose-pink, while that on the left 
side was covered, except round its lower edge, which showed 
as a silvery streak, with deeply pigmented cuticle. 
Total length 4| inches. 
Hah . Vide Station 97. One specimen, which was quite 
dead when brought to the surface. 
The other Physostomes obtained were (23) Gonostoma 
microdon^ Gthr., at Station 101, and (24) Ghauliodus Sloanii , 
Bl. Schn., at Stations 101 and 103. 
The largest Ghauliodus — a female with gravid ovaries — 
measured nearly 9 inches. 
In concluding this paper I should like to express once 
again my deep obligations to my friend Professor J. Wood- 
Mason, of the Indian Museum. 
EXPLANATION OF PLATES VIII. & IX. 
Fig. 1. Tauredophidium llextii, J. 
j Fig. 2. Gobius cometes. 
Fig. 3. Scopelus pyrsobolus, 5 . 
Fig. 4. Brephostoma Carpenten. 
Fig. 5. Ponerodon vast at or. 
Fig. 6. Paroneirodes glomerosus. 
Fig. 7. Tliaumastomias atrox. 
Fig. 8. Callionymus carebares, J . 
XXVII. — British Fossil Crinoids. — III. Thenarocrinus calli- 
pygus, qen . et sp . nov Wenloch Limestone . By F. A. 
Bathek, M.A., F.G.S. 
[Plate X.] 
In pursuance of the intention expressed at the end of Paper I., 
I now enter on the description of the Fistulata from the 
Wenlock Limestone; and the first to be dealt with is an inter- 
esting genus, which has not yet been described, but which 
has been alluded to in Paper II. under the name of Thenaro- 
crinus . 
