222 Mr. F. A. Bather on British Fossil Crinoids : 



origin of the anal fin j apparently no pyloric ca^ca. 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 brigiit rose-pink, while that on the left 

 side was covered, except round its lower edge, which showeJ 

 as a silvery streak, with deeply pigmented cuticle. 



Total length 4| inches. 



llah. Vide Station 97. One specimen, which was quite 

 dead wlicn brought to the surface. 



The other Physostomes obtained were (23) Gonostoma 

 microdon, Gthr., at Station 101, and (24) Chauliodus Sloanii, 

 Bl. Schn., at Stations 101 and 103. 



The largest Chauliodus — 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 ^"III. & IX. 



Fig. 1. Tmiredophidium Hextii, $. 

 Fi(/. 2. Gobi'us cometes. 

 Fiy. 3. Scope/us pi/rsoboliis, $ . 

 Fif/. 4. Brephostonta Carpenteri. 

 Fiff. 5. Ponerodon vasfatur, 

 Fi(j. 6. Paroneirvdes glomerosiis. 

 Fig. 7. Thmimastomias atrox. 

 Fig. 8. Callionymu3 carebares, 5 . 



XXVII. — British Fossil Crinoids. — III. Thenarocriims calli- 

 pygus, gen. et sp. nov.j Wenlock Limestone. By F. A. 

 Batiiek, 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 alkuled to in Paper 11. under the name of Thcnaro- 

 crinus. 



