222 Mr. F. A. Batlier on British Fossil Grinoids : 



origin of the anal fin ; apparently no pyloric ca3ca. 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 briglit 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 {2'^) Gonostoma 

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

 Bl. Schn., at Stations 101 and 103. 



The largest Chaidiodus — 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.l. Taurechqjhidium Hextii, §. 

 Fig. 2. Gobiiis cometei^. 

 Fig. 3. Scopelus pyrsoboliis, 5 . 

 Fig. 4. Brephostoma Carpenten. 

 Fig. 5. Ponerodon vastator. 

 Fig. 6. Paroncirudes glomerosus. 

 Fig. 7. Thaitmastomins atrox. 

 Fig. 8. Callionymus carebares, J . 



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

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

 Bather, 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. 



