CHONDROPTERYGII. 
. Pisces 9 
lant, t. c. p. 63, pi. ii, fig. 1. C. obscums , n. sp., id. t. c. p. 67, pi. ii, fig. 2, 
Coast of Soudan, 1400 m. 
Echinorhinus spinosus , L., figured by McCoy, Prodr. Zool. Yict. 
pi. cxliv. 
Nemacanthus tuberculatus , n. sp. (foss.), Bassani, Atti Soc. Ital. xxix, 
p. 30 (1886), Trias, Lombardy. 
It. H. Traquair, Geol. Mag. (3) v, pp. 81-86 & 101-104, has notes on 
Carboniferous Selachii : Cladodus, Ag., and Ctenacanthus , A g., p. 81, 
Dicentrodus , n. g., for Cladodus bicnspidatus , Traq., p. 86, Tristy chius, 
Ag., p. 83, Ilelodus , Ag., p. 84, Cochliodontidne, p. 84, Callopristodas ) n. g., 
for Ctcnopty chins pectinatus, Ag.,p. 85, Oracanlhus , Ag., p. 85, and Oracan - 
thus armigerus, n. sp., p. 86, Carboniferous Limestone of Ayrshire, Ano- 
dontacanthus, J. "YY. Davis, and Pleur acanthus, Ag., p. 101, Pristodus 
falcatas , Davis, p. 101, Pristicladodus , McCoy, p. 103, and Chondrenchelys 
problematical n. gg. & spp., p. 103, Eskdale beds. 
13 AT O DEI. 
Ewart, J. C. On the Development of the Electric Organ of Raia 
batis. Phil. Tr. clxxix, pp. 399-409, pis. lxvi &Jxvii j abstract, P. It. 
Soc. xliv, pp. 120 & 121. 
Description of the electric organs found in the Skate genus, with an 
account of the development of the electric organ of Raia batis. 
. On the Structure of the Electric Organ of Raia circular is. Phil. 
Tr. clxxix, pp. 410-416, pi. lxviii ; abstract, P. R. Soc. xliv, 
pp. 213 & 214. 
. The Electric Organ 7 of Raia radiata. Phil. Tr. clxxix, pp. 
539-552, pis. lxxix & lxxx ; abstract, P. R. Soc. xliv, pp. 308-310. 
Burdon Sanderson, J., & Gotcii, F. On the Electrical Organ of the 
Skate. J. Physiol, ix, pp. 137-166, figs. 
Gotcii, F. Further Observations on the Electro-motive Properties of 
the Electrical Organ of Torpedo marmorata. Phil. Tr. clxxix, pp. 
329-363, figs., pis. Ii & lii. 
Bois-Reymond, E. du. Bemerkungen fiber einige neuere Ycrsuche an 
Torpedo. SB. Ak. Berlin, 1888, pp. 531-554. 
Perenyi, J. Beitriige zur Entwickclung der Riickensaite (Chorda 
dorsalis) und der perichordalen Gebilde bei Torpedo marmorata. 
Math. Nat. Ber. Ung. iv, pp. 214-216 (1887), & v, pp. 218-240, 
pis. i-iv. 
F. Hilgendorf, SB. nat. Fr. 1888, pp. 109 & 110, has remarks on the 
histology of the teeth of Prislis. 
Amblypristis cheops, n. g. & sp , for toeth from the Eocene of Egypt, 
apparently allied to Pristis ; Dames, t. c. p. 106, fig. 
Dactylodus rossicus , n. sp. (foss.), A. v. Inostranzeff, Tr. Soc. Nat. 
St. Petersb. xix, Geol. p. 15, pi. — , Chalk, Gov. Olonetz. 
Raia fullonica , L., figured by Vaillant, Exped. Trav. & Talism. 
pi. iv, fig. 1. R. bracliyura , Gthr., noticed and figured by YaieRANT, 
