40 Pisces 
V. PISCES. 
Sagenodus textilis , n. n. for S. gurleianus, Cope, 1897, nec Cope, 1877. 
Hay, Amer. Natural, xxxiii, p. 786. 
Dijpterus , Sedg. & Murch. (foss.). On a tooth from the Middle Devonian 
of Iowa: J. A. Udden, J. Geol. vii, p. 494, fig.; I), valenciennesi, S. & 
M. On a specimen from the Devonian of Miihlheim on the Rhine: 
Jaekel, Zeitschr. Deutsch. geol. Ges. li, Protok. p. 37; D. contraversus , 
n. n. for D. radiatus, Newberry nec Eichw. Hay, 1. c. 
OSTRACO DERMI. 
Considerations on the relationships and classification of this Subclass: 
Traquair, Tr. R. Soc. Edinb. xxxix, p. 843. 
Pteraspis cornvMca , McCoy. On some new specimens: A. S. Woodward, 
Tr. geol. Soc. Cornwall xii, p. 229. 
Thelodus scoticus and planus, spp. nn., Traquair, t. c. pp. 829 & 831, 
pis. 1, figg. 1-10 & ii, figg. 1-3, Silurian, S. Scotland. 
Lanarkia , g. n., allied to Thelodus, Traquair, t. c. p. 832; L. horrida, 
spinosa , and spinulosa , spp. nn., id. ibid. pp. 832 & 833, pis. iii & iv, 
Silurian, S. Scotland. 
Ateleaspis , g. n., type of a new family ( Ateleaspidce ) of Osteostraci, for 
A. tessdlata, sp. n., Traquair, t. c. p. 834, pi. iv, figg. 6-12, Silurian, 
S. Scotland. 
Anaspida. A new Order, provisionally referred to the Ostracoderms, for 
the new family Birkeniidce, Traquair, t. c. p. 837. 
Birkenia , g. n., for B. elegans, sp. n., Traquair, t. c. p. 837, pi. v, figg. 1-4, 
Silurian, S. Scotland. 
Lasanius, g. n., allied to the preceding. Traquair, t. c. p. 840; L. pro- 
blematicus, and armatus , spp. nn., id. ibid. pp. 841 & 842, pi. v, figg. 
5-13, Silurian, S. Scotland. 
HOLOCEPHALA. 
H. C. Eedeke, Tijdschr. Nederland. Dierk. Yer. (2) vi, pp. 119-127, pi. iv, 
writes on the kidneys of the Holocephali. 
B. Solger, Morphol. Jahrb. xxvii, pp. 322-324, figg., recognises the 
presence of Mauthner’s fibres in the spinal cord of Chimcera. 
Chimcera monstrosa , L. On the egg: Grieg, Bergens Mus. Aarbog 1898, 
No. 3, p. 15, figg. 
ELASMOBBANCHII. 
O. Jaekel, Verb. Deutsch. zool. Ges. 1899, pp. 249-258, figg., and Zeitschr. 
Deutsch. geol. Ges. li, Protok. pp. 56-60, figg., discusses the condition 
of the jaws and pectoral arch in Acanthodes bronni , which he regards 
as proving the origin of both from visceral arches. 
W. G. Ridewood, Anat. Anz. xv, pp. 346-348, figg., remarks on the 
basibranchial skeleton of Echinorliinus spinosus. 
H. F. E. Jungersen, Danish Ingolf-Expedition ii, pt. 2 (88 pp., figg., 
6 pis.), writes on the claspers or copulatory organs of Selachians. 
H. C. Redeke, Tijdschr. Nederland. Dierk. Yer. (2), vi, pp. 127-135, pi. v, 
remarks on anomalous genital organs and egg-capsules in Skates. 
A. N. Sewertzoff, Festschrift C. v. Kupffer, pp. 281-320, figg., pis. xxix- 
xxxi, investigates the development of the skull in A cantinas and 
Pristiurus. 
J. Ruckert, Festschrift C. v. Kupffer, pp. 581-704, figg., pis. lii-lix, has a 
memoir on the early stages in the development of Elasmobranchs. 
