8 Pisces. 
riscES. 
Scaphirrhynchus. A third species (S. kaufmanni, sp. n.) of this interest- 
ing genus was made known in 1875 by Bogdanov in a work printed 
in Russian, entitled “ Sketches of Nature in the Oasis of Khiva, and 
noticed further by Kessler in Aralo-Oaspian Expedition, iv. p. 194. It 
has been found at present only in the Amu-Daria, and does not occur in 
the Aral Sea as far as is yet known. A fourth species, named S. her- 
manni by Severtzoff, is now described by Kessler for the first time, 
^ op. cit. p. 190, Amu-Daria, Khiva. Both species are figured, figs. 25 & 26. 
/ Polyodon {Psephurus) gladius. Martens, figured by E. von Martens, 
Preuss. Exped. Ost-Asien, i. 2te Halfte, pi. xv. fig. 1. 
OHONDROPTERYGII. 
Balfour, J. On the Development of Elasmobranch Fishes. J. Anat. 
Phys. xi. pp. 128-172, pis. v. & vi.,pp. 406-490, pis. xv.-xix., 
pp. 674-706, pis. xxiv. & xxv. (continued from x. p. 688). 
Holocephala. 
j Hubrecht, a. Notiz fiber einige Uutersuchungen am Kopfskelet der 
> Holocephalen. Morph. JB. iii. pp. 280-282. 
-J Wilder, B. On the Brain of Chimwra monstrosa. P. Ac. Philad. 1877, 
pp. 219-250, pi. i. 
Chimeera plumhea, sp. n.. Gill, Bull. Phil. Soc. Washington, see 
Ann. N. H. (5) i. p. 183 ; La Have Bank, lat. 42<^ 40' N., long. 
62‘>23'W. 
Plagiostomata. 
j 0 ARMAN, S. On the Pelvis and External Sexual Organs of Selachians, 
\ with special reference to the new genera Potamotryyon and Disceus. 
V P. Best. Soc, xix. pp. 197-214. 
Selachoidei. 
Carcharias munzingeri, sp. n., Kossmann & Rauber, Reise Roth. M. 
p. 31, Red Sea. 
J^ulamia nicaraguensis, sp. n., Gill & Bransford, P. Ac. Philad. 1877, 
p. 190, Lake Nicaragua. 
Mustelus mento, sp. n.. Cope, P. Am. Phil. Soc. xvii. p. 47, Peru. 
Sdache maxima. Du Bocage (Les fanons branchiaux du Squale 
P^lerin, J. Sc. Lisb. 1877, pp. 71-73, and Nature, xvi. p. 61) claims 
the priority of accurately describing these organs for F. Brito-Capello 
[see Zool. Rec. vi.], as anterior to Steenstrnp [see Zool. Rec. x. p. 105]. 
G. Allmann, Nature, xiv. p. 368, writes that he described the pectinated 
appendages more than thirty years ago. Referring to a description of 
the ‘ Basking Shark ’ with figures by E. P. Wright, Nature, xiv. p. 31.3, 
E. H. Giglioli writes, 1. c. xv. p. 273, calling attention to P. Pavesi’s 
memoir [see Zool. Rec. xii. p. 109]. Further letter from E. P. Wright 
