44 Pisces. 
v. pisces. 
T. Gill, Amer. Natural, xxviii, 1894, p. 582, refutes some statements 
recently made by Ayers on the variation in the number of gills in 
Bdellostoma dombeyi , Lacep. 
Researches in the nervous system of Myxine glutinosa , by A. Sanders. 
(London : 1894, 4to, 44 pp., 8 pis.) 
On the parietal organs of Petromyzon planer i ; Studnicka, SB. Bohmisch. 
Ges. 1893, No. 1, 50 pp., figg., 3 pis. (1894). 
Eycleshymer, in his paper on the development of Ambly stoma, devotes a 
chapter to the epihlast and mesoblast in Petromyzon ; J. Morphol. x, 
1895, pp. 378-381. 
Petromyzon marinus, L. : on young specimens kept in a freshwater 
aquarium ; L. Vieira, Ann. Sci. nat. Porto, ii, 1895, p. 14. P. 
planeri , L. : on its oviposition ; Vejdovsky, SB. Bohmisch. Ges. 
1893, No. 49, 4 pp., pi. xviii (1894). 
Palceospondylus gunni, Traq. : further notes and figures by Traquair, 
P. Phys. Soc. Edinb. xii, 1894, p. 312, pi. ix. 
LEPTOCARDII. 
Miss J. W. Kirkaldy revises the genera and species of B ranch ios to midce ; 
Quart. J. Micr. Sci. xxxvii, 1895, pp. 303-323, pis. xxxiv & xxxv. 
A. Willey brings out a general treatise on the Lancelet, “ Amphioxus 
and the Ancestry of the Vertebrates,” issued as vol. ii of Columbia^ 
University Biological Series. 
On the ontology of Amphioxus ; J. Eismond, Biol. Centralbl. xiv, 1894, 
pp. 353-360, fig. 
On the heart sinuses ; Van Wyiie, Verh. Ak. Amsterdam, 1894, 
pp. 108-115. 
Branchiostoma belcheri, Gray (?) : on specimens from Japan; E. A. 
Andrews, Zool. Anz. xviii, 1895, p. 57. 
Heteropleuron, n. subg., for Branchiostoma bassanum , Gthr., and allies ; 
Kirkaldy, t. c. p. 314. H. cingalense , n. sp., id. t. c. p. 315, Qeylon. 
