ZOOLOGY. 609 



Chqyeida'. — Chatoessus (2 si).), Chi])ea (several sp.), Brishania (1 sp.), 

 Megalops (1 sp.). 

 Murcenidce. — Anguilla (2 sp.)- 



. — Ceratodus (2 sp.). 



. — Ompax (1 sp.). 



Petroniyzontidce. — Geotria (3 sp.) ; Yarra (1 sp.). 



The most noteworthy facts shown by this list are (1) the paucity of 

 specialized fresh-water types, and (2) the affinity of the majority of the 

 forms to marine types. The only known special fresh-water families 

 are five — the Gadopsids, the Haplochitonids, the Galaxiids, the Osteo- 

 glossids, and the Ceratodontids — and each of these is represented by 

 only one or two species, except the Galaxiids, of which 17 have been 

 found. One Galaxiid, at least, occurs in the high mountainous streams. 

 The affinities of most of the peculiar genera are quite uncertain. It is, 

 however, almost certain that none of the species belong to the same 

 families as the Korthern Perches (Percids) and Black Bass (Grystina or 

 Ceutrarchids). Although some of the forms enumerated may be re- 

 garded as anadromous or simply excursionists from the sea, many, al- 

 though very closely related to sea-fishes, have evidently become true 

 fresh-water forms. For example, in a collection later obtained by Mr. 

 Macleay from " the head- waters of Palmer Kiver, cut off by numerous 

 falls from the lower part of the river," were species of Thercqjon, Ele- 

 otris, Aristccus, Synaptura, ISfeosilurus, and Chatoessiis. These are there- 

 fore claimed to be " fresh-water fishes in the strictest sense of the term." 

 (Proc. Linn. Soc. N. S. Wales, v. 7, p. 69 ; see also v. 3, pp. 15, 41, 140.) 



Lest it may be deemed that there is an incongruity between the state- 

 ment that there are only five fresli-water family types of Australian 

 fishes and the family types indicated, it will be pertinent to add that 

 the so-called Cyprinidse are evidently not members of that family, and 

 " Ompax^^ is only known from a figure drawn from memory by a person 

 without any knowledge of ichthyology. 



CLASS OF LEPTOCARDIANS. 



Rohon (Jos. Vict.)- Untersuclinugen iiber Amphioxus lanceolatus. Ein Beitrag zur 

 vergleichenden Anatomic der Wirbelthiere. Denkschr. d. math.-nat. CI. Akad. 

 Wien, 45. Bd. (64 pp.) 



CLASS OF MYZONTS. 



Dohrn (Anton). Stndien zur Urgeschiclitedes Wirbelthierkorpers. III. Die Enste- 



hung der Hypophysis bei Petromyzou Planeri. Mittbeil. Zool, Station zii Nea- 



pel, 4. Bd., pp. 172-189, pi. 18. 

 . Die Entstehung der Hypophysis bei Petromyzon PJaneri. Zool. Anz., 5. 



Jahrg., pp. 587-588. (Nature, v. 27, p. 91.) 

 Eohon (Jos. Vict.). Ueber den Ursprung des Nerviis acusticus bei Petromyzonten. 



Mit. 2Taf. Sitzgsber. Wien. Akad., Math.-nat CI., 1. Abth. 85. Bd., pp. 245-267. 



Development of the pituitary body of the Lampreys. 



The pituitary body or hypophysis, it has been claimed by Dr. W. 

 B. Scott, originates in a very peculiar manner in the Lamprey; but 

 H. Mis. 26 39 



