ICHTHYOLOGY. 563 



PHYSOSTOMI. 



Duvernoy has published his particular observations on 

 the development of the viviparous Poecilia surinamensis, Val. 

 They are preceded by an historical review of the most 

 important works respecting the development of the fish. A 

 plate with figures is added. (Comptes reudus, vol. xviii, 

 1844, pp. 667, 720; Annales cl. Sc. Nat. 1844, i, p. 313; 

 Froriep's Notiz. xxxii, pp. 1, 17, 33, 49, 65, 81.) 



Cyprinodon orthonotus, Peters (Bericht d. Acad. z. Berlin), from Quelli- 

 mana. Dusky green, with metallic lustre, aureous beneath, a blackish brown 

 spot on the scales. J. Miiller adds the remark that this species, with C. 

 flamdus, are the only species of Cyprinodon at present known. Cyprinodon 

 umbra, on account of the teeth on the vomer and palate, must constitute a 

 distinct genus, Umbra Crameri, Mi'ill. 



(Ib.) a new species, AnaMeps microlepis, is noticed, which presents much 

 smaller scales, seventy in a longitudinal series. Besides some notices re- 

 specting the genera of the family of the Cyprinodoutes, a notice is lastly also 

 given of two new species of the genus Molinesia : M. fastiata, Mull. Trosch. 

 D. 8 ; A. 9, with dark transverse bands, from Mexico, and M. suriuameusis, 

 Mull. Trosch. D. 10 ; A. 10. From Surinam. 



A Synopsis generum et specierum familise Characinorum 

 auct. J. Miiller et F. H. Troschel, has appeared in these 

 Archives, 1844, p. 81, in which 83 species are arranged in 

 32 genera. 



Osteoglossum formosum, Sal. Miiller and Schlegel, (Verhaudeliugen, &c.), 

 differs from 0. bicirrJiosum, Agass., in the smaller dorsal fin, and in the 

 circumstance that the caudal fin is separate from the anal. It is, conse- 

 quently, without doubt a distinct genus. Borneo. 



Saurus trivirgatus, Val. (Cauar.) D. 12; A. 11. Aulopus filifer, Val- 

 (Canar.) The first ray only of the dorsal fin elongated. A. maculatus 

 (id. ib.), none of the rays of the dorsal fin elongated. 



Th. G. Tellkampf has more particularly described and 

 figured in Miiller's Archiv, 1844, p. 381, the blind fish of 

 the Mammoth caverns in Kentucky, Amblyopsis spel&us. 

 It constitutes a peculiar family among the Physostomi 

 abdominales, and is especially distinguished by the position 

 of the anus anterior to the ventral fins, on the throat. It 

 possesses minute eyes covered by the integument. It has 

 no accessory branchiae, no adipose fin, a simple swimming- 

 bladder, a csecal pouch of the stomach, and cseca. 



