NATURAL SCIENCES OF PHILADELPHIA. 21 



American U. anoplos of Cuvier. Astroscopus differs from Uranos- 

 copus by a less completely armed head, and by the absence of an exsertile 

 filament to the membrane behind the symphisis of the lower joint. To this 

 genus is also to be referred the Uranoscopos y-graecum of Cuvier and Val- 

 enciennes. 



9 Astroscopus anoplos Brev. Syn. Uranoscopus anoplos Cuv. and Val. 

 Hist. Nat. des. Poissons, vol. viii, p. 493. 



(Lepisoma cirrhosum Dekay.*) This fish, described as a new genus of 

 the family of Percoids, is the common Chinus pectinifer of Valen- 

 ciennes,! a West Indian species, which is the type of the genus Labrosomus 

 of Swainson. J 



Leptoblennius Gill. 



This genus is founded on the Blennius serpentinus of Dr. D. H. Storer. 

 It differs widely from Blennius by the elongated form of the body, the shape 

 of the head, absence of superciliary tentacles, &c. It is equally distinct from 

 the genus P h o li s . 



10. Leptoblennius serpentinus Gill. Syn. Blennius serpentinus 

 Storer, Hist, of the Fishes of Mass., p. 91, pi. xvii. fig. 1. 



MOLACANTHUS Sw. 



The genus called by Dekay Acanthosorna had been previously named 

 by Swainson Molacanthus, and that appellation has been accepted by the 

 Prince of Canino.|| Swainson founded his genus on the Diodon mola of 

 Pallas, a species to which Dekay has referred in his remarks on Acanthosorna 

 carinatum. 



1 1. Molacanthus carinatus Gill. Syn. Acanthosorna carinatum Dekay, 

 Zoology of New York Fishes, p. 350, pi. 4, fig. 179. 



Dr. Richardson has figured in the Ichthyology of the Voyage of the Sulphur,^ 

 a species of molacanthus, which he has named Orthagoriscus s p i n o s u s 

 Cuv., citing for that name the Regne Animal, vol. i. p. 370. On reference to 

 the volume of Cuvier, it will be seen that the name of Orthogoriscus s p i n o s u s 

 is attributed to Bloch of Schneider; in a foot note to the genns enumerating 

 the species, it is again referred to as Orthogoriscus h i s p i d u s . The latter is 

 the name given to the species in the Systema Ichthyologist,** and the former was 

 probably due to an oversight of Cuvier. The species of Richardson is also, 

 perhaps, a distinct species from the Molacanthus hispid us Bon., and is an 

 inhabitant of the Chinese seas. 



On the Pertinence of the ALOSA TERES Dekay, to the Genus DUSSUMIERA Val. 



BY THEO. GILL. 



In the ichthyological volume of " Zoology of New York,f f " Dr. Dekay has 

 described a halecoid fish to which he has given the name of Alosa teres. He 

 has characterized the genus Alosa as having the characters of Clupea 

 (body compressed,) but distinguished by the tongue and the roof of the mouth 

 being smooth or edentulous. Notwithstanding this definition, he has without 



* Dekay, loc cit., p. 41, pi. 30, fig. 91. 



tCuv. Val. Hist. Nat. kes Poisons, vol. xi. 



X Swainson, Nat Hist, of Fishes, &c, vol. ii, pp. 75 and 277, 1839. 



I Swainson, Nat. Hist, of Fishes, Amphibians and Reptiles, vol. ii. p. 329. 



|| Bonaparte, Catalogo Metodico dei Pesci Europei, p. 87. 



IfRichardson, loc. cit., p. 125, pi. 2, figs. 10 and 11. 



**B1. Schn., loc. cit , p. 511. 



tt Zoology of New York Fishes, p. 262, pi. 40, fig. 128. 



I860.] 



