37. CLUPEID.E - SPRATELLOIDES. 263 



remain there permanently. The current genera are ill denned and 

 apparently too numerous, and we have followed Dr. Giinther in refer- 

 ring most of them to Clupea. The rudimentary teeth are extremely 

 variable, even in the same species. 



groups Clupeina and Diismiiiieruna Giinther, vii, 412-467.) 



* Belly roimtled, covered with ordinary scales ; supplemental bones of maxillary very 



narrow. (Dussumieriina'.') 



a. Veutrals small, behind dorsal ; teeth small, persistent on jaws, vomer, palatines, 

 pterygoids, and tongue .................................. ETRUMEUS, 120. 



aa. Veutrals below dorsal; teeth wanting or deciduous ....... SPRATELLOIDES, 121. 



** Belly compressed, armed with bony serrte ; supplemental bones of maxillary broad. 



(Clupeince.) 



I). Scales with their posterior margins entire and rounded. 

 c. Last ray of dorsal not produced. 

 d. Scales thin, deciduous ..................................... CLUPEA, 122. 



dd. Scales firm, adherent, regularly arranged .............. HARENGULA, 123. 



cc. Last ray of dorsal produced in a long filament .......... OPISTHONEMA, 124. 



bb. Scales with their posterior margins vertical, and pectinate or fluted. 



BREVOORTIA, 125. 



120. ETRUMEUS Bleeker. 

 Round Herrings. 



(Bloeker, Verh. Bat. Gen. xxv, Japan, 48: type Clupea micropus Schlegel, from Japan.) 

 Body elongate, fusiform, sub cylindrical, snout pointed. Mouth ter- 

 minal, rather wide, the maxillary extending to opposite the eye, its sup- 

 plemental pieces slender; jaws and most of the bones of the mouth 

 with small but permanent teeth. Scales cycloid, entire, very decidu- 

 ous. Branchiostegals fine, about 15 in number. Pyloric coeca numer- 

 ous. Belly rounded, covered with ordinary scales. Fins all small, 

 the anal especially so. Veutrals behind dorsal. Two species known. 

 abdomen; o>.o?, even?) 



437. E. teres (DeKay) Giiuther. Hound Herring. 



Olivaceous above, silvery on sides and below. Body terete and fusi- 

 form. Head slightly compressed forwards. Mouth small, maxillary 

 reaching front of orbit. Eye large, equal to snout. Fins all very small. 

 Vomeriue teeth present. Head 4 in length; depth 6. D. i:>; A. 10. 

 Atlantic coast of the United States; not common. 



(Alosa teres DeKay, New York Fauna, Fish. 1842, 262; Gunther, vi, 467.) 



191. PRAirElE,OII>ES Bleeker. 

 (Bleeker, Verh. Bat. Gen. xxiv, Hariug, 29: type Clupea argyrotwnia Bleeker.) 



Body elongate, subcyliudrical or slightly compressed, covered with 

 moderate-sized deciduous scales. Abdomen obtuse, without keel or 



