02 ON SEVERAL NEW SPECIES 



vered by a folded sphincter, which is furnished with 

 six very short appendices, hardly surpassing the 

 folded membrane of the mouth ; bone very narrow, 

 corneous, feeble, transparent, enlarged a little ante- 

 riorly, gradually diminishing, cylindrical, and ter- 

 minated by a small hollow cone posteriorly, mar- 

 gined each side by two strong lines, in the middle 

 by a single line ; color violet-blue, passing into pur- 

 pleish on the back, head and tail ; a narrow, longi- 

 tudinal, yellowish band on each side of the back ; 

 sides of a pale blue ; beneath white ; brown points 

 disseminated over all the body, but more numerous 

 above, 



2. L. *Pealeii. This species, which appertains to 

 the fine collection of the Philadelphia Museum, was 

 politely confided to my care, for examination, by the 

 manager of that interesting and superb establishment 

 Mr. R. Peale. It appears to me, not referible to 

 any of the species figured by Seba, nor of those pub- 

 lished by Montfort. 



The sac is solid, firm, cylindrical, gradually at- 

 tenuated to a point, and furnished with a flat appen- 

 diee anteriorly ; fin terminal, more than half as long 

 as the body, united in a point posteriorly, lateral 

 angles rounded, lateral and posterior sides thickened, 

 anterior side thin, surface with transverse striae, 

 formed by small muscles ; head small, compressed, 

 with a small transverse membrane each side below 

 the eyes 5 neck small, short 5 eyes covered by a mem- 



