I \'2 l.oLIOO. 



A. Biiccal membrane with *<Tcn. projections, the margins of which are 

 usually armed with suckers. 



* Shell pennate, wings with convex margins. 



L. BREVIPINNA, Lesueur. PI. f>l. ligs. 128-130. 



Tin 1 very narrow tins form the principal character of this 

 species; hut I have seen specimens which apparently connect it 

 with L. Pealii* Lesueur. It is considered by several good 

 authorities to = L. brevis. BL, but that species is much more 

 closi-ly allied to the typical L. Pealii. If the whole group of 

 . \nierican species be united into one. L. Pealii will have priority 

 over all other names. L. brer ipi nna is common on the southern 

 Atlantic coast of the Tinted States. It has been captured as 

 far north as Delaware Bay. 



L. HKMIPTKRA. Howell. PI. f > 1 . figs. 1 81 . 182. 



Tin- type specimen is small and exhibits various evidences of 

 juvenility. There is a difference of form in the Radius, and it 

 may be distinct from the above. Howell says that it is not 

 found north of the coral reefs. 



Florida Gulf of Mexico. 



L. BBEVI8, Hlaiiiv. PI. ;>2. figs. 148. 144. 



Distinguished by its short, nearly rounded tins. The figure 

 represents a typical individual, and it appears to have better 

 developed tins than L. hn'rif,-lni)(i. and to differ from L. Pi-alii 

 by these being rounded in outline instead of rhomboidal; but I 

 have examined specimens in which the form of lins is inter- 

 mediate, so that it is very difficult to place them. 



Brazil. 



L. PKALII. Lcsneur. PI. f>l. figs. 188-140. 



The lins in typical forms are rounded rhomboidal. well devel- 

 oped ; the body is rather short, stout; the skin is beautifully 

 punctate with close red spots which are crowded along the back. 

 Tin- curious dentition of the cups of the sessile and tentacular 

 arms is shown by our figures. Verrill has figured the develop- 

 ment of this species in Ilcport of U. S. Fish Commissioner for 

 1878. He Baya that numbers of the free-swim mini:- young of 

 this species were often found in the stomach of the red jelly-fish. 



