130 TRANSACTIONS OF THE WAGNER FREE 



spine (barely more than one-third in /. laciistris); caudal fin deeply forked, 

 the two lobes nearly equal, with a slight advantage in favor of the upper 

 one. Color above, and largely over the sides, black or bluish-black, 

 yellowish or cream-white on the under surface; one pair of inferior 

 barbels white. 



Total length, 21 inches. 



Found in Lake Okeechobee. 



Aplysia Willooxi, nov. sp. PI. 19. 



I would propose this name for a species of Aplysia which is probably 

 fairly abundant in some of the western shallows, although we only met 

 with it in Little Gasparilla Bay. The animal, in its general characters, 

 appears to be most closely related to the Enropean A. dcpilans (Icporina), 

 with which it may have been heretofore confounded, but differs in several 

 well-marked points of structure, notably in color, the position of the 

 buccal aperture, and in the characters of the pore connecting with the 

 shell cavity. While in A. dcpilans, as described by Rang in his mono- 

 graph of the Aplysia group (Histoire Natnrcllc dcs Aplysicns, Paris, 1828), 

 the mouth is placed beneath the tentacular lobes /. e., the latter are 

 superior, in the Florida species it is central with regard to those organs, 

 the lobes being circtimferentially connate, and completely encircling the 

 aperture. The pore leading to the shell-sac is minute, and raised on a 

 small papilla; the stellate markings radiating from the base of the 

 papilla are very feeble, and can barely be discerned without close exam- 

 ination. The shell, which is about two inches in length, is horny- 

 calcareous, deeply emarginate, and striated longitudinally and transversely. 

 General color of the animal sea-green, tinged with purple, and irregularly 

 blotched and speckled with spots of lighter color. Length, / to 8 inches. 

 The animal emits a brilliant crimson fluid. 



Found on a grass-bank, at a depth of about 2 to 3 feet, and also floating 

 on the free surface of the water. 



