Chap. HI. 



GENUS BOLINA. 



269 



Fig. 94. 



Fig. 93. 



BOLIXA ALATA, Ag. 



(Seen from the broad side.) 



a and / Long rows of locomotive flappers. — 



g and k Short rows of locomotive flappers. 



— a Central black speck (eye-speck). — 

 i to m Triangular digestive cavity. — i to o 

 Funnel-like prolongation of the main cav 

 ity, — V Chymiferous tube of the tenta 

 cular apparatus. — tn Tentacular appa- 

 ratus on the side of the mouth. — rr Ear- 

 like lobes, or auricles, in the prolongation 

 of the short rows of locomotive flappers 



— tt Prolongation of the vertical chymife- 

 rous tubes. — n n The same tubes turning 

 upwards. — XX Bend of the same tubes. 



— zz Extremity of the same tubes meet- 

 ing with those of the opposite side. — to 

 Recurrent tube anastomozing with those 

 of the auricles. 



BOLINA VITREA, Ag. 



I' U long ambulacra. — ri l^ short 

 ambulacra. — / funnel. — d diges- 

 tive cavity.— f tentacular tube. 

 — yi X^ auricles. — I I anterior 

 and posterior lobes. — 10- tenta- 



of colors is so faint as scarcely to be noticed. I have not been able to make 

 a thorough study of tliis species, and therefore limit myself to calling the attention 

 of naturalists to its occurrence on 

 the shores of the coral reef of Flor- 

 ida. F/ff. 93 gives an outline view 

 of this species; and a comparison with 

 Fiff. 94, which represents the northern 

 Bolina alata in the same position, 

 may show their specific difference. 



Mnemiopsis Garden: A(/. "While 

 residing upon Sullivan's Island, near 

 Charleston, South Carolina, I occasion- 

 ally caught, during the winter, about 



, cie. 



the breakwater near the Fort, speci- 

 mens of a species of Acaleph somewhat resembling Bolina, 

 but evidently constituting a distinct genus, which I pro- 

 pose to call Mnemiopsis, on account of its still greater 

 resemblance to Mnemia. It is at once distinguished by 

 the deep furrow separating the anterior and posterior 

 lobes from the lateral spheromeres, a character by which 

 the BoHnidas are readily separated from the Mnemiida) proper. The generic pecu- 

 liarity of Mnemiopsis consists in the great development of the auricles, and in the 

 prolongation of the locomotive flappers to the actinal margin of the large lobes, so 

 that the rows of locomotive combs are visible from the actinal side, as well as 

 Fij. 95. from the abactinal side, of the body. 



Fiffs. 95 and 96 represent, m the size of 

 life, the only species I know of this 

 genus. I have called it Mnemiopsis 

 Gardeni in memory of Dr. Garden, a 

 distinguished naturaHst of Charleston, con- 

 temporary of Linnaeus and friend and 

 correspondent of the great Swedish natu- 

 ralist, to Avhom science is indebted for 

 the knowledge of the large number of 

 the North American animals enumerated 

 in the "Systema Naturce." This species is very transparent, hyaline, of a mUkish 

 white tint, with grayish ambulacra, faintly iridescent. Whether it is identical with 

 the species mentioned by McCrady as Bolina Uttoralis or not, I have at present no 

 means of ascertainins;. 



Fig. 96. 



Mnemiopsis Gakdeni, Ag. 

 P t! long ambulacra. — fl i8 short 

 ambulacra. — / funnel. — a folds 

 of the digestive cavity. — d di- 

 gestivecavity. — t tentacular tube. 

 — /(I tentacle. — ^^ ^^ auricles. — 

 1 1 anterior and posterior lobes. 



Mnemiopsis Gap.deni, Ag. 

 mouth. — /ii A2 tentacles. — il Z8, 

 l^ i^ lateral ambulacra. — X^ X^^ 

 y5 Y* auricles. — II anterior and 

 posterior lobes. — ^2 /a^ /7 ;ij anterior 

 and posterior ambulacra. 



