OF THE HYDROMEDUS^E. 373 



upon the presence or absence of blind centripetal canals is inaccurate, as a reference to 

 Haeckel will show. 



The large fig-are at the top of PI. 42, which is a photolithography of a pen drawing- 

 made from nature, is the only figure of Liriope scutigera which has ever been published. 



Liriope scutigera, McCmcbj. 



Liriope scutigera, McCrady, 1857; Gymnophthalmata of Charleston Harbor, p. 10G. 

 Liriope scutigera, L. Agassiz, 1862; Contributions iv, p. 365. 

 Liriope scutigera,, Brooks, 1883; Studies, 11, p. 475. 

 Liriaatha scutigera, Haeckel, 1879; Medusen, p. 287. 

 Xauthea scutigera, Haeckel, 1864; Geryoniden, p. 24. 



Species-Diagnosis. Umbrella, when relaxed in swimming or floating, about half as 

 high as wide : but sub-spherical or almost cubical when violently contracted. Gastric 

 peduncle conical, thick, about as long as diameter of umbrella, gradually diminishing 

 in size from the base to the proximal end, where it terminates in a pointed, tongue-like 

 process, which may be protruded from the mouth, which is quadrate, without lips. Re- 

 productive organs nearly square with rounded corners, extending from near circular 

 tube to top of sub-umbrella, and nearly meeting along the inter-radii. Four perradial 

 flexible, contractile hollow tentacles, three or four times as long as the diameter of the 

 umbrella, and four short stiff in terradial tentacles, which are absent in a few exceptional 

 adults. Eight sensory vesicles, one at the base of each interradial tentacle, and one a short 

 distance from the base of each perradial tentacle. 



Color. By transmitted light, the tip of the proboscis is purple; by reflected light it is 

 green and the ovaries red. 



Si se. About one-third of an inch in diameter. 



Habitat. Abundant all through the summer in Hampton Koads, Virginia; at Beau- 

 fort, ISTorth Carolina, and at Charleston, South Carolina. It is one of the most charac- 

 teristic medusa; of our southern coast. 



Ontogeny. Hypogenesis with metamorphosis. 



Haeckel's diagnosis of the species, which is abstracted from McCrady's account, is in 

 the main correct, but it contains several statements which are not strictly accurate, such 

 as the statement that the umbrella is nearly spherical, that there is no tongue-like process 

 and that the reproductive organs are round. The species is distinguished from Fritz 

 Midler's Liriope catherinensis (Arch. f. Naturges. xxv,p. 310, pi. 11) by the fact that the 

 reproductive organs are nearly square, instead of being elliptical, and by the fact that they 

 reach nearly to the circular tube, while Midler's figures show quite an interval between 

 them and the circular tube. The primary radial tentacles of the young also lack the 

 terminal flagellum or hook which is shown in Midler's figures. 



Haeckel has shown that Agassiz's Liriope scutigera (N. A. Acalephs, p. 60, fig. 87) is 

 quite different from McCrady species, and this is also time of Fewkes' Liriope scutigera, 

 (Studies of the jelly-fishes of ]S"arragansett Bay, Bull. Mus. Comp. Zool., vm, 8, p. 126, 

 PI. 6, figs. 7, 10,11, 1881). There is a lack of agreement between the text and the 



