258 BULLETIN : MUSEUM OF COiMPARATIVE ZOOLOGY. 



ing Maas and Metschnikoff (Arb. Zo5l. Inst., Vienna, vol. 6), widens to in- 

 clude all Geryonidae with four radial canals. He thus includes Haeckel'a 

 genera Glossocodon and Glossoconus (Haeckel, System der Medusen, 1879), of 

 which the distinctive character, the presence in the adult state of blind centri- 

 petal canals, has been shown by Maas to be a developmental feature of little 

 systematic importance. Although knowledge of the young stages of most 

 species of Liriojje is entirely lacking, or very fragmentary, Maas, writing of the 

 collections of the Plankton Expedition (Craspedoten Medusen der Plankton 

 Ex. 18), was able to say: " Of all the material of the expedition, no single 

 species of the Geryonidae can be named, of which it can safely be said that it 

 has no centripetal canals." 



Our catch included two species of Liriope, both of which appear to be new. 



Liriope indica, sp. nov. 



Plate 5, Figs. 17, 18. 



This species is one of the medium-sized members of the genus, measuring in 

 diameter fourteen mm., and in height about nine. The outline of the bell 

 is almost an exact segment of a circle (Plate 5, Fig. 17), and the gelatinous 

 substance is of medium thickness, thus agreeing well with Vanhdffen'a 

 statement that the thickness of the gelatinous walls of members of this genus 

 correspond in general to their size. The eight permanent tentacles are very 

 unequal ; the four opposite the radial canals are hollow, flexible, ringed with 

 nettle cells, about as long as the bell diameter. Although they are moved 

 actively, they seem only very slightly contractile, so that their "length varies 

 but little. Alternating with them are four others, only about one fourth as 

 long, which are solid, stiff, and curved outwards. Their centripetal surfaces 

 are set with ridges of nettle cells, which extend around about one half the cir- 

 cumference of the tentacle. The ring canal does not give rise to any blind 

 canals, but opposite each of the short tentacles it becomes abruptly broader, 

 forming a triangular spur (Plate 5, Fig. 18). The peduncle is nearly cylindri- 

 cal, about as long as the bell is high, and hangs far below the bell ojiening. 

 The stomach is one third as long as the peduncle, and does not bear a stoma- 

 tostyle. The mouth is a simple, square opening, without lips. The gonads, 

 which occupy nearly the whole length of the radial canals, are shield-shaped, 

 and so broad that they occupy one third of the surface of the subumbrella. 

 The eight otocysts are borne one at the base of each tentacle. Their position, 

 however, differs : the ones corresponding to the short tentacles occurring 

 directly above them, while the four connected with the long tentacles are at 

 one side (Plate 5, Fig. 17). The Medusa is perfectly transparent and color- 

 less, except that the gonads are opaque yellowish, and the nettle knots on the 

 short tentacles reddish brown. 



Four specimens, January 2, in Suvadiva atoll, near Dandu island, surface. 

 This Medusa in several respects resembles the Liriope hyalina of Agassiz and 



