726 MEDUS.E OF THE WORLD. 



Microhydra ryderi (see page 366, Vol. II). 



Microhvdra ryderi, GOETTE, 1908, Mitt, philomath. Gesell., Strassburg, Bd. 4, Jahrg. 16, p. 35, i taf. 



Goette records the finding of this hydroid in the neighborhood of Strassburg.. Hitherto 

 it has been known only from Tacony Creek near Philadelphia. Unfortunately I have not 

 been able to see his paper. 



Genus Limnocnida (see page 370, Vol. II). 



Litnnocnida, GRAVIER, 1908, La Meduse du Tanganyika et du Victoria Nyanza. Sa dispersion en Afrique, Result. Scientifiques 

 voyages en Afrique Edouard Foa, Paris, pp. 601-611. 



Gravier gives an account of the dispersion of this genus in Central Africa. 



jEgina citrea (see page 451, Vol. II). 

 JEgina pt-tttamrra, KISHINOUYE, 1910, Journ. College of Sci., Tokyo, vol. 27, art. 9, p. 32, plate 5, fig. 34. 



This is a 5-rayed JEgina citrea from Misaki and Suruga, Japan, in winter. Vanhoffen, 

 1908, called attention to the frequent occurrence of 5-rayed aberrations of jEginn. Kish- 

 inouye's medusa is about 20 mm. wide and 10 mm. high, with thick gelatinous hell having a 

 flat top and sloping sides. The mouth is a simple round opening and the 10 genital sacs 

 are nearly quadrate. The 5 tentacles are each about twice as long as the bell-radius. Color ( ?) 



SCYPHOMEDUSjE. 

 Carybdea rastonii (see page 508, Vol. III). 



Charybdea mora, KISHINOUYE, 1910, Journ. College of Sci., Univ. of Tokyo, vol. 27, art. 9, p. 6, plate I, figs. 4-9. 



This form from Japan appears lo be identical with C. rastonn of the Pacific. It may 

 possibly be distinguished, however, as a local variety by the large nettling wans over its 

 exumbrella and its relatively long pedalia, these being about two-fifths as long as the height 

 of the umbrella. I have, however, seen specimens of C. rastonii with pedalia one-third as 

 long as the bell-height. 



Carybdea alata (see page 508, Vol. III). 



Tarnova vintlenla, KISHINOUYE, 1910, Journal College of Sci., University Tokyo, vol. 27, art. 9, p. 6, plate l, figs. 4-9. 



This form, from the Inland Sea of Japan, is apparently identical with C. alata. Kish- 

 inouye describes large specimens 100 mm. high and 60 mm. wide. He finds from 6 to 8 

 dendritic velar canals in each quadrant, whereas I have not seen more than 6 in specimens of 

 C. alata. A variation of this sort may be expected, however, in specimens of such great size 

 as those found by Kishinouye. 



Haliclystus octoradiatus (see page 534, Vol. III). 



Halictystus odoradiatus, WIETRZYKOWSKI, 1909, Comptes Rendus Acad. des Sci., Paris, tome 149, p. 746 (development). 



Wietrzykowski gives the best account yet published of the early stages of Haltclystus. 

 The planula is about ii6/< long, iS/< wide. The ectoderm forms a continuous sac of flat, 

 hexagonal cells, apparently without cilia. There are generally about 16 entodermal cells 

 arranged in a single row. After I to 4 days of free lite, the planula; settle down upon 

 their anterior ends and become hemispherical. They are apt to settle down in clusters and 

 feed upon Nuuplius larvae, which they capture by means of their nematocysts. The mouth 

 breaks through by the perforation of the ectodermal sac at the summit of the larva. The 

 larva then gradually becomes vaguely 4-lobed and about 150;". in diameter, and a tentacula- 

 form bud develops at the summit of each of the 4 lobes. These buds become detached and 

 resemble the original planula, which developed from the egg, and go through developmental 

 stages similar to those of the mother-larva, fixing themselves by their anterior ends and in 

 turn giving rise to buds, as did their mother. 



At the time of formation of the primary buds, one sees a well-developed mvagination of a 

 glandular character at the center of the adherent surface of the larva. This is the beginning 

 of the pedal zone. The body then elongates, becoming filiform, and ihen 2 tentacles, 180 

 apart and exactly similar in structure to the knobbed tentacles of the adult, develop on opposite 



