726 MEDUSA OK THK WOHI.D. 



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

 Microhydra ryderi, GocTTE, 1908, Mitt, philomath. Grscll., Strassburg, Bd. 4, Jalirg. 16, p. 35, i taf. 



Coette records the finding of this h\droid in the neighliorhood of Strasshurg. lliilieno 

 it has been known onl\' from Tacony Creek near Philadelphia. Unfortunatel\ I ha\e not 

 been able to see his paper. 



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



Limnocnida, Gravier, 1908, La Mcdusc Ju Tanganyika ct du Victoria Nyanza. Sa dispersion en .Afriquc, Result. Scicntifiqucs 

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



Gravier gives an account of the dispersion of this genus in Central .'\frica. 



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

 Mgina f>eittamera, Kisminovye, 1910, Journ. College of Sci., Tokyo, vol. 27, art. 9, p. 32, plate 5, 6g. 34. 



This is a 5-raved ^gina citrea from Misaki and Suruga, Japan, in winter. V'anhotten. 

 1908, called attention to the frequent occurrence of 5-ra\ed aberrations of Aigina. Kish- 

 inou\e's medusa is about 20 mm. wide and 10 mm. high, with thick gelatinous bell having a 

 flat lop and sloping sides. The mouth is a simple round openmg and the 10 genital sacs 

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



SCYPHOMEDUSiE. 

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

 Charyhdfa moray KisHiNorvE, 1910, Jnurn. College of Sci., Univ. of Tokvo, vol. 27, art. 9, p. 6, plate i, 6gs. 4-9. 



This form from Japan appears to be identical wiih C. raslonii of the Pacific. It may 

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

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

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

 long as the bell-height. 



Carybdea alata (s;e page 508, Vol. III). 



Tamoya tirulenta, Kishinouve, 1910, Journal College of .Sci., I'niversity Tokyo, vol. 27, art. 9, p. 6, plate I, figs. 4-9. 



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

 inouye describes large specimens loo 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 Kishinou)e. 



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

 Haliclyitui ocioradiatui, Wietrzvkowski, 1909, Comptes Rendus Acad, des Sci., Paris, tome 149, p. 746 (development). 



Wietrzvkowski gives the best account yet published of the early stages of Haliclystus. 

 The planula is about ii6/( long, i8/t wide. The ectoderm forms a continuous sac of flat, 

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

 arranged in a single row. .'\fter I to 4 daws of free life, the planulx settle down upon 

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

 leed upon Nauplius larva-, which thev capture by means of their nematocysrs. 1 he mouth 

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

 larva then gradually becomes vagueh' 4-lobed and about 1 50/J^ in diameter, and a lentaciila- 

 lorm bud develops at the summit of each ol the 4 lobes. Ihese 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 f)f the primar\- buds, one sees a well-developed invagination 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 then 2 tentacles, 180° 

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



