214 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Another specimen (Cat. No. 28723, U.S.N.M.) of medium size, 

 nearly mature, was found at Cavite Anchorage, Manila Bay, Luzon, 

 on July 2, 1909. 



Light (1914) states that this is the commonest medusa in Manila 

 Bay in November and December. 



CATOSTYLUS TOWNSENDI Mayer. 



Catostylus townsendi Mayer, 1915, Publication No. 212, Carnegie Institution 

 of Washington, p. 183. 



This species is named in honor of the author's friend, Dr. Charles 

 H. Townsend, the distinguished director of the New York Aquarium. 



Six specimens were found at Sta- 

 tion D5594, September 30, 1909, 

 about 6 miles off Mount Putri, 

 Borneo, in 11 fathoms. Type, Cat. 

 No. 28722, U.S.N.M.; paratypes 

 28721, U.S.N.M. This medusa is 

 closely allied to Catostylus purpurus 

 of Manila Bay, Philippine Islands, 

 but in formalin its exumbrella is 

 milky in color and bespeckled irreg- 

 ularly with numerous conspicuous 

 purple-brown spots. The mouth- 

 arms are more pointed than in 

 G. purpurus. In some octants of 

 the bell-margin the velar lappets 

 are arranged as in G . purpurus, 

 but they are usually more numerous and more irregularly arranged 

 than in G. purpurus. 



The dimensions of the largest specimen of G. townsendi, stated in 

 millimeters, are as follows: Bell 97 wide, flatter than a hemisphere, 

 exumbrella finely granular, gelatinous substance of horny rigidity. 

 Shape and consistency of the bell as in G. purpurus. Eight rhopalia 

 without ocelli, in formalin, and with a deep dark-colored, furrowed, 

 exumbrella pit. 



The rhopalar lappets are small and oval, but the velar lappets are 

 about twice as wide as long. Deep clefts between the lappets extend 

 a short distance up the sides of the exumbrella. The velar lappets 

 are very irregular in arrangement, although they tend to conform to 

 that seen in G. purpurus of Manila Bay, Luzon, yet in most of the 

 octants the subdivisions of the principal lappets are more pronounced 

 and irregular than in G. purpurus, so that there are usually 7 or 8 

 main velar lappets with 10 to 14 marginal lobes in each octant. 



The arm-disk is similar in shape to that of G. purpurus. It is 61 

 mm. in perradial and 45 mm. in interradial diameter. The perradial 



Fig. 16. — Catostylus townsendi from 

 off Point Putri, Borneo. 



