224 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



ach. All of the radial-canals extend beyond the ring-canal. The 

 subumbrella exhibits a well-developed system of ring-muscles. There 

 are numerous, prominent, tapering papillae upon the exumbrella. 

 There is a sensory pit on the exumbrella side above each rhopalium, 

 and the floor of the pit exhibits radiating, dendritic furrows. 



Lobonema smithii, the first-known species and type of the genus, was 

 obtained by the Albatross in Manila Bay, Philippine Islands, late in 

 April, 1908. It is named in honor of Dr. Hugh M. Smith, Commis- 

 sioner of Fisheries of the United States. Another species from Pala- 

 wan was described by Light * under the name Lobonema mayeri. 



Lobonema smithii has only eight marginal sense-organs, and the 

 subumbrella ring muscles are entire; while in L. mayeri there are 

 12 to 16 marginal sense organs, and the circular muscles are com- 

 pletely interrupted in the ocular radii. Light, who studied the 

 medusae in life, states that the colors of Lobonema mayeri are an 

 exquisite scheme of purple, violet, and rose pink. The gonads are, as 

 a rule, pink, the general color is violet, and the fringe of tapering 

 marginal lappets purple. Doctor Light tells me that in Lobonema 

 smithii these colors are not so brilliant, and the bell of the medusa 

 may be white. Light finds that the sting of this medusa is not very 

 severe, and that the cases of poisoning reported by Old were prob- 

 ably due to Dactylometra and not to Lobonema. 



Light describes Lobonemoides gracilis, an immature medusa which 

 may possibly be a young stage of Lobonema mayeri. The marginal 

 lappets are pointed but are not very long, and there are no window- 

 like openings in the mouth-arm membranes. 



LOBONEMA SMITHII Mayer. 



Lobonema smithii Mayer, A. G., 1910, Medusae of the World, vol. 3, p. 689, 

 figs. 417, 418. 



The Albatross found this medusa in Manila Bay, Luzon, at the 

 ship's anchorage on April 25, 1908, and again (Cat. No. 28725, 

 U.S.N.M. Type) on the surface at station D. 5222, between Marin- 

 duque and Luzon. 9 miles off San Andreas Island. 



This species is named in honor of Dr. Hugh M. Smith, now 

 United States Fish Commissioner, who found it in Manila Bay, 

 Philippine Islands. The Albatross found a perfect specimen of this 

 medusa, and a quadrant of its disk and all of its mouth arms were 

 preserved. There were also two other imperfect specimens, so that 

 all three taken together afford data for a partial description of the 

 medusa. 



Bell flatter than a hemisphere, 236 mm. across from each sense club 

 to the one 180° from it. Gelatinous substance thick, tough, and rigid. 

 Exumbrella regularly besprinkled with erect, gelatinous papillae 



1 1914, Philippine Journal of Science, vol. 0. p. 217, figs. 7-9. 



