34 Bulletin, Vanderbilt Marine Museum, Vol. IV 



Material examined: One specimen, measuring 26 mm. bell diam- 

 eter, collected 10 miles S. by E. of Monaco Harbor, Mediterranean 

 Sea, April 19, 1923. 



Color: The bell is transparent, colorless, except that the tentacles 

 and gonads are milky ; the concretions are garnet-red. 



Technical description: A small species, with bell diameter of 

 20 to 30 mm. The bell is flat, lenticular, with the central region a 

 biconvex lens, thick in the center, while the bell collar is thin, flexible, 

 contractile ; over the collar region the exumbrella is beset with numer- 

 ous prickle-like tubercles and flat, discoidal, wart-like nematocysts. 

 There are 12 to 14 marginal lappets, with the same number of tenta- 

 cles alternating the lappets. Each lappet is subrectangular, about one 

 and one-half times as long as wide, the free margin a little rounded 

 at the corners; there are five to eight sensory clubs on the margin of 

 each lappet; each club is short, distally dilated, with a cup-like con- 

 cavity within its outer end and filled with a vesicle containing a 

 spherical concretion. There are sensory filaments on the outer half 

 of the club. The velum is broad, with strong circular muscles. The 

 tentacles are each nearly as long as the bell diameter, tapered distally 

 and rather stiff, usually bending only near the base. The central 

 stomach is large with a usually gaping circular aperture; the mar- 

 ginal stomach pouches are wide pentagonal, their outer angles extend- 

 ing under the base of the tentacles. There is no marginal canal sys- 

 tem present. The gonads are situated over the subumbrella ectoderm 

 of the stomach and its pouches and are somewhat milky in color. 



References: Cunina albescens Gegenbaur, Zeit. fur. Wissen. Zool. 

 Bd. 8, p. 260, taf. 10, figs. 3, 4, 1856. 



Cunina moneta Leuckart, Archiv. f. Naturgesch. Jahrg., vol. 22, 

 p. 36, taf. 1, fig. 13 ; taf. 2, fig. 12, 1856. 



Cunina solmaris Hertwig, O. & R., Nerven. Syst. Sinnesorgane der 

 Medusen, pp. 19, 34, taf. 1, figs. 7-10; taf. 10, fig. 6, 1879. 



Solmissus albescens Haeckel, Syst. der Medusen, p. 350, 1879. — 

 Bigelow, H. B., Mem. Mus. Comp. Zool., vol. 37, p. 63, 1909.— 

 Mater, Medusae of the World, Publ. 109, Carnegie Inst. Wash- 

 ington, vol. II, p. 482, figs. 326, 327, 1910. 



Polyxenia albescens Metschnikoff, Embryol. Studien an Medusen, 

 Wien, pp. 23, 65, 1886. 



