186 Bvlletin Vanderbilt Marine Miiseum, Vol. VII 



References : Stichopits horrens, Selenka, E., Zeit. f . Wiss. Zool., 

 Leipzig, 1867, Bd. XVII, p. 316, pi. 18, figs. 27-29.— Clark, 

 H. L., Papers Dept. Marine Biol., Publ., 214, 1921, Carnegie 

 Inst., Wash., vol. X, p. 187, pi. 18, fig. 4 (colour). 



Stichopus godeffroyi variety B., Semper, C. G., Reisen im Archipel. 

 de Philippinen Wiss. Resul. Holothurien, 1868, Bd. I, Theil II, 

 p. 246, Leipzig. — Theel, H., Rept. Sci. Res. Voyage H. M. S. 

 "Challenger" Zool., 1885, vol. XIV, p. 168, p. 196, pi. 7, fig. 8. 



Stichopits tropicalis, Fisher, W. K., Proc. U. S. Nat. Mus., 1907, 

 vol. XXXII, p. 676, pi. 70, fig. la-i. 



Family: CUCUMARIIDAE 



Genus: PENTACTA Goldfuss 

 Pentacta arae, new species 



■f 



Plates 69 and 70 



Type : Two specimens were taken by the "Ara," the smaller 

 one at the mouth of the Saigon River, Cochin China, in eleven 

 fathoms, and the larger one in seven fathoms, at Southwest Bay, 

 Pulo Condore Islands, South China Sea, February 4, 1929. These 

 are deposited in the Vanderbilt Marine Museum. 



Technical description: The smaller specimen (alcohol pre- 

 served) is about 75 millimeters long diameter and 55 millimeters 

 maximum short diameter, which occurs approximately midway 

 the length. The body is distinctly unequal ovoid, globular, with 

 the oral and aboral apertures definitely dorsad. The ventral sur- 

 face, which is occupied by the three ambulacra of the trivium, 

 appears to be distinctly wider than the dorsal surface bounded by 

 the bivium. There are five valves at the anterior extremity. Ten 

 tentacles are present, the two ventral ones being a little smaller 

 than the others. The calcareous ring is composed of five simple 

 pieces. The pedicels are numerous on the ambulacra of the trivium. 

 On the upper two of the ventral ambulacra, the pedicels persist 

 almost to the orifice in much reduced form, those of about the 

 first eight pairs being more widely spaced from each other and 

 irregularly scattered in somewhat alternate series, on the anterior 



