NO. 3 DEICHMANN : HOLOTHURIOIDEA ; PART I, DENDROCHIROTA 79 



1. Cucumaria calif omica Semper 

 Plate 10, Figs. 6-8 



Cucumaria calif ornica Semper, 1868, p. 235, pi. 39, fig. 16; pi. 40, fig. 

 10.— Lampert, 1885, p. 147.— Theel, 1886, p. 109; 1886a, p. 8. 

 Nee Cucumaria calif ornica Edwards, 1910, p. 601 (i.e., C. fallax Lud- 

 wig — an Arctic species, known from Bering Sea). 

 Diagnosis. — Medium-sized form (10 cm.), with soft, bushy tentacles 

 of equal size. Skin soft, slipper\'; feet large, soft, completely retractile, 

 restricted to the ambulacra. Calcareous ring simple, other anatomical 

 features very nearly as in the type species. Spicules oblong knobbed plates, 

 often with a spinous handle, and 4-holed buttons, frequently reduced or 

 lacking. Feet with a vestige of an end plate and numerous 3-armed per- 

 forated supporting rods. Introvert and tentacles with perforated plates 

 or rods, often completely reduced. Color varying from dark slate gray 

 or black to almost white ; tentacles seem always to be darkly pigmented. 

 Holotype. — Possibly in Germany. 

 Type locality. — Mazatlan, Mexico. 



Distribution. — ^West coast of Mexico and Central America, possibly 

 to Peru. 



Depth. — From shore to about 100 fms. 



Specimens examined. — Numerous in the U.S.N.M., and the follow- 

 ing from the Allan Hancock Expeditions : 



261-34. Tangola Tangola, Mex., 15-20 fms., March 1, 1934, 4 speci- 

 mens. 

 286-34. Thurloe Bay, Thurloe Point, L. Calif., Mex., shore, March 9, 



1934, 8 specimens. 

 466-35. Parker Bay, Costa Rica, shore, February 9, 1935, 3 specimens. 

 527-36. South of Mangles Anchorage, L. Calif., Mex., shore, Feb- 

 ruary 28, 1936, 1 specimen. 

 537-36. Spit, north of mill site, Angeles Bay, L. Calif., Mex., shore, 



March 2, 1936, 10 specimens. 

 617-37. San Juanico Bay, L. Calif., Mex., 24 fms., March 2, 1937, 2 



specimens. 

 623-37. Cabeza Ballena, east of Cape San Lucas, shore, March 4, 1937, 



2 specimens. 

 683-37. Concepcion Bay, L. Calif., Mex., 12 fms., March 15, 1937, 



1 specimen. 

 824-38. San Juan Bay, Peru, 15-20 fms., February 7, 1938, 1 specimen. 



