88 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



4. Pentamera chlloensis (Ludwig) 

 Plate 13, Figs. 15-18; text figure 1 



Cucumaria chlloensis Ludwig, 1887, p. 12, pi. 1, fig. 4. — Dei'chmann, 



1938, p. 373, passim. 

 Cucumaria tabulifera R. Perrier, 1904, p. 14; 1905, p. 17, pi. 1, figs. 

 4-5 ; pi. 3, figs. 1-5. 



Diagnosis. — Typical pentamerid, resembles the type species. Spicules 

 tables with oval to squarish disk (diameter 0.06 mm.) with 4 or 8 holes; 

 spires 2 pillared with one or two crossbeams and a few short teeth at 

 the top. Feet with large end plate and numerous curved supporting tables 

 with low spire with 2 pillars and a few flat teeth on the top. Introvert 

 with rosettes ; tentacles with delicate rods. Color white. 



Type. — Possibly in Germany. 



Type locality. — Chiloe Island, Chile. 



Distribution. — Cape Horn and vicinity to L. Calif. 



Depth. — The type came from 40 m. depth ; the Velero specimens were 

 taken at from 8-60 fms. depth. 



Specimens examined. — The following material from the Hancock 

 Expeditions : 



190-34. Lat. 0° 55' S., 90° 30' W., Galapagos, 58-60 fms., January 

 26, 1934, 1 specimen. 



209-34. La Libertad, Ecuador, north of Point Sta. Elena, 8-10 fms., 

 February 9, 1934, 1 specimen. 



213-34. La Plata Island, Ecuador, north of anchorage, 7-10 fms., Feb- 

 ruary 10, 1934, 1 specimen. 



677-37. Ildefonso Island, L. Calif., Mex., 50 fms., March 15, 1937, 

 3 specimens. 



833-38. Independencia Bay, Peru, off north entrance, sand and shell, 8 

 fms., February 10, 1938, 1 specimen. 



Remarks. — The species resembles the type species from the AVest 

 Indies. Ludwig's specimen measured only 9 mm., while Perrier had two 

 specimens, 20 and 23 mm. long. The Velero material falls about within 

 these limits. The species may be expected to reach a length of about 5 

 cm.; the tables in younger individuals may possibly have larger disks 

 with 2 circles of holes; some tables have a dentate edge as if one row 

 of holes had been resorbed. It differs from C. pulcherrima in the lack of 

 perforated plates m the tentacles and the presence of rosettes in the 

 introvert, and the smaller size — characters which may prove to be abso- 



