86 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



ing tables with curved disk with 4 central holes and a small hole in each 

 end, spire with 2 pillars and ending in a few lobes or blunt teeth which 

 lie in one plane. Color white. 



Type.— M.C.Z. 



Type locality. — Zaca Sta. 196 D-17. 



Distribution. — Tangola Tangola Bay, Mex. 



Depth. — From 23 fms. 



Specimens examined. — The type. 



Remarks. — The type measures about 3 cm. in length. The skin is 

 rigid with spicules. The oral end with the tentacles and calcareous ring 

 is lost as well as most of the inner organs. It is therefore only tentatively 

 that the species is referred to Pentamera. 



2. Pentamera beebel Deichmann 

 Plate 12, Figs. 1-9 



Pentamera beebei Deichmann, 1938, p. 374, text fig. 7. 



Diagnosis. — Typical small pentamerid with minute tables (diameter 

 0.03 mm.) with mostly 4 larger holes and 4 smaller ones; spire 2 pil- 

 lared, ending in a tuft of spines. Feet with large end plate and curved 

 supporting tables with from 2-7 crossbeams in the spire and a terminal 

 tuft of flat lobes. Color white. 



Type.— M.C.Z. 



Type locality. — Zaca Sta. 213 D-15. 



Distribution. — Known from Ballena Bay, Gulf of Costa Rica. 



Depth. — From 40 fms. 



Specimens examined. — The type. 



Remarks. — The type measures few cm. in length. Its striking spicules 

 set it apart from all other species known from the Panamic waters. 



3. Pentamera chierchia (Ludwig) 

 Plate 13, Figs. 19-21 



Cucumaria chierchia Ludwig, 1887, p. 13, pi. 1, fig. 5. 

 Pentamera chierchia Deichmann, 1938, p. 374, text fig. 8. 



Diagnosis. — Small form (about 3-4 cm. long) with numerous feet in 

 5 narrow bands. Calcareous ring with long posterior prolongations. 

 Spicules in varying numbers, in some individuals almost completely lack- 

 ing. Skin with 4-holed tables with dentate margin and 2-pillared spire 

 with few irregular teeth; often the spire is reduced to knobs or com- 



