144 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



863-38. Bahia Honda, Panama, off North Island, 30-50 fms., March 1, 

 1938, 1 specimen (fair). 

 Remarks. — The Velero material differs from the material examined 

 by Ludvvig and Perrier in the presence of the numerous towers with 

 broad smooth base. The cups or baskets agree well with Ludwig's figure; 

 possibly Perrier's drawing is somewhat inaccurate; the marginal teeth 

 on the cups are too few and too coarse. It was a satisfaction to discover 

 that the tube feet actually were packed with the curved squarish plates as 

 was to be expected, not exclusively lying free in the skin as Perrier 

 describes it; a few simple curved oblong plates may be found in the wall 

 of the feet as in the other species. 



2. Psolidium eubullatum, new species 

 Plate 28, Figs. 4-7 



Diagnosis. — Small form (type measures about 1 cm.). Sole with feet 

 restricted to the margin and the anterior end of the midventral ambu- 

 lacrum. Dorsal side with about 14 scales between oral and anal scales; 

 dorsal feet few. 



Spicules in sole heavy buttons or plates with marginal and central 

 knobs. Feet with end plate and perforated plates. Dorsal side apparently 

 without any spicules except the scales; even the tube feet seem to lack 

 spicules entirely. 



Type. — Holotype, AHF no. 38, 3 paratypes. 



Type locality.— S>\imon 213-34, La Plata Island, Ecuador, 7-10 fms., 

 north of Anchorage, rocky, February 10, 1934, 3 specimens. 



Distribution. — Known from Ecuador. 



Depth. — From 7 to 55 fms. 



Specimens examined. — ^The type and 3 specimens from the following 

 Velero stations : 

 212-34. La Plata Island, Ecuador, dredging 45-55 fms., sand shale, 



rock, mud, Februaiy 10, 1934, 1 specimen. 

 213-34. La Plata Island, Ecuador, 7-10 fms., February 10, 1934, type 

 and 2 paratypes. 



Reinarks. — The specimens bear some resemblance to P. bullatum 

 Ohshima, (1915, p. 282) from the Alaskan waters, 54 fms., and may 

 possibly be found to be identical with that form. The unusually low 

 depth at which it is taken is noteworthy, and information about the hydro- 

 graphic conditions at La Plata Island is most desirable. 



