NO. 5 CLARK : ECHINI OF WARMER EASTERN PACIFIC 333 



Striking defect but all of the rest are surprisingly different from each 

 other. The least asj^mmetrical has a noticeable concave margin adjoining 

 the right posterior lunule; the holotj^pe has the left anterior lunule still 

 unclosed ; in another the lunules, especially the anterior one, are small ; in 

 several two or more lunules are unclosed ; and finally a specimen 135 x 130 

 mm, is the most distorted of all, having no two interradial margins alike, 

 only the anterior and the interambulacral lunules closed, and the whole 

 left margin irregularly distorted. 



Distribution. — The holotype and 13 paratypes are from Octavia Bay, 

 Colombia, in 2 fms. Two small adults (about 115 mm long) are from 

 Bahia Honda, Panama, one from shore, the other in 15-20 fms, and a 

 similar but smaller specimen is from the Secas Islands, in 3 fms. The very 

 irregular abnormal adult described above and 3 very 3'oung individuals 

 are from Salinas Baj^, Costa Rica, in 2 fms. The other very small specimen 

 is from Cocos Bay, south of Port Culebra, Costa Rica, in 2 fms. Appar- 

 ently this is a southern species, reaching a northern limit in Costa Rica. 



Type. — Holotype AHF no. 53, 13 paratypes. 



Type locality. — Station 434-35, Octavia Bay, Colombia, 2 fms, Janu- 

 ary 28, 1935. 



Distribution. — Colombia to Costa Rica. 



Depth.— 2-20 fms. 



Specinems examined. — The type, paratypes and 8 specimens from 6 

 stations. 



Encope ecuadorensis^^, new species 

 Plate 59, Figs. 54-55 



Test rather stout, 139 mm long, 146 mm wide and 15 mm high; 

 greatest thickness just anterior to the paired petals, when it decreases 

 slowly until near the posterior lunules and then more rapidly to margin. 

 Unpaired petal 40 mm long and 15 mm wide, elongated elliptical; porif- 

 erous zones narrow, less than one-fourth of petal width, the pore-pairs 

 rather crowded, the ridges between with a close series of 12-16 tubercles; 

 closed tip of petal (which is damaged in the holotype) is about 10 mm 

 from the lunule, which is 12 mm long by 4 mm wide, and some 9 mm from 

 the margin. Anterior paired petals shorter and wider than the unpaired 

 one, the form being somewhat oval rather than elliptical ; they point to the 

 anterior lunules which are 13 x 5 mm, and 10 mm from margin. Posterior 



14 ecuadorensis, in reference to the country where this is the locnl Encope. 



