NO. 5 CLARK : ECHINI OF WARMER EASTERN PACIFIC 337 



or less markedly bulbous tips, lying inclined towards horizontal and form- 

 ing a fairly even coat ; in other specimens the bulbous tips are less uniformly 

 evident, and the coat is not so smooth. Color mummy brown, the lower 

 surface a brighter shade. 



Besides the holotype, there are 4 other adults (100 to 120 mm in 

 greatest diameter) which undoubtedly represent this rather fragile species. 

 The largest closely resembles the type but is a somewhat brighter brown. 

 The other 3 are nearly black, the smallest in particular is very dark above 

 and light purplish gray on the oral side. A specimen 75 mm in diameter is a 

 deep brown while a test 53 mm across is more nearly black. There are 2 

 bleached fragments and 4 very young individuals which are labeled as 

 from Clarion or Socorro Islands. 



Distribution. — The holotype, which is the largest specimen, was taken 

 in Braithwaite Bay, Socorro Island, in 14-18 fms, in January, 1934, and 

 another adult and 8 A^oung individuals were collected at the same time and 

 place. Five months later, 2 small adults, 2 very young specimens and a 

 water worn fragment of an adult were taken at or near the same spot. 

 Five years later one fine adult and 2 very young individuals were taken at 

 Sulphur Bay, Clarion Island, in 25-45 fms. Apparently the species is con- 

 fined to the vicinity of those two islands. 



Type. — Holotype, AHF no. 56, 4 paratj'pes. 



Type locality. — Station 129-34, Braithwaite Bay, Socorro Island, 

 Mexico, 14-18 fms, January 3, 1934. 



Distribution. — Socorro and Clarion Islands, Mexico. 



Depth. — 14-45 fms. 



Specimens examined. — The type, paratypes and 13 specimens, from 5 

 stations. 



Meilita longifissa Michelin 

 Plate 62, Fig. 60 



Meilita longifissa Michelin, 1858, p. 360, pi. 8, fig. 1. 



This striking and easily recognized sand-dollar seems to be either very 

 rare or very hard to collect for in all of the many years collecting by the 

 Velero, it has been met with but once, when 2 apparently dead tests were 

 taken at San Juanico Bay, well up on the western coast of Lower Cali- 

 fornia. They were evidently picked up on the beach as the label reads 

 simply "shore." One is completely bare of spines and is a trifle water worn. 

 The other, which is slightly the larger, has rather more than half the upper 

 surface still fairly well covered with the short, curv^ed, capitate, white 

 spines. As the epidermis of the test is apparently black or blackish, the 

 resulting effect is a "pepper-and-salt" gray. Apparently this was at least 



