NO. 5 CLARK : ECHINI OF WARMER EASTERN PACIFIC 339 



Distribution. — The Velero found no Cassiduloids along the mainland 

 coast. All of the 20 specimens were taken at islands, 9 at Socorro, 9 at 

 Clarion, and one, with the adult fragments was dredged in 48-73 fms 

 near Barrington Island in the Galapagos Islands. The Socorro specimens 

 were found in 4-10 fms near Cape Rule and in deeper water (10-30 fms) 

 in Braithwaite Bay. The Clarion material was taken oflF the north side of 

 the island in 30-56 fms or off Sulphur Bay in 25-26 fms. Other records 

 show the distribution to include the Gulf of California to Panama. 



Type.—M.Q.Z. no. 2719 (Cotype). 



Type locality. — Acapulco, Mexico. 



Depth. — 4-73 fms. 



Specimens examined. — 20 specimens from 7 stations. 



Family Hemiasteridae 



Agassizia scrobiculata Valenciennes 

 Plate 63, Figs. 62-63 



Agassizia scrobiculata Valenciennes, 1846, pi. 1, figs. 2-2f. 



Although this Spatangoid is reported from various stations between 

 Mazatlan, Mexico and Capon, Peru, the Velero met with it very rarely. A 

 bare test, 16x13x10 mm was found on shore at Willards Island, Gulf of 

 California, far north of Mazatlan, and a large bare test (21 x 19x 16 

 mm) was picked up on shore at Cartago Bay, Albemarle Island, Galapagos 

 Islands. One of the prizes of the Velero' s visit to the Galapagos in 1938 

 is a remarkably fine test of this Spatangoid presented to Captain Hancock 

 by Mr. Osorio of Ritter's Landing, Charles Island. It was picked up along 

 shore but is neither bleached nor damaged in any way, although the spine- 

 coat is entirely lacking. It measures 55 mm in length, 50 mm in breadth, 

 and 40 mm in height. The color is a dull light brown, the 4 genital and 5 

 ocular pores are easily seen and the fascicles are notably distinct. This is by 

 far the largest specimen yet recorded. Besides these bare tests, the Velero 

 dredged one living specimen, a very unusual capture. It is 16 x 14 x 12 mm 

 with the surprisingly long white spines, 2 to 3 mm. The test is white but 

 the dried muscles at the bases of the spines are yellow brown, so the whole 

 effect is very pale brown. This interesting capture was made in the Gulf of 

 California, between Angel de la Guardia and Mejia Islands, in 6-11 fms. 



Distribution. — Gulf of California to Peru; Galapagos Islands. 



Type. — Paris Museum? 



Type locality. — Unknown. 



Depth. — Shore to 11 fms. 



Specimens examined. — 4 specimens from 4 stations. 



