262 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



Island or anywhere along the American coast. Mortensen reports it "with 

 full certainty" from Clarion Island^ but the Velero visited that isolated 

 island twice and made 17 hauls of the dredge, besides two collecting trips 

 along shore, and failed to find a single specimen. Certainly it should be 

 found on the rich collecting ground at Cocos Island, if it occurs north of 

 the Galapagos. If it is found on the American coast anywhere it is strange 

 that the Velero has not met with it. It may be added that Dr. Coker did not 

 find it on the Peruvian coast during his stay there (1907-1908) nor did 

 the Templeton-Crocker Expedition secure any specimens at Clarion 

 Island in 1936. There seems no adequate reason for doubting that this 

 sea-urchin occurs only at the Galapagos Islands. 



Type. — Paris Museum. 



Type locality. — Galapagos Islands. 



Depth. — Shore to 73 fms. 



Specimens examined. — 863 specimens from 43 stations. 



Toxopneustes roseus (A. Agassiz) 

 Plate 42, Fig. 17 



Boletia rosea A. Agassiz, 1863, p. 24. 

 Toxopneustes roseus ^lorttnstn, 1903, p. 111. 



Grant and Hertlein, 1938, p. 26, pi. 17, figs. 1, 2. 



Mortensen, 1943, p. 483, pi. 31, figs. 1-5. 

 Not a very common sea-urchin of the Panamic region, this large and 

 striking species was not often secured by the Velero; only in 1933-34, 

 1934-35, 1938 and 1939 were specimens taken. Of the 22 specimens at 

 hand, 14 are from Panama, near Secas Islands, in 3 fms. Of the remaining 

 8, 3 are very small (15-23 mm in diameter) and only one is more than 

 half grown. Even the smallest is easily distinguished by the relatively 

 huge and commonly widely open globiferous pedicellariae. The extra- 

 ordinaiy appearance of the living sea-urchin is admirably shown in 

 Mortensen's figures of the closely related species, pileolus (1943, pi. 26, 

 fig. 3 and pi. 27, fig. 2). No other sea-urchin gives any such display of 

 pedicellarian power as does Toxopneustes. The western Pacific species of 



5 The expression "with full certainty" quoted from my Monograph (p. 459) 

 refers to the identification of the specimens of L. seinhuberculatus from Clarion 

 Island mentioned by Clark in his catalogue of Recent Sea-Urchins in the Coll. of the 

 British Museum, p. 120, the identification of other specimens being uncertain, as 

 pointed out both by Clark and myself. The locality Clarion Island of the specimens 

 in the British Museum may be erroneous. Th. Mortensen 



