GEODIA AGASSIZII. 



137 



The large oxysphaerasters of the specimens from Station 4228 above re- 

 ferred to, which in their dimensions equal the sterrasters, are rather similar to 

 some of the young stages of the sterroids. They may therefore be such spic- 

 ules, in which the development has, as it were, gone wrong, the thickening of 

 the rays, which normally leads to the formation of a large solid centrum, and 

 the formation of the spines on the rays having been suppressed. 



LOCALITIES AND NATURE OF EMVIRONMENT. 



Number of 

 Station 



Locality 



Date 



Depth 



Bottom 

 temperature 



Bottom 



Number of 

 specimens 



2886 



Off Oregon, 43° 59' N., 124° 

 56' 30" W. 



19 Oct., 1888 



91 m. (50 f.) 



9° 



(48.1° F ) 



Rocky 



8 



2887 



Off Oregon, 43° 58' N., 124° 

 57' W. 



19 Oct., 1888 



77 m. (42 f.) 



8.4° 

 (47.1° F.) 



Clay, pebbles 



1 



2978 



Off southern California, 33° 

 59' 4.5" N., 119° 22' 15" W. 



12 Feb., 1889 



84 m. (46 f.) 



13.6° 

 (56.5° F.) 



Gray ,sand 



2 



3088 



Off Oregon, 44° 28' N., 124° 

 25' 30" W. 



3 Sept., 1889 



84 m. (46 f.) 



8° 



(46.3° F.) 



Clay, pebbles 



1 



3168 



Off central California, 38° 01' 

 25" N., 123° 26' 55" W. 



24 Mar., 1890 



62 m. (34 f.) 





Rocky coral 



1 



4193 



Gulf of Georgia: Halibut 

 Bank; Cape Roger Curtis, 

 Bowen Island: 8. 89° E., 20 

 ktn. (10.8 miles), drift S. 1° E. 





33-40 m 

 (18-23 f.) 



10.2° 

 (50.3° F.) 



Fine green sand 



2 



4199 



Queen Charlotte Sound: off 

 Fort Rupert, Vancouver Is- 

 land, B. C. Centre of Round 

 Island. S. 46° W., 11.5 km. 

 (6.2 miles), drift S. 85° E. 



25 June, 1903 



124-196 m. 

 (68-107 f.) 



7.7° 

 (45.9° F.) 



Soft green mud 

 and volcanic 

 sand 



4 



422 S 



Vicinity of Naha Bay: Behm 

 Canal. S. E. Alaska, Indian 

 Point. N. 18° E., 1.7 km. (0.9 

 miles), drift N. 2° W. 



7 July, 1903 



75-245 ni. 

 (41-134 f.) 



8.8° 

 (47.8° F.) 



Crivel and 

 sponge spicule:- 



2 



4551 



Monterey Bay, Cal.; Point 

 Pinos Light House. S. 9° E.. 

 8.4km. (4.5 miles) .drift S. 37°E. 



7 Jime, 1904 



102 m. (56 f.) 





Coarse sand, 

 shells, rock. 



1 





Houston Stewart Channel, 

 Queen Charlotte Island. 



1893 









1 



The young stages of the sterroids have been observed only in the young 

 specimen from Station 4228 and in the immature specimen described by 



