208 



PANAMIC DEEP SEA ECHINI. 



In the apical system of a young specimen of 10 mm. the left posterior 

 genital is excluded from the madreporite by the left anterior genital, 

 Fig. 301. The genital pores are already well developed in so small a 



« i 



l> ^ o 



FlO. 301. SCHIZ ASTER TOWNSEXDI, 



I 1 a 



5 

 10 miu. 



Fig. 302. ScHlZASTEB Towxseitdi. 



specimen. The labium of S. Toimsendi, Fig. 302, is in contact with only 

 one actinal ambulacral plate; in S. hdifroiu, Fig. 303, it is in contact with 

 the actinal part of the second plate. On comparing Figs. 302 and 303 



striking differences will be noticed in the 

 relative positions of plates 1, 2, 4, and 6 in 

 the lateral posterior ambulacra, and ot 

 plates 2, 3, 5, 6 and 7 in the lateral ante- 

 rior ambulacra. 



Station 3394, Gulf of Panama, 511 fath- 

 oms. Lat. 7' 21' N. ; Long. 79' 35' W. 

 Bottom temperature, 41 .8. Dk, gn. m. 



Station 3419, off Acapulco, 772 fathoms. 

 Lat. 16° 34' 30" N. ; Long. 100 3' W. Bot- 

 tom temperature, 39 .6. Gn. m. bk. sp. 



Station 3424, off Tres Marias, Gulf of 

 California, 676 fathoms. Lat. 2r^ 15' N. ; 

 Long. 106° 23' W. Bottom temperature, 38\ Gy. s. bk. sp. glob. 



Station 3425, off Tres Marias, 680 fathoms. Lat. 21 19' N. ; Long. 106' 

 24' W. Bottom temperature, 39°. Gn. m. s. 



Station 3426, off Tres Marias, 146 fathoms. Lat. 21 21 N. ; Long. 106^ 

 25' W. Bottom temperature, 51 .2. Rocky. 



6 "■ 

 40 mm. 



Fig. .S03. S. latifrons. 



