110 Mr. E. A. Smith on S/jeciea of 



Leptychaster, gen. nov. 



Discus 5-radiatus, compressus ; radii mediocriter elongati ; super- 

 ficies dorsalis fascicules pedunculatos confertos spinarum minu- 

 tarum gerens ; radiorum latera serie unica tessellarum tenuium 

 transversarum lamellariuin , ad ambulacra liaud productarum 

 munita ; interstitia inter tessellas et ambulacra spinarum parvarum 

 fasciculis ordinatim cum tessellis dispositis ornata ; tessella madre- 

 poriformis marginalis, in angulo interradiali sita. 



This genus shows more affinity to Lmdia than to any other. 

 It difters from it, however, in the lateral lamellar plates being- 

 covered with minute spines not extending to the ambulacra, 

 in the absence of elongated spines, and the body being pro- 

 portionally larger than in that genus. 



Lepty chaster Icerguelenensisj sp. nov. 



Discus 5-radiatus, mediocriter magnus, compressus, supra infraque 

 planus, latitudine radiorum longitudinis circiter i aequans ; radii 

 sensim attenuati,basihaudlatissimi; spina? ambulacrales graciles, 

 quaternis vel quinis sulcis transversce, intimis duobus longissimis, 

 cseteris sensim brevioribus ; oris anguli interradiales acuti, sjiinis 

 4-5 utrinque muniti ; radiorum latera et superficies iaferiores tes- 

 sellis transversis, angustis, lamellaribus (qu?e versus radiorum api- 

 cem fere ad spinas ambulacrales productae, sed basim versus ab illis, 

 spatium triaugulare in angulo interradiali relinquentes, recedunt) 

 instructa ; hae tessellre spinis minutis seabris amictae, ad angulos 

 interradiales longissimce, et versus radiorum ajjices sensim deciu'- 

 tata3 ; inter eas spinasque ambulacrales fere per radiorum longi- 

 tudinem totam series est unica faseiculorum parvorum spinarum 

 brevium, sed versus radiorum basim sunt sensim series seeunda, 

 tertia et quarta, omnes ordinatim cum tessellis disposita? ; super- 

 ficies dorsalis fascicules pedunculatos confertos spinarum breviura 

 gerens ; tessella madreporiformis mediocriter magna, subovalis, 

 marginalis, in angulo interradiali sita, et spinarum fasciculis ob- 

 tecta. 



Disci diam. 23 millim., crass. 8 ; radiorum longit. 38, diam. ad 

 basim 13. 



The fascicles of little spines on the dorsal surface are raised 

 on short fleshy peduncles, and are very closely packed ; and 

 tlie madreporic plate is concealed by similar groups of spines. 



Ophiuridje. 



Ophiacaathu vwiparal^ Ljungman. 



The specimens from Kerguelen's Island appear to differ 

 slightly in a few respects from those described by Ijjungman, 

 in the 'Q^fversigt af Kongl.Vetenskaps Akad. Forhandl.' 1870, 

 p. 471. The habitat given (Altata,on the west coast of Mexico) 



