the Genera and Species of Starfish. 



287 



2. Nardoa Agassizii, Gray. Rays cylindrical, tubercles subequal. 

 Var. 1. 4-rayed, Linck, t. 1. f. 1 ; Var. 2. 6-rayed. Monstrosity 1, 



7-rayed. Monstrosity 2, 3-rayed, with 2 short rays on the opposite 

 side. Monstrosity 3, with 1 ray bifid, Linck, t. 14. f. 2. 4. 

 Inhab. Isle of France. Dr. W. E. Leach. 



3. Nardoa tuber culata, Gray. Rays cylindrical, with scattered 

 hemispherical larger tubercles. 



Inhab. Island of Luzan, Port of Sual. H. Cuming, Esq. 



28. Narcissia, Gray. 



Body pyramidical, thin, coriaceous, uniformly granular ; rays 

 tapering, elongate, triangular on the base, formed of thin flattened 

 ossicula. 



1 . Narcissia Tenenffce. Rays tapering, elongate, acute, more than 

 4 times as long as the width of the body. 

 Inhab. TenerifFe. Brit. Mus. 



29. Nectria, Gray. 



Body rather pyramidical, coriaceous, scattered with truncated 

 warts, granular at the top ; rays roundish, produced, edged with 2 

 series of flat granular warts on each side, beneath largely granular. 



1. Nectria oculifera. Asterias oculifera, Lam. n. 5 ; Oudart, t. . 

 f. . 



Inhab. . Brit. Mus. ■ 



30. Nepanthia, Gray. 



Body small, flat ; rays very long, cylindrical, tapering, not mar- 

 gined, formed, above and below, of many regular longitudinal and 

 transverse series of flat-topped tubercles, furnished at the top with a 

 series of elongate spine-like granulations. 



Intermediate between Astropectinidce and Cribellince, but the rays 

 are not margined, and the spines at the top of the tubercles are 

 not regularly radiately disposed. 



1. Nepanthia tessellata. Brown ; rays elongate, slender, tapering, 

 with series of square warts. 



Inhab. . Brit. Mus. 



2. Nepanthia maculata. Gray with black spots ; rays rather de- 

 pressed, blunt, middle of the back with oblong transverse, and the 

 sides with squarish, warts. 



Inhab. Migupou. H. Cuming, Esq. 



d. Ambulacra ivith very fine long hair-like spines placed in rounded 

 groups, with a series of large spines near them. 



31. Mithrodia, Gray. 



The rays cylindrical, elongate, spinulose ; the skeleton netted with 

 scattered small rugose spines, and series of large clavate spinulose 

 spines regularly articulated to a broad expanded base on the sides of 

 the arms. 



