OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 15 



that they are conical (kegelformige) , and in his figure they are clearly 

 shown as small, triangular, and pointed, quite the same as the ad- 

 jacent mouth papillae. 



In the form of the teeth, therefore, there is a difference between 

 O. forbesi and 0. brevispina analogous to that separating the genera 

 Ophiurodon and Ophiuroconis. In my opinion these two species can 

 not be placed in the same genus, and I propose to leave in the genus 

 Ophioconis 0. forbesi only, the genus thus again becoming, as for- 

 merly, monotypic. As for O. brevispina, it certainly can not be 

 referred to Matsumoto's Ophiuroconis. If the shape of the teeth is 

 really that which Ludwig has figured, it must be very close to the 

 species which H. L. Clark has assembled in his new genus Crypto- 

 pelta, and I therefore propose that it be referred to this genus. 



There remains to be considered O. indica, which I placed in the 

 genus Ophioconis in 1896; but it is evident that it can not remain 

 here, and also that it can not be assigned to either of the new genera 

 proposed by Matsumoto. I agree entirely with the objections which 

 he raises in regard to placing it to the genus Pectinura, on account of 

 the characters of the spines and the presence of a single tentacle scale ; 

 but, on the other hand, it is obvious that it is extremely close to the 

 species of Cryptopelta, especially to C. aster. It can not, however, 

 be assigned to this genus, of which one of the primary characters is 

 found in the condition of the mouth shields, which are covered with 

 granules, as in O. indica these shields are naked. I suggest that it be 

 made the type of a new genus, for which I propose the name Gymno- 

 pelta, in contrast to Cryptopelta. 



The reclassification of the species assigned to the old genus Ophio- 

 conis (taiken in the broad sense) is as follows: 



Genus Ophioconis Liitken Ophioconis forbesi (Heller). 



Genus Ophiurodon Matsumoto Ophiurodon cincta (Keehler). 



Ophiurodon cupida (Koehler). 



Ophiurodon grandisquania (Koehler). 



Ophiurodon permixta (Koehler). 

 Genus Ophiuroconis Matsumoto Ophiuroconis miliaria (Lyman). 



Ophiuroconis monolcpis Matsumoto. 



Ophiuroconis pulverulenta (Lyman). 

 Genus Cryptopelta H. L. Clark Cryptopelta, brevispina (Ludwig). 



[Cryptopelta aster (Lyman)]. 



[Cryptopelta granulifera H. L. Clark]. 



Genus Gymnopelta Ko?hler Gymnopelta indica (Koahler). 



Genus Ophiolimna Verrill Ophiolimna antarctica (Lyman). 



Ophiolimna diastata (H. L. Clark). 



Ophiolimna papillata (H. L. Clark). 



The first ten species must be placed in the family Ophiodermatidae, 

 and the three last, assigned to the trenus Ophiolimna, in the family 

 Ophiacanthidae. 



