MUSEUM OF COMPARATIVE ZOOLOGY. 249 



recognizes a greater number, as follows:* (1) Ophiotkrix fragilis, the same 

 as understood by Liitken, but in a narrower limit ; Denmark, Norway, etc. 



(2) Ophiothrix quinquemaculata, as distinguished by Liitkea ; Naples. 



(3) Ophiothrix alopecurus Mull. & Trosch. from Trieste, which Mr. Ljung- 

 man identifies with 0. fragilis M. T., tenuispina Sars, and echinata Ltk. 



(4) Ophiothrix metadata Ljn. ; Josephine Bank, 120 fathoms. (5) Ophio- 

 thrix pentaphyllum, common on south coast of England and west coast of 

 France; identified with Asterias pentaphyllum of Pennant, and included by 

 Liitken in his 0. fragilis. (6) Ophiothrix lusitanica Ljn. ; as already de- 

 scribed above ; Portugal. Dr. Ljungman had not seen 0. Lutkeni, and 

 therefore does not refer to it. It is sufficient to prove the difficulty of the 

 subject, that, of the two European authors best qualified to judge, one recog- 

 nizes four and the other seven species. 



Combining the information from these authorities with personal observa- 

 tion, I am inclined to divide the species as follows : — 



1. Ophiothrix fragilis Dub. & Kor. 

 A sterias fragilis Ablg. 



Ophiothrix Rammelsbergii Mull. & Trosch. 



Ophiothrix alba (?) Grube. 



Ophiothrix fragilis Sars,Ltk. (pars). Denmark, Norway, Iceland, Faro Isl's. 



2. Ophiothrix quinquemaculata Mull & Trosch. 

 Asterias quinquemaculata Dell. Ch. 



Ophiothrix quinquemaculata Ltk. 



Ophiothrix echinata (?) Ljn. (non Mull. & Trosch. nee Ltk.). West Coast 

 of Italy. 



3. Ophiothrix echinata Mull. & Trosch. (non Ltk. nee Ljn.). 

 Asterias echinata Dell. Ch. 



Ophiothrix fragilis (car. mediterranea, juv.) Ltk. 



Ophiothrix rubra (?) Ljn. Algeria, west coast of Italy, Adriatic, Egypt. 



4. Ophiothrix alopecurus Mull. & Trosch. 

 Ophiothrix fragilis (?) Mull. & Trosch. {non Asterias Ablg.). 

 Ophiothrix fragilis (car. tenuispina) .Sars. 



Ophiothrix echinata Ltk. {non Mull. & Trosch. nee Ljn.). North Adriatic. 



5. Ophiothrix pentaphyllum L.jx. 



Asterias pentaphyllum ; varia ; aculcata ; haslata ; fssa ; nigra; Pennant 



{teste Ljungman). 

 Ophiothrix rosula Forbes. 

 Ophiothrix fragilis Ltk. (pars). South coast of England, west and north 



coast of France, Madeira (?). 



6. Ophiothrix lusitanica Ljn. 



Ophiothrix rubra (?) Ljn. Northwest coast of France, Portugal, Naples. 

 * Letter, March, 1873. 



