90 APPENDIX. 



Cribrella sanguineolenta Liitk. Leptasterias compta (Stimp.) Ver- 



Ctenodiscus crispatus Dan. & Kor. rill. 



Crossaster papposus Mull, and Hippasterias phrygiana Agassiz. 



Troschel. Pteraster militaris Mull. &Trosch. 

 Leptasterias tenera (Stimp.) Ver- 



riU. 



OPHIUROIDEA. 



Amphiura squamata Lyman. Ophiacantha bidentata I/jung. 



Amphiura tenuispina Ljung. Ophioglypha Sarsii Lym. 



Gorgonocephalus Agassizii Stimp. Ophiopholis aculeata Gray. 



NOTE. The author has indicated by italics in the above list several gonera and 

 species which cannot be identified by the use of the "Aid." In addition to those 

 there are several others which the author has never seen, and others which more 

 properly belong to deep water than to the regions indicated for the scope of this 

 article. For the introduction of these the author claims the kind indulgence of the 

 reader. Many genera found in very deep water are omitted. 



The author's studies of marine animals upon which he has mainly relied in the 

 preparation of this "Aid" were made during his connection with Dr. A. Agassiz' 

 Marine Laboratory at Newport, R. I., and the Museum of Comparative Zoology 

 at Cambridge. He takes this opportunity to express his gratitude for the advan- 

 tages afforded him at those places. 



He has spent portions of four summers at Eastport and Grand Manan, and 

 made frequent excursions to Provincetown, Beverly Bridge, Chelsea Beach and 

 Ipswich. 



A more complete list of the Act.inoids and Echinodermata will be found in "Ver- 

 rill's List," which has been of great help to the author in the preparation of this 

 Aid, and for which he wishes to express his thanks. 



