312 bulletin: museum of comparative zoology. 



of the 0. maculosa material the finer scaling of the disk is noticeable 

 and the upper arm -plates are not at all swollen or notched. The two 

 species may therefore be considered distinct. 



Ophiactis resiliens. 



Lyman, 1879. Bull. M. C. Z., 6, p. 36. 1882. Challenger Oph., pi. 20, 

 fig. 7-9. 



This is the characteristic Ophiactis of southeastern Australia. 



Ophiactis nomentis. 



Farquhar, 1907. Trans. N. Z. inst., 39, p. 125. H. L. Clark, 1915, Mem. 

 M.C. Z., 25, pi. 11, fig. 1,2. 



This species is known only from Cape Maria van Dieman, New 

 Zealand. It is very near the preceding, though apparently larger, 

 but if the differences in the oral shields and adoral plates prove to be 

 constant, the two forms may well be kept apart. 



OPHIOTRICHIDAE. 



Ophiothrix angulata. 



Ophiura angulata Say, 1825. Journ. Acad. nat. sci. Phila., 5, p. 145. 

 Ophiothrix angulata Ayres, 1852. Proc. Boston soc. nat. hist., 4, p. 249. 



Few brittle-stars have their specific characters as little fixed as this 

 common and long-known species. It ranges from North Carolina 

 southward to the Rio Plata, perfectly unmistakable examples from 

 each of these regions being in the M. C. Z. collection. We also have 

 specimens from Vera Cruz, from Yucatan, and from the north coast 

 of Panama as well as from Florida and many of the West Indian Is- 

 lands. Verrill records it from the Bermudas and from Chesapeake 

 Bay. The last record is probably incorrect, as elsewhere Verrill 

 records the northernmost record as 35° 21' N. in 16 fms., and in a 

 subsequent paper he gives Cape Hatteras as the northernmost point. 

 The bathymetrical range is also notable, extending from low-water 

 mark to below 150 fms. (Blake Exp.) and to 200 fms. (Verrill). As 

 a rule^ specimens from deep water are not typical but one in the 



