452 BULLETIN : MrSEUM OF COMPARATIVE ZOOLOGY. 



lacking, combines with the non-shagreened and rather numerous disk- 

 plates, and the small, grouped arm-spines to give this species a very 

 characteristic facies. It does not seem to be very nearly related to 

 any previously knowTi species. 



Ophiozonella clypeata. 



Ophiozona clypeata Lyman, 1883. Bull. M. C Z., 10, p. 234, pi. 3, fig. 13-15. 

 Ophiozonella clypeata Matsumoto, 1915. Proc. Acad. nat. sci. Philadelphia, 

 67, p. 82. 



I have hesitated referring this specimen to the West Indian species, 

 0. ch/pcata, but it is fully adult (10 mm. across the disk) and in excel- 

 lent condition and I can find no valid reason for giving it a new name. 

 •It differs slightly from the type of 0. clypeata in the scaling of the disk 

 and in the shape of the oral shields, but these differences are so trifling 

 that one cannot seriously consider them as due to anything more 

 than individual diversity. 



Station 4642. Galapagos Islands: Hood Island, 4 miles southeast 

 of Ripple Point. 300 fms. Bott. temp. 48.6°. Brk. sh., glob. 



One specimen. 



Ophiotypa simplex. 



Koehler, 1897. Ann. sci. nat. Zool., ser. 8, 4, p. 281, pi. 5, fig. 1-3. 



It is a matter of considerable interest to find this very remarkable 

 brittle-star in the eastern Pacific. It is known from the Indian 

 Ocean and from the eastern Atlantic, so it seems probable that it is 

 cosmopolitan. These specimens are of full size and well preserved, 

 but show no noteworthy features of their own. 



Station 4721. Eastern Tropical Pacific, 8° 7' 30" S., 104° 10' W., 

 2084 fms. Bott. temp.? Lt. br. glob. oz. 

 ' Two specimens. 



Ophioleucidae. 



Ophiernus annectens. 



Lutken and Mortensen, 1899. Mem. M. C. Z., 23, p. 107, pi. 5, fig. 4-6. 



The specimens are in very bad condition but there is no reason to 

 doubt their identity. 



