382 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Operculina elegans — Material examined. 



OPERCULINA AMMONOIDES (Gronovius). 



Nautilus ammonoides Gronovius, Zooph. Gron., 1781, p. 282, pi. l5, figs. 5, 6, 



Operculina aminonoides Parker and Jones, Introd. Foram., 1862, Appendix, p. 



310.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 745, pi. 112, 



fige. 1, 2.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 4, 1914, p. 37, pi. 14, fig. 7.— 



Heron-Allen and Earland, Trans. Zool. Soc, London, vol. 20, 1915, p. 737. 



This species is recorded by Brady in the Philippines in 95 fathoms 

 (174 meters), and by Heron-Allen and Earland as "not imcommon 

 in some dredgings we have from off Cebu (Philippine Islands) , but 

 the specimens are all very small compared with our British records." 



All but one of the stations at which the specimens were found in 

 the Philippine collection are from more than 100 fathoms (183 

 meters), and, except for this station, they range from 138 to 805 

 fathoms (252 to 1,472 meters) ; bottom temperatiu-es are not low, and, 

 except for two at 42.3° F. and 47.5° F. (5.7° C. and 8.6° C), they 

 range from 50.5° F. to 58.3° F. (10.2° C. to 14.6° C). 



The usual habitat for this species is comparatively deep and cold 

 water, yet at several stations numerous specimens were found. 

 They are all very typical and are not of large size, as has already been 

 noted by Heron-Allen and Earland in their material from off Cebu. 



Operculina ammonoides — Material examined. 



