74 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 59. 



BILOCULINA DENTICULATA (H. B. Brady). 



Biloculina ringens (Lamarck), var. denticulata II. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 143, pi. 3, figs. 4, 5. 



Biloculina denticulata Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 180, 

 pi. 33, fig. 1. 



This is a common species of the Indo-Pacific in shallow water. 

 It occurred at Runaway Bay and at stations 4, 5, and 6 at Montego 

 Bay. Specimens occur at other localities in the West Indian and 

 Florida region. 



BILOCULINA ELONGATA d'Orbigny. 



Biloculina elongata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 298, No. 4. 

 Biloculina oblonga d'Orbigny, Foram. Cuba, 1839, p. 163, pi. 8, figs. 21-23. 



This is the least common of the Jamaican species of Biloculina. 

 It is represented by single specimens from Runaway Bay and at 

 station 4 in Montego Bay. 



As near as can be determined d'Orbigny's Biloculina oblonga of the 

 Cuban Monograph is also this species. It is recorded by d'Orbigny 

 from Cuba and Jamaica. 



Genus PENEROPLIS Montfort, 1808. 



This genus has usually been treated as containing a single variable 

 species. Basing on the Challenger report most writers have followed 

 Brady's example. In their paper on the Fo- 

 raminifera of the Kerimba Archipelago Heron- 

 Allen and Earland have examined into the early 

 descriptions and figures of Peneroplis and after 

 an exhaustive treatment have made five species. 

 Such a treatment seems admirable, and all work- 



^c^Th'b™ Z; ers on the g™ u P wil1 I* dul y g™ teful for such a 



o, front view; 6, side helpful labor. Anyone who has worked over 



view. Specimen from 6 • i • ■, , • • • .* . i • 



fathoms, montego bay. tropical material containing specimens of this 

 x ^ genus has probably realized that there are numer- 



ous groups which, although variable, are nevertheless variable only 

 within certain limits, and the groups do not merge with one another. 

 The treatment of the Jamaican material follows that of Heron- 

 Allen and Earland with the exception of the addition of two others 

 based upon the West Indian material. D'Orbigny described and 

 figured Peneroylis proteus from Cuba and Jamaica, and it has been 

 found to be the most common species in this material. The form 

 described by Flint in 1899 as var. discoid eus is here placed as a valid 

 species after finding it abundant and constant in both recent and 

 fossil material of the West Indies, showing that its characters must 

 have been fixed for a considerable length of time. For the data 

 arriving at the division into species the reader is referred to the 

 original work of Heron-Allen and Earland. 



