MILIOLIDAE — PENEROPLIS. 79 



Peneroplis carina tus d'Orbigny. 



Peneroplia carinatus d'Orbigny, Voy. Am6r. M6rid., vol. 5, pt. 5, 1839, "Foraminiftres," 

 p. 33, pi. 3, figs. 7, 8. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 205, pi. 13, fig. 14. — Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 75 pi 

 18, fig. 12. 



At two stations in the area there were abundant specimens which 

 can be referred to P. carinatus d'Orbigny, but it does not seem to 

 occur elsewhere. It was very rare in the Jamaican collection. 



Peneroplis planatus (Fichtel and Moll). 



Peneroplis planatus d 'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 285, No. 1 ; Modules, 1826, 

 No. 16. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 204, pi. 13, 

 fig. 15. — Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 75, pi. 18, fig. 9. 



Next to P. proteus this is the most common species of the genus 

 in the collection. There are two forms, one in which the test is 

 very thin and translucent, with the surface ornamented by numer- 

 ous fine, longitudinal costae, the other with a thicker test, the surface 

 smooth. 



Peneroplis proteus d'Orbigny. 



Peneroplis protea d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, "Forami- 



nifferes," p. 60, pi. 7, figs. 7 to 11. 

 Peneroplis dubius d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, "Forami- 



nifferes," p. 62, pi. 6, figs. 21, 22. 

 Peneroplis proteus Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 75, pi. 18, figs. 13 to 19. 



Peneroplis proteus is by far the most common species of the genus 

 in the region, occurring at nearly all of the stations, and often in 

 very considerable numbers. The figures I have given, the specimens 

 from Jamaica, with those given by d'Orbigny, show the range of 

 form in this West Indian species. The surface is smooth and glossy, 

 sutures distinct, and its general characters, in spite of the variability 

 of outline, are very distinctive. P. dubius d'Orbigny is undoubtedly 

 the young of this species. I found it common on the north coast of 

 Jamaica and it seems to be widely distributed in the general West 

 Indian region and perhaps elsewhere. D' Orbigny 's specimens were 

 from Cuba and Jamaica. The figures given by Brady (Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, plate 14, figs. 3, 4) are probably 

 this species. 



Peneroplis arietinus (Batsch). 



Peneroplia arietinus Parker, Jones, and Brady, Ann. Mag. Nat. Hist., ser. 3, vol. 16, 1865, 

 p. 26, pi. 1, fig. 18.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 204, pi. 13, figs. 18, 19, 22.— Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, 

 p. 75, pi. 18, fig. 10. 



There is only one specimen in the entire collection which can be 

 referred to this species. This, however, is of the tjrpical form. It 

 was also rare at Montego Bay, Jamaica. 



