INSTITUTE OF SCIENCE, PHILADELPHIA. IO5 



" Fasciolaria " Woodii Gabb. 

 F. IVoodii Gahh, Journ. Acad. Nat. Sci Phila. iv., 2d series, p. 375, pi. 67, fig. 7, i860. 

 Fasciolina Woodii Conrad, Am. Journ. Conch, iii. p. 186, 1867. 

 Cuma ledum Gabb and Guppy, not Wood or Kiener. 



Miocene of Santo Domingo and of New Jersey (Shiloh). 



In examining Gabb's types I found that his Fasciolaria Woodii is an un- 

 questionable Ciima, and identical with the species from Santo Domingo which 

 he afterwards erroneously referred to the entirely distinct C. tectum Wood, 

 a West American recent species. 



Subgenus Mazzalina Conrad. 

 Maszalhia Conrad, Journ. Acad. Nat. Sci. ii., vol. iv. p. 295. Type M. pyriila Conrad. 



The type and hitherto unique species and specimen upon which Mr. Con- 

 rad has founded this subgenus is, as Mr.Tryon remarks, very like Lagena, but 

 I regard it as distinct. It seems to me that Mazzalina is a Fasciolaria of 

 short, stout form with supplementary, Latirus-\\V?^ plaits imposed on its colu- 

 mella, while Lagena (Schumacher, Tryon, typified by L. sviaragditla L.) is a 

 smooth, bucciniform Leiicozonia. 



The species which Prof Heilprin referred to Mazzalina differs by the ab- 

 sence of the supernumerary plaits and by the superficial coat of enamel by 

 which the whole shell is covered. I have already separated it under the name 

 of Liochlaniys. To make amends I have now two forms to be added to the 

 true Mazzalina, which will make three species in the American Miocene. 



Mazzalina Oweni Dall. 

 Fusiis sp. Owen, Second Geol. Rep. Arkansas, p. 35, plale i.x. fig. i, i860. 



White Bluff, Jefferson Co., Arkansas, Middle Eocene. 



Owen's types were deposited in the National Museum, and are before me 

 as I write. The specimens, except when fully adult, show the plaits on the 

 pillar only to an oblique view, so they do not appear on that figure. When 

 young the species has three plaits on the pillar like Fasciolaria. At the first 

 resting-stage, however, more are added, and thereafter are continuous, increas- 

 ing to eight or nine in the fully mature shell; the surface is much like that of 

 Conrad's type-species, but the shell is smaller and more slender ; the young 

 have the suture crenulated minutely by its being laid on a peripheral crenu- 

 lated keel of the first two or three whorls ; this keel becomes faint and smooth 

 on the later whorls, obscurely indicating a shoulder to the whorls, which num- 

 ber in all about seven, with the outer lip internally callous and li-rate. The 

 nucleus is small and fusoid ; the canal spirally striate externally. The adult 

 measures 34 x 19 mm. ; Owen's figure is somewhat too slender. It is doubtless 

 the species referred to on page 35 as Fiisiis Fittoni (Lea), to which it bears a 

 considerable but wholly superficial resemblance. Most of the specimens are 

 obscurely constricted between the suture and the shoulder, which is not well 



