LAGENINAE 367 



occurs in company with the much commoner elongated type, first figured by WiUiamson 

 (lit supra) which is dominant at most of the stations. Particularly good at WS 89 and 217. 

 The dimensions vary considerably. Three typical specimens of the d'Orbigny type 

 were, respectively, 0-40, 0-50 and 0-55 mm. long, and 0-26, 0-26 and 0-33 mm. broad. 



189. Lagena sulcata (Walker and Jacob) (Plate X, figs. 13-15). 

 Serpula {Lagena) striata. Walker and Boys, 1784, TMR, p. 2, pi. i, fig. 6. 

 Serpiila (Lagena) striata, Walker and Jacob, 1798, AEM, p. 634, pi. xiv, fig. 5. 

 Lagena sulcata, Brady, 1884, FC, p. 462, pi. Ivii, figs. 23, 26, 33, 34. 



Twenty-one stations : 51, 228, 235, 236, 388 ; WS 71, 79, 83, 88, 89, 90, 91, 92, 210, 213, 221, 225, 

 245, 248, 40S, 433. 



Generally distributed but never very common, and very variable both in the number 

 and development of the costae. At WS 83, 221, 225 and 408, a very curious variety 

 occurs characterized by a long neck, a basal "peg" and a small number (about 12) of 

 very thin but strongly developed costae (Plate X, fig. 13). In a few perfect specimens 

 found at WS 83, every third "costa" is extended in a straight flange up the neck 

 (Plate X, fig. 14), but, as a rule, this delicate ornament is broken away so that in most 

 of the specimens the costae are confined to the globular body. A somewhat similar form 

 is figured by Sidebottom(S. 1912, etc.,LSP, I9i3,p. 173, pl.xv, fig. 24) who compared 

 his specimen with L. alifera, Reuss (R. 1870, FSP, p. 467, v. S. 1870, FSP, pi. iii, 

 figs. 15, 16, 21, 22). This variety usually represents the species in the stations mentioned 

 above. At WS 91 and 245, single specimens of a very extraordinary form, 0-43 mm. long, 

 0-22 mm. broad, in which alternate costae are continued and form prominent flanges 

 running straight up the neck. The flanges are bridged by annular outgrowths forming 

 a ladder-like structure up the neck (Plate X, fig. 15). At 228 and WS 225, the costae 

 are extended almost into wings. 



190. Lagena lyellii (Seguenza). 



Amplwrina lyellii, Seguenza, 1862, FMMM, p. 52, pi. i, fig. 40. 

 Lagena lyellii, Balkwill and Millett, 1884, FG, p. 27, pi. ii, fig. 2. 

 Lagetia lyellii, Heron-Allen and Earland, 1913, CI, p. 79, pi. vi, fig. 8. 



Six stations: 388; WS 83, 89, 93, 221, 245. 



Usually only a single specimen, but with some variation in the strength of the costae. 



191. Lagena vilardeboana (d'Orbigny) (Plate X, figs. 16-18). 

 Oolina vilardeboana, d'Orbigny, 1839, FAM, p. 19, pi. v, figs. 4-5. 



Nineteen stations 148, 51, 53, 388; WS 71, 79, 80, 83, 88, 89, 90, 91, 92,93, 95, 99, 225, 245, 408. 



D'Orbigny 's species has hitherto been regarded as a synonym for L. sulcata and as 

 representing a short-necked variety of that species, a view justly based on the original 

 figure and description, which merely describes a shell with 20-25 well-marked costae. 



But an examination of the Types in Paris disclosed three specimens mounted in the 

 usual tube. One may be summarily dismissed — it is a specimen of L. squamosa (Mon- 

 tagu). How and when it became associated cannot now be stated. The other two speci- 

 mens, while agreeing in general form with d'Orbigny's figure, differ from it in the 



