POLYMORPHININAE 393 



284. Polymorphina plancii (d'Orbigny) (Plate XII, figs. 24, 25). 



Giittulinii pliiticii, d'Orbigny, 1839, FAM, p. 60, pi. i, fig. 5. 



GiittuUna spicacformis (Roemer), sub Cushman and Ozawa, P, 1930, p. 31, pi. v, figs, i, 2. 



One station: WS 83. 



Two very good specimens from this station, recorded as a separate species, merely 

 because the original record {GiittuUiia plancii) was made by d'Orbigny from the Bay of 

 St Bias in Patagonia where it was described as "rare". 



The largest specimen is 0-35 mm. long, o-i8 mm. broad. 



The Paris Type tube contains two specimens, both rather affected by efflorescence but 

 they were successfully cleaned. One is a fusiform type very much like d'Orbigny 's figure 

 in outline, but more compressed and not exhibiting that inflation of the central chamber 

 which is so strongly brought out in d'Orbigny 's figure. It is noteworthy that his 

 description says only that the characters are " peu convexe, separees par des sutures peu 

 profondes ". The Type specimen agrees therefore with the text much better than it does 

 with the figure. Another specimen in the same tube is Lagena globosa. There appears 

 little doubt that it is the actual specimen from which fig. i on pi. i was drawn 

 According to the text this figure is Globiilino oiistralis, d'Orb. as also figs. 2, 3 and 4, 

 which are true Polymorphinae and not in the least resembling fig. i . It would seem to be 

 a case in which the survival of a Type specimen has justified the artist at the expense of 

 the writer, who in this case are identical. D'Orbigny had two separate organisms, drew 

 them correctly, and then mixed them up. 



Cushman and Ozawa {ut supra) have associated d'Orbigny 's species G. plancii with 

 the earlier P. spicacformis, Roemer (R. 1838, CNTM, p. 386, pi. iii, fig. 31), this pre- 

 sumably on comparison of the figure, as Roemer's species has inflated chambers and 

 sunken sutures like d'Orbigny 's drawing, but not like his type specimen. 



285. Polymorphina williamsoni, Terquem (Plate XII, figs. 26-28). 



Polymorphina lactea var. obloiga, Williamson, 1858, RFGB, p. 71, pi. vi, figs. 149, 149 a. 



Polymorphina uiUiamsoni, Terquem, 1878, FIR, p. 37. 



Polymorphina oblonga, Heron-Allen and Earland, 1913, CI, p. 100, pi. viii, fig. 17. 



Polymorphina icilliamsoni, Heron-Allen and Earland, 1930, FPD, p. 175. 



Sigmomorphina williamsoni (Terquem), Cushman and Ozawa, 1930, P, p. 139, pi. xxxviii, 



figs- 3. 4- 



Five stations: 388; WS 83, 88, 92, 408. 



Except at 388 and WS 88 and 92, the specimens are very small, and have an entoso- 

 lenian tube in the final chamber. At WS 88, some very large specimens were found, and, 

 at the same station, a small hyaline individual, furnished with a globular accessory 

 chamber attached to the final one (fig. 28) . A similar variation was figured by Millett (M . 

 1898, etc., FM, 1903, p. 262, pi. V, fig. 5), who described it as " evidently a monstrosity ", 

 otherwise the specimens would have to be ascribed to the genus Dimorphina . Sidebottom 

 having found a few similar growths held the view that it could no longer be regarded as a 



