48 PROCEEDINGS OF THE ACADEMY OF [April, 



marked with some black blotches, but in others there is a pattern of 

 black streaks very much like that of S. ovalis chittenangensis. See PL 

 VII, figs. 9, 10, 11, (No. 90,084, 90,085 A. N. S. P.) 



Succinea ohliqua Say, 1824, also was described from Philadelphia, 

 two cotypes mounted on the cards used by Say, and inscribed with his 

 autograph label, being still preserved. They are photographed in fig. 2. 

 These specimens have the spire longer than in ovalis, the suture more 

 oblique, but are otherwise very similar. They are greenish-yellow, 

 though not quite so green as ovalis, and the abundant series of other 

 Philadelphian specimens before me leaves no doubt that they inter- 

 grade perfectly with Philadelphian ovalis. It will not, I think, be 

 possible to use the name ohliqua in a varietal or subspecific sense, 

 though it might be used to indicate the elongate phase or form which 

 the species often assumes, if a name for that be desired.^ It must be 

 understood, however, that the longer phase occurs with the shorter 

 typical ovalis, and is fully connected therewith by intermediate 

 individuals in the same colonies. 



The synonyms of S. ovalis, and early references thereto discussed 

 above, here follow : 



Succinea ovalis Say, Journ. A. N. S. Phila. I, 1817, p. 15. Ferussac, 

 Tabl. Syst., 1821, p. 26; Hist. Nat. MoU. Terr., PI. XIa, fig. 1 (not S. 

 ovalis Gould). 



Succinea ohliqua Say, Major Long's Second Exped., II, 1824, 260, PL 

 15, fig. 7. DeKay, New York Fauna, Moll., p. 53, PL 4, fig. 53. 

 Binney, Terrestr. Moll., II, p. 69. 



Succinea campestris Gould, Invert, of Mass., 1841, p. 195, fig. 126. 

 DeKay, New York Fauna, Moll., p. 53, PL 4, fig. 54 (not S. campestris 

 Say). 



Succinea totteniana Lea, Proc. Am. Philos. Soc, II, 1841, p. 32. 

 Succinea ovalis optima n. subsp. Fig. 4. 



In many localities from New York to Minnesota and Iowa a form 

 much more robust than typical ovalis is found. The shell has coarser 

 wrinkle sculpture, and yellow predominates rather than green. The 

 contour is about that of the larger examples of ovalis (such as those Say 

 called S. ohliqua), but varies to nearly or quite as broad as typical 

 ovalis. The suture is deep, and at the last whorl oblique. The 

 largest specimens I have seen are from the type locality, Crugers Valley, 

 near Upper Red Hook, Duchess Co., N. Y., collected by Mr. W. S. 

 Teator. Two of them measure : 



^ S. greeri Tryon has been quoted as a synonym of aS. ohliqua, but it is certainly 

 distinct from that species. 



