LIMN^EA. 



21 



Limncea Jugularis. 



Fig. 29. Adams and DeKay describe Fig. 30. 



appressa as a distinct spe- 

 cies. 



The shell has been figured 

 roughly and described by 

 Dr. Kirtland under the name 

 of L. sfagnalis. I here give 

 a fac-simile of his figure, and 

 a copy of his remarks, omit- 

 ting Dillwyn's words. 



After leaving TrumbuU, we 

 enter Portage County (Oliio). 

 In this county we found a num- 

 ber of beautiful ponds, from 

 each one of which flows a peren- Limnma stagnalis. 

 nial stream. One which lies a 

 few miles south of our route, in Stark County, called Congress Lake, was, 

 until recently, the only known locality of the fine univalve shell, Lininxa 

 staynalis. It was discovered by Dr. K. in the course of the last season. 

 I have one in my possession which is two inches in length, with the body 

 whirl three-fourths of an inch in diameter. As this rare and elegant shell 

 has not been figured or described by any American Conchologist, a draw- 

 ing is given at figure 10. The description is copied from Dillwyn, and 

 appears to be so similar to that of our own shell, that there can be no 

 doubt of its identity with the European species, although it is a rare fact, 

 and which scarcely again occurs in all our long list of land and fresh- 

 water shells. Geoffroy calls it " Le Grand Buccin." (^Kirtland.) 



An anonymous writer in the Canadian Naturalist also refers 

 the shell to stagnalis, giving a copy of a figure of that species in 

 a foreign journal. 



The species has also been described and figured, as the follow- 

 ing copies show, by Rossmassler, under the name of Limnseus 

 spieciosus, Ziegl. Haldeman quotes this description in the 

 synonymy of jugularis, but afterwards refers it to L. appressa. 



Shell imperforate, ovate-conical, with a long turreted acutely terminat- 

 ing spire, yellowish-brown, deeply striated, with very delicate striae under 

 the lens on the whole upper surface ; seven whirls, the last not very ventri- 

 cose, but only slightly arched ; no trace of a margin above ; the upper 

 whirls form a very long and slenderly drawn-out spire ; aperture ovate, 

 acute above, on the left side cut out in a shallow heart shape ; outer lip 

 but slightly prominent, and very delicately imbricated ; the columellar 

 callus is quite thin and adheres so closely as to be distinguished almost 



