EASTERN PK0V1^C1. INTEiUOLi REGION SPECIES. 235 



acters in the Limaces found witliin our limits. The variation shown in 

 the shell of the helicifoiin genera seems here to be transferred to these 

 organs. It seems to be a generic character that the testicle is com- 

 posed of aciniform cceca, and is not imbedded within one of the lobes 

 of the liver. 



As some confusion exists in regard to the specimens furnishing the 

 descriptions and figures of dentition published in this country, I have 

 taken pains to be sure of the specific identity of each specimen from 

 which my own are drawn. The L. maximus was collected in Newport, 

 E. I., by my friend Mr. Samuel Powel. It is the same individual fig- 

 ured on p. 408 of my edition of Gould's luvertebrata of Massachusetts. 

 The external markings of the animal are conclusive proofs of its identity 

 with the European species. I have, however, made it still more certain 

 by examining the genitalia, which I find agree with thoseof L. maximus 

 figured by Lehmann (Lebenden Schnecken, &c.). I find the dentition 

 agrees also with the figuies given by Heyuemann (Malak. Blatt., X.), 

 Lehmann (/. c), and Goldfuss (Verhl. Natnrh. Vereins der Preuss. 

 Eheinl., &c.) The L. JJavns was collected in a cellar in Burlington, N. J. 

 It not only agrees with the figure in the Terrestrial Mollusks as far as its 

 outward markings are cbncerned, but I find also its genitalia to agree 

 with Dr. Leidy's figure in the same work, and also with the figure given 

 by Moquin-Tandon (Moll. Fr.). Its dentition agrees with the figures of 

 Heynemann and Semper (Arch. Phil.). The L. agresUs was collected 

 in a garden in Burlington, IST. J. This species I have also found to 

 agree with the figures of the external animal and genitalia given in the 

 Terrestrial Mollusks, as well as with Moquin-Tandon's (Moll. Terr. 

 et Fluv. de la France) figure of the genitalia and Heynemann's and 

 Lehmann's figure of the dentition ; also with the figure of the genitalia 

 given by Schmidt and Lehmann. The Limax campestris examined was 

 collected in the country near Burlington, N". J. It agrees with the de- 

 scription and figures in the Terrestrial Mollusks, not only as to its exter- 

 nal characters, but in its genitalia. I will here mention that its denti- 

 tion does not agree with that of L. Weinlandi, Heynemann [l. c, 212), 

 supposed by that author to be the same species. The Umax Hewstoni 

 examined is a typical specimen, given by Dr. J. G. Cooper to the State 

 collection of California. It was labeled by him. There can be no 

 doubt, therefore, of its identity. The Limax montanus examined was 

 one of the original lot found by Mr. Ingersoll, and furnished by him. 

 The Limax occidentalis was received from Dr. Cooper. 



