156 [Feb. 



number of elevated, longitudinal, moderately tortuous, papiUated, linear ridges. 

 Mouth small, round. Gilsophagus long, cylindrical. Intestine simple, tortuous. 

 Anus small, oval, situated about half the length of the alary expansion, from the 

 posterior end. 



Length 11 lines ; breadth 3-5ths of a line. Transverse striae of integument 

 l-6.j0th in. vv^ide. ffisophagus 2i lines long ; l-5th of a line broad. 



Habitation. The description is taken from two males found within the stomach 

 of Didelphis virginiana. 



4. Spiroptera Scalopis canadensis. Body vi^hitish, cylindrical ; anteriorly 

 attenuated ; posteriorly re-curved, furnished at the extremity with a lateral dilated 

 alary expansion, containing four minute respiratory tubes, diverging from the 

 position of the anus. Mouth small. (Esophagus cylindrical ; Intestine mode- 

 rately tortuous. Anus about half the length of the alary expansion from the pos- 

 terior end. 



Length 6 lines ; breadth i of a line. (Esophagus J of a line long. 

 Habitation. Description from a single male found in the stomach of Scalops 

 canadensis. 



5. EcHiNORYNCHus sociALis. Body white, cylindrical, with a dilatation of the 

 anterior fifth ; narrowed posteriorly, with a white spiral band passing around the 

 whole length, and giving the appearance of transverse annulations. Proboscis 

 moderately long, cylindrical, with twenty-six transverse rows of simple re-curve(J 

 booklets, sixteen in each row. 



Male furnished with a posterior vesicular appendage. 



Length from h an in. to 2 in. 4 lines ; breadth of larger individuals anteriorly, 

 f of a line ; posteriorly 2-5ths of a line. 



Habitation. Found frequently in considerable numbers in the intestine of Pla 

 tessa plana. 



The Committee, to whom the paper of Dr Berlandier, read to the 

 Academy Feb llth, 1851, describing two species of Mexican wolves, 

 was referred, reported : 



That after a careful examination, they are satisfied that the first, the Cams 

 Mexicanus of Desmarest, No. 297, and the Lupus Mexicanus of Col. Hamilton 

 Smith, Vol. 9th, Mammalia Nat. Lib., though heretofore considered by Richard- 

 son and others as a variety of the common wolf, Lupus occidentalis, is yet, from 

 its peculiarly marked form, entitled to be considered a distinct species. As this 

 wolf has been described and figured in the work referred to, it would only be 

 unnecessarily multiplying its synonyms to publish a new name for it, unless 

 stronger reasons be given than exist in the present case. The second is unques- 

 tionably the one described by Dr. Woodhouse, under the name of Canis frustror, 

 in a paper read to the Academy, Jan. 7th, 1851, and directed to be published in 

 the Proceedings and in the Journal of the Academy. The same objection, the 

 unnecessary multiplication of synonyms, also applies to the publication of the 

 name given by Dr. Berlandier to this wolf. Although Dr. Woodhouse is entitled 

 by priority of publication to the right of giving the specific name, yet the Com- 

 mittee feel unwilling to report against the publication of this part of the paper, 

 especially as it strongly corroborates the views expressed by them in the remarks 

 made on the Canis frustror. Considering the description of the first also as im- 



