880 MR. DOBSON ON A COLLECTION OF CHIROPTERA. [Nov. 5, 



Rhynchonycteris naso, "Wied. 

 Cayenne (M. Melinon). 



NOCTILIO LEPORINUS- 



Cayenne (M. MSlinon). 



SCHIZOSTOMA BRACHYOTE, n. Sp. 



Muzzle as long, or slightly longer than the distance between the 

 eyes ; side of the face deeply grooved beneath the eye. Ear much 

 shorter than the head, but broad at the base, owing to the strong 

 convexity of the inner margin of the conch in its lower two thirds ; 

 at the upper third the inner margin becomes abruptly concave, and 

 the ear terminates in a short, obtusely pointed tip : tragus simple. 

 Nose-leaf small, the lancet very acute, but much narrower than the 

 horse-shoe, which is slightly notched on either side, and confluent 

 with the muzzle in front. Centre of the upper lip slightly grooved ; 

 lower lip with a shallow narrow groove between two naked promi- 

 nences, each of which is divided in its upper third by a small oblique 

 groove. 



Wings from the ankles or from the extremities of the tibiae ; inter- 

 femoral membrane and tail as in other species of the genus ; calca- 

 neum slightly longer than the foot. Fur brown, above and beneath. 



Dentition. — Inc. j; c. j^ ; pm. g^; m. 3 ^ 



Upper incisors as in Sch. megalotis ; lower equal, grooved, not 

 crowded ; first upper premolar with a very oblique cusp, touching 

 the canine, second straight ; first lower premolar much exceeding the 

 second in antero-posterior diameter ; second premolar well developed, 

 in the tooth-row ; third premolar nearly equal to the first in vertical 

 extent, but less than it in cross section at the base. 



Length (of an adult S), head and body2""2; interfemoral mem- 

 brane 0"-9; head 0"'9 ; ear 0"-65X0"5, tragus 0"*28 ; nose-leaf 

 0" - 3x0"'2; forearm l"-6; thumb 0""35 ; third finger — metacarp. 

 l"-4, 1st ph. 0"-55, 2nd ph. 0"7, 3rd ph. 0"-35 ; fifth finger— 

 metacarp. l"-35, 1st ph. 0"-42, 2nd ph. 0"45 ; tibia 0"*65; calca- 

 neum 0"'45 ; foot 0"4. 



Hab. Cayenne (M. Melinon). 



This is a very aberrant form, differing from all the other species 

 in the development of the chin-warts, and in the shallowness of the 

 central groove between them, as well as in the shortness and peculiar 

 shape of the ears. In the second phalanx of the middle finger 

 being conspicuously longer than the first, it agrees with Sch. behni ; 

 but, unlike that species, it has the calcaneum longer than the foot. 



Carollia brevicatjda, "Wied. 



Darien (Dr. Viguier) ; Cayenne (M. Melinon). 



Artibeus quadrivittatus, Peters. 

 Cayenne (M. Melinon). 



