OCR Text |
Show 388 MR. G. E. DOBSON ON THE GENUS CHALINOLOBUS. [June 1, line drawn from the middle of the humerus to the middle of the femur, and upon the interfemoral triangularly as far as the end of the third caudal vertebra. Beneath, the wing-membrane is covered as far as a line drawn from the elbow to the knee-joint, and a few thinly spread hairs are ranged in short parallel rows on the membrane posterior to the elbow and forearm. Teeth similar to those of C. argentatus, but not so slender, and the upper incisors are more inclined inwards and have the small projection on their outward sides near their extremities. Length (total) about 3 inches, of which the tail appears to measure half; ear 0"*4, tragus 0"'l6x0"*08; forearm 1"*5; thumb 0"*23; second finger-metacarp. 1"*5, 1st ph. 0"*5, 2nd ph. 1"*0; third finger-metacarp. l"*4, 1st. ph. 0"-35, 2nd ph. 0"*45 ; fourth finger-metacarp. 1"*25, 1st ph. 0"*3, 2nd ph. 0"*3 ; tibia 0"*63 ; foot and claws 0"*28. Hab. Femando-Po Island, west coast of Africa. This species resembles C. argentatus, but is at once distinguished by the presence of a postcalcaneal lobe, and by its smaller size. CHALINOLOBUS VARIEGATUS. Scotophilus variegatus, Tomes, P. Z. S. 1861, p. 36*. Closely allied to C. argentatus, which it resembles in general form, in size, and in the colour of the fur. It is, however, readily distinguished by the shortness of the lobule at the base of the inner side of the ear-conch, and by the lower incisors, which are crowded between the canines and placed at right angles to the direction of the jaw. The teeth are similar to those of C. poensis, not slender and extremely acute as in C. argentatus; and this condition is present in immature specimens also, so that the comparative bluntness of the teeth is not due to age. The head is also longer, the ears larger, and the face is covered with hair to within a short distance from the end of the nose. The lobes of the lower lip are smaller, and the under surface of the lower jaw not raised on the sides as in C. argentatus. The calcaneum is quite similar to that of C. argentatus ; and there is no postcalcaneal lobe. I have examiued the type specimen of this species, and find that the postcalcaneal lobe described by Tomes has been produced by distortion in drying. Length (of a cS preserved in alcohol) 1"*9; tail 1"*8; head 0"*65; ear U"*6, tragus 0"*22; forearm 1"*55; thumb 0"*3; 2nd finger- metacarp. l"*4, 1st ph. 0"*6, 2nd ph. 1"*0; 4th finger-metacarp. l"-3, 1st ph. 0"*3, 2nd ph. 0"*3 ; tibia 0"*7; foot and claws 0"*3. Hab. Otjoro, S.W. Africa. * The type of this species from Mr. Tomes's collection (and also a duplicate in alcohol) is preserved in the Berlin Museum, which I have lately visited; and Prof. Peters has most kindly afforded m e every opportunity for examining the invaluable collection of Chiroptera, which has been brought together from all parts of the world by his unwearied exertions. |