Some Results of Indian Dredging. 471 



with ecru-drab. The drab is only visible in certain lights. 

 Underparts broccoli-brown, strongly washed with ecru-drab. 

 Throughout the body the hairs are whitish smoke-grey at 

 base. 



Skull. — Notwithstanding its size, less than that of Nycti- 

 nomus europs or N. brasiliensis, the skull of Promops nanus 

 closely resembles that of P. glaucinus. The brain-case is 

 relatively larger and less angular, and the basisphenoid pits 

 are actually larger. Bony palate entire anteriorly. 



Teeth. — The teeth throughout are similar to those of Pro- 

 mops glaucinus, except that the upper incisors do not quite 

 come in contact with the canines and the posterior molar, 

 both above and below, is relatively larger and better deve- 

 loped. The third upper molar contains a small but distinct 

 metacone, a cusp that is lacking in the corresponding tooth of 

 Promops glaucinus. Similarly, the third lower molar is 

 provided with an entaconid of considerably greater relative 

 size than that of the corresponding tooth in the larger species. 

 Hypocone of first and second upper molars as in Promops 

 glaucinus. 



Measurements. — External measurements of type : head 

 and body 41 mm.*; tail 34*; tail (free) 15; tibise 11 ; foot 

 7*8 (Q'G); forearm 38; thumb 5-5; second digit 38; third 

 digit 75; fourth digit 58 ; fifth digit 37. The other specimen 

 (a female) is slightly larger; forearm 39'5. 



Cranial measurements of type : greatest length 16*4 mm. ; 

 basal length 15 ; basilar length 13 ; median palatal length 6 ; 

 zygomatic breadth 9*8; least interorbital breadth 3*6; mas- 

 toid breadth 9 ; greatest breadth of brain-case above roots of 

 zygomata 8 ; lachrymal breadth 5 ; mandible 11*6 ; maxillary 

 tooth-row (exclusive of incisor) 6*4; mandibular tooth-row 

 (exclusive of incisors) 6'S. 



LXIII. — Natural History Notes from the Royal Indian Marine 

 Survey Ship 'Investigator, Commander T. H. Heming, 

 R.N., commanding. — Series III., No. 4. Some Results of 

 the Dredging Season 1899-1900. By A. F. McArdle, 

 B.A., M.B., Capt. I. M.S., Surgeon-Naturalist to the 

 Survey. 



During the season 1899-1900 the R.I.M.S. 'Investigator' 

 was for the greater part of the time without the services of a 

 Surgeon-Naturalist. At the beginning of April 1900 I joined 



* Collector s measurement. 



