402 On the Great Rorqual of the Indian Ocean, [No. 5. 



deeper at the symphisis, and therefore undoubtedly appertains to 

 a distinct species. 



Also a skull according with Delphinus ettry^ome, Gray, and 

 another with D. obscuiius, Gray ; which, together with the Red 

 Sea example of Steisto rostratus, were made over to the Society's 

 museum from that of the Calcutta Medical College in 1843. Last- 

 ly, the skull of a Dolphin affined to D. delphis, L., and " procured 

 during the voyage from England to India," J. A. S. XVI, 886. Pre- 

 sented by the late R. W. G. Frith, Esq., and probably an imdescrib- 

 ed species. With a general resemblance to that of D. delphis, the 

 inter-maxillaries — united as far as the middle of the rostrum — are 

 vaulted so that the section of their united middle portion forms a 

 complete semi-circle, rising abruptly from the maxillaries, and being 

 there only as broad as the exposed portion of each maxillary ; pro- 

 bably a distinctive specific character. Teeth ^~ 50 - If confirmed as 

 a new species, D. Frithii, nobis.* 



Of the Gangetic ' Susu' (Platanista gangetica), we have a stuff- 

 ed male, presented by M. Alfred Duvaucel, As. Res. XV. App. xxxii. 

 A stuffed female, and also a stuffed example of a young female, pro- 

 cured by myself. With skulls of adult male and female, the former 

 toothless, and presented by Dr. Y/allich, As. Res. XII, App. xxvi. 

 The entire skeleton I have long been trying to obtain. There is a 

 fine series of skeletons of this species in the museum of the Cal- 

 cutta Medical College. t 



* Since the above was written, Capt. Jethro Fairweather, commanding the 

 ship ' Forfarshire,' has favored us with the skull of a small but not young Ste- 

 NO, which seems to be St. attenuated, Gray. It was procured not far from the 

 Sandheads, out of an innumerable herd of them, " as far as the eye could reach 

 in all directions," and was of a palish lead-colour, — not therefore, however, the 

 D. MALAYANUS v. plumbeus, which is a much larger species common in the Bay. 



pp ., 39-40 

 Teeth 4l= - 4 - 2 



Major E. C. Tytler, also, has presented a skull taken W. of the Cape G-. Hope, 

 which agrees or very nearly so with the two heads minus the teeth and the lower 

 jaw, mentioned in the text. 



f Though abounding in the river Hugh, the c Susu' is extremely difficult to 

 procure, at least in the vicinity of Calcutta ; and too often when a fine example 

 is taken the captors saw off the rostrum, rendering it useless for a museum spe- 



