OCR Text |
Show 1873.J DR. J. S. B O W E R B A N K ON T H E SPONGIADcE. 319 ft. in. Height at shoulder 1 11 Length of fore leg 1 4*5 Length from knee to fetlock (metacarpal joint) 0 6*5 Length from fetlock to end of toe 0 3*5 Length of hind leg 1 11 Length from hock to fetlock (metatarsal joint) 0 9*25 Length from fetlock to toe 0 3*25 Length of horn from base to point, measured in a straight line 0 7*25 This Gazelle is distinguished from G. bennetti, 1st, by colour. The face in the Indian Gazelle is nearly uniform rufescent fawn-colour, the parts which are black or blackish in G. fuscifrons being only a little darker than the rest in G. bennetti; the back also in the latter is more rufescent and less yellow, and the hairs are less dense. 2nd, by tbe greater length and more strongly marked annulation of the horns in the female, and by their well-marked curvation forwards towards the extremities. The horns in the female of G. bennetti are smaller than those of the male to a much more marked extent than in G. dorcas ; the new species in this respect agrees probably with the African, and not with the Indian type. From G. dorcas, G. arabica, and all allied forms the present species is also distinguished by the curvature of the horns and tbe coloration, especially of the face, none having such strong dark patches on the forehead and nose. Of the habitat of this Gazelle nothing is known beyond what has been mentioned above. It has probably a wide extension throughout the deserts of Eastern Persia; and perhaps, as suggested above in referring to the notes by Dr. Jerdon on Gazella christii, it may extend into India. It probably, in Eastern Persia, inhabits the flat desert at a comparatively low elevation, whilst G. subgutturosa occurs along the bases of the bills and in the higher valleys. 2. Contributions to a General History of the Spongiadce. By J. S. BOWERBANK, LL.D., F.R.S., &c-Part V* [Received January 3,1873.] (Plates XXVIII.-XXXI.) ISODICTYA MIRABILIS, Bowerbank. (Plate XXVIII.) Sponge virgultose. Surface smooth. Oscula simple, or very slightly elevated; margins thin, disposed laterally. Pores congregated in small pocilla, covered by a radial arrangement of ten conical sacculi, having their apices central and their bases marginal; pocilla and sacculi abundantly spiculous ; porous areas arranged in shallow canaliculi, disposed in short irregular lines, more or less in accordance with the long axis of the sponge, bedded in a densely spiculous * For Part IV. see antea, p. 3. |