464 Miscellaneous, 



and third joints short, the second the longest ; fourth rather stout, 

 and as long as second and third united ; fifth and sixth slender, 

 and about the length of fourth ; seventh very short ; eighth con- 

 vex on outer margin, straight on inner, vpith a fev^ short hairs 

 scattered along both margins. A sinffle claw at the extremity, 

 which, when pressed against the limb, reaches to junction of 

 seventh joint. Foot-jaws long and slender, projecting consider- 

 ably beyond end of rostrum. Anterior portion of thorax attenu- 

 ated, and advanced to nearly on a line with the tip of rostrum, 

 where it slightly bulges, and gives origin to foot-jaws ; imme- 

 diately behind which is seated the oculiferous tubercle, which is 

 long and narrow. Abdomen long, rounded at apex, slightly taper- 

 ing to base. At the origin of each leg on the dorsal aspect is a 

 large wart-like protuberance. 



One female of this species was taken near the Dogger Bank, in 

 25-30 fathoms, on an oozy bottom. 



Nymphon brevirostre, n. sp., Hodge. 



Rostrum short and stout ; foot-jaws thick, divergent ; second joint 

 or hand nearly as long as first ; palpi five-jointed, brush-like ; first 

 and second joints long and nearly of the same length, each of 

 which is equal to the three terminal, the last being the shortest. 

 Thorax robust. Abdomen stout and conical. Oculiferous tubercle 

 midway between first pair of legs. Legs stout, sparingly furnished 

 with stout spine-like hairs ; first and third joints short ; second 

 slender at origin, but swelling upwards ; fourth and fifth each as 

 long as the three first ; sixth much longer, slender ; seventh short ; 

 eighth long, slightly bent, and furnished along its inner margin 

 with a few short spines, and terminating in one moderately large 

 claw and two small ones. 



One female of this species was taken near the Dogger Bank, under 

 the same circumstances as the foregoing. — Trans. Tynes. Nat. Field 

 Club, 1863, p. 281. 



On the Change in Form of the Teeth of the Susu (Platanista). 

 By Dr. J. £. Gray, F.R.S. &c. 



The front of the beak, in the younger specimens, is dilated and ob- 

 long, but it gradually becomes as compressed as the rest of the beak ; 

 and in the older specimens the end of the beak is turned up. 



The teeth in the front half of the younger specimens are very long, 

 slender, subcylindrical, slightly arched, and more or less flattened on 

 the front and hinder side by the friction of the teeth of the other 

 jaw, which alternate and fit between them when the jaws are closed. 

 The hinder teeth of the animal at this age are short and cylindrical, 

 with a conical end ; the hindermost ones are very short, scarcely 

 raised above the gums. 



As the animal increases in age, the bases of the teeth increase in 

 longitudinal diameter, and the apices become worn off, imtil they be- 



