Miscellaneous. 169 



2. " Note on the Occurrence of a new Species of Iguanodon in 

 the Kimmeridge Clay at Cumnor Hurst, three miles west of Oxford." 

 By Prof. J. Prestwich, M.A., E.K.S., F.G.S. 



The pit in which the occurrence of Iguanodon was discovered was 

 worked in Kimmeridge Clay at the foot of an outlying mass of 

 Lower Greensand forming an isolated hill. The Portland beds, 

 which occur at Shotover, are here wanting. The bones were found 

 in a thin sandy seam intercalated in the clay, and traversing the 

 hill, at least 15 feet below the Greensand. The skeleton was 

 probably almost entire ; but, as attention was not directed to it 

 until nearly all the clay had been removed, many bones were lost 

 and others injured. Several vertebras of Ichthyosaurus were found 

 in the same seam, and the characteristic Qryphoea virgula occurred 

 in profusion. The clay above and below contained fossils of Kim- 

 meridge types. The author stated his opinion that land probably 

 lay to the south-west of the Oxford district. 



3. " On Iguanodon Preshvichii, a new Species from the Kimme- 

 ridge Clay." By J. W. Hulke, Esq., F.R.S., F.G.S. 



In this paper the author described in detail the remains of 

 Iguanodon found at Cumnor Hurst in the Kimmeridge Clay, as 

 described in the preceding paper. They illustrated nearly every 

 part of the skeleton of an immature individual, adding greatly to 

 our knowledge of the variation of the vertebrae in the several 

 regions of the vertebral column, and of the structure of the head 

 and hind limbs. In the latter, both the tibia and the fibula arti- 

 culate (as in embryo birds) with the os calcis, which bone is now 

 first identified in Iguanodon. The sacral vertebra? were only four 

 in number ; and the species further differed from the Wealden 

 Iguanodon Mantelli in the simpler character of the serration of the 

 teeth, of which the lamellae are not mamillated, and in having 

 the vertebrae of the trunk and sacrum not so compressed. The 

 author named the species Iguanodon Prestwichii. 



MISCELLANEOUS. 



On the Organization and Development of the Gordii. 

 By M. A. Villot. 



In again treating of this interesting subject, which has constantly 

 occupied me for tbe last eight years, I propose to make known cer- 

 tain facts which had escaped my former observations, and to remove 

 the doubts which the latter have left in the minds of several 

 naturalists. 



The detailed descriptions and the figures that I have given of the 

 first larval form of Qordius have been recognized as correct by the 

 observers who have followed me. I have, however, an omission to 

 make good. I forgot to say, in my monograph, that the three styles 

 with which the trunk is armed are moved by the same number of 



