ZOOLOGICAL AND BOTANICAL ASSOCIATION. 47 



and the anterior edge is very sinuous. All the plates are supplied with 

 a well-marked median carina, and appear to have been without apo- 

 physes. The surface is covered with a small number of deep equidis- 

 tant stria). The test is slender. The median area is larger than the 

 lateral one. 



Relations and differences. — This Chiton very much resembles C. Lof- 

 tusianus, King, but differs from it in the regularity of the striae of the 

 median and lateral areas, and by the more marked sinuosity of the ante- 

 rior edge of its plates. 



Dimensions. — The length of each dorsal plate is about 8 m illimetres 

 and the breadth 12 mm. 



Locality. — This species was found by Mr. Gray with the preceding 

 one ; it is, however, scarcer even than that. 



EXPLANATION OP PLATE I. 



Fig. la, Chiton Gray anus, De Kon., nat. size, with fragments of four 

 dorsal plates, from the collection of Mr. Gray ; 1 b, a plate, seen from 

 the anterior side; \c, half plate, enlarged; Id, complete specimen 

 hypothetically restored, and slightly enlarged. 



Fig. 2a, Chiton Wrightianus, Do Kon., nat. size, showing two doraal 

 plates compressed ; 2b, dorsal plate, seen on the posterior side ; 2c, 

 restored specimen, taking as a base the Chiton Zoftusianus. 



NOTES ON DTTNLOPEA. 



Dr. E. Perceval "Wright exhibited to the meeting an annulose ani- 

 mal, which had been taken in India by Mr. Dunlop, one of their Asso- 

 ciate Members, and which he believed to belong to a new order of the 

 group Turbellaria, — the straight alimentary canal and the absence of the 

 anal orifice reminding one of the Rhabdoccela ; while the apparent ab- 

 sence of cilia, and the peculiar worm-like form, give the animal a very 

 Helminthoid appearance. Dr. Wright proposed to lay before the Lin- 

 naean Society a full account of this curious creature, when he would 

 fully discuss the question of its proper position among the Annuloida; for 

 the present, he would propose to name the genus after [his friend A. 

 Dunlop, Esq. It may be briefly characterized as follows : — 



Dunlopia (nov. gen,) 

 Body flattened, ribbon-like, transversely wrinkled, one portion gra- 

 dually tapering to a tail-like extremity, the other tapering but slightly, 



