86 Hev. T. Hincks's Contributions towards a ' 



with uniform, imbricate, keeled scales. Pale brown above, 

 with a darker broad dorsal stripe, which may be edged on 

 each side by a fine blackish line ; a blackish streak on the 

 cautlms rostralis, and a brown black-edged streak from the 

 eye to the neck, passing through the tympanum ; upper lip 

 and lower parts cream-coloured. 



6. ?, 



millim. ruillim. 



Total length 348 320 



Head 18 17 



Width of head 10 



Body GO 03 



Fore limb 33 32 



Hiud limb 52 50 



Tail 270 240 



Four specimens have been submitted to me by Professor 

 Liitken, one of which I have been permitted to retain for the 

 British Museum. They are from E.iacho del Oro, Argen- 

 tina, obtained in 1887 by Mr. W. Sorensen. 



I beg to record my best thanks to Professor Liitken for 

 his courtesy in allowing me to describe this ijiteresting lizaid. 



XII. — ContriJjutions towards a General History of the Marine 

 Polyzoaj 1880-91. — Appetidi'x. By the Eev. Thomas 

 HiNCKS, B.A., F.K.S. 



In the following Appendix such errors as have been noticed 

 in the series of papers which it brings to a close are corrected, 

 and at the same time any changes rendered necessary by the 

 progress of investigation have been introduced. But the dis- 

 cussion of a number of systematic and other questions, 

 suggested by the papers, must be reserved for a future 

 occasion. 



' Annals,' July 1880 (p. 3 sep.) *. 

 Memhranipora crass imarginata, sp. n. 



Busk has identified this species with a form which occurs 

 in the ' Challenger ' collection f ; but there are important 

 differences between the two, and after an examination of the 

 * Challenger ' specimens I have little doubt that they must be 



* Reference is made to the number of the ' Annals ' in which the paper 

 appeared and to the paging of the separate copies. 



t ' Challenger' Report on the Polyzoa, pt. i. p. G3, pi. xv. figs. 3, 5. 



