86 Rev. T. Hincks's Contributions towards a 



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

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

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

 canthiis rostralis, and a brown black-edged streak fi'om the 

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

 and lower parts cream-coloured. 



millim. millim. 



Total length 348 320 



Head 18 17 



VVidth of bead 10 9 



Body GO 63 



Fore limb 33 32 



llind limb o2 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 Riacho 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 interesting lizaid. 



XII. — Contrihutions towards a General History of the Marine 

 Polyzoa^ 1880-91. — Appendix. By the Rev. Thomas 

 HiNCKS, B.A., F.R.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 crassimarginata, sp. n. 



Busk has identified this species with a form which occurs 

 in the 'Challenger' collection t ; but there are important 

 differences between the two, and alter an examination of the 

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



• Reference is made to the number of the ' Aunals ' in which the paiuT 

 appeared and to the pairing of the separate copies. 



t 'Challenger' Report un the Tulyzoa, pt. i. p. (m. pi. .\v. ti^;.. 3, 5. 



