88 Prof. P. M. Duncan on the 



lower surfaces whitish, largely spotted with black. Head 

 and body 360 raillim. ; tail 90 millim. 

 Two specimens. 



10. Bothrops alternatus, D. & B. 

 Bothrops air ox, Heusel (part. ?). 



*11. Bothrops hiporuSj Cope. 



BATKACHIA. 



*1. Paludicola fuscomaculata (Steind.). 



*2. Limnomedusa macroglossa (D. & B.). 



*3. Phylhmedusa Iheringiiy sp. n. 



Very closely allied to P. Burmeisteriy but the head is 

 smaller, not wider than the body, the snout less oblic[uely 

 truncate, and the parotoids are scarcely prominent. The 

 coloration is also different. Upper surfaces, the digital disks 

 included, green ; concealed parts of the body and limbs 

 bright orange, with dark purple lines forming vertical bars or 

 a wide-meshed network ; a more or less distinct whitish line 

 round the lower jaw and along the outer side of forearm and 

 hand and tarsus and foot ; lower surfaces pale yellowish, or 

 grey spotted with yellowish. Male with an internal subgular 

 vocal sac and blackish rugosities on the thumb. From snout 

 to vent 67 millim. 



Numerous specimens. 



X. — On the '■'■Tag " o/ Coelopleurus Maillardi, Mich. 

 By Prof. P. Maetin Duncan, F.R.S. 



The " tag " of an Urchin is that comparatively bare space 

 on the test which is situated above, that is aborally to, the 

 branchial slit or " cut." 



It is a small, elongate, narrow space just on the edges of 

 an interradium and an ambulacrum, and the ambulacro-inter- 

 radial suture usually runs down it. As there are ten slits or cuts, 

 there may be as many " tags." The structure is by no means 

 universal, and there are groups of genera in which it does 

 not exist. Mr. Percy Sladen and myself found the tag well 



