-^2 Description oj Genera and Species. 



What appears to be a young specimen of this species, as it is one of several sucli 

 minute forms tliat occur on the same slab as figs. 2, 5, and was also figured by 

 Etheridge,' is shown magnified 15 diameters in fig. 6, M. 4249''. The carapace is larger 

 in proportion to the tail than in the adults. The eyes are particularly large and the ocular 

 papilla very distinct. The keels on both the carapace and tail are very marked, and 

 on the portions visible the characteristic features of the present species are quite 

 apparent. The limbs, however, are all hidden. 



Locality. — Shore near GuUane, Haddingtonshire, and Tweenden -Burn, near New 

 Castleton, Roxburghshire. 



Horizon. — Oil Shale Group, and Cementstone Group, Scottish Calciferous Sandstone 

 Series. 



Collector. — A. Macconochie. 



Tealliocaris woodwardi, var. PI. II., figs. 7-9. -» 



Specimens of a well-marked elongated variety occasionally occur. Fig. 7, 

 R. 1709, represents the back view of the trunk and part of the tail of one specimen, 

 natural size. Fig. 8, R. 1717, shows the same view of both trunk and tail of 

 another specimen, somewhat enlarged. The carapace shows the characteristic longi- 

 tudinal keels all reaching the posterior margin. The eyes, as well as the antennular and 

 antennal system, are also well seen. The tail shows the median ridge upon all its 

 segments, and the telson, its terminal lobe and accessory swimmerets. 



Locality. — Chattlehope, Rede Water, Northumberland. 



Horizon. — Cementstone Group (Tuedian), Scottish Calciferous Sandstone Series ; 

 English Carboniferous Limestone. 



Collector. — J. Rhodes. 



Tealliocaris ETHERinoEi (Peach). PI. III., figs. 1, 2. 



1882. Anthrapalcemon etheridgei B. N. Peach, Trans. Roy. Soc. Edin., vol. xxx., 

 . p. 76, pi. viii., figs. 3-3g. 



The collection contains a large number of specimens of this well-marked species in 

 addition to those figured by me for the original description. The light shed upon this 

 form from the study of the well-preserved specimens of the species already described 

 makes it plain that the present form is another species of the same genus, and that I 



'Quart. Journ. Geol. 8oc., 1879, vol. xxxv., pi. xxiii., fig. 7. 



