566 Reports and Proceedings — 



slightly recurved at its extremity, and all of the spines annulated, 

 as if composed of a large number of joints. Encrinuri with two 

 (and in one case even with three) dorsal spines have been obtained 

 in considerable numbers, both at Dudley and Malvern, and may be 

 seen in Dr. Grindrod's collection, and in the British Museum and 

 many other places ; but a Trilobite with such an array of long dorsal 

 spines as is presented by this African species is very remarkable, and 

 for an Encrinuriis quite unique. I have named it after its locality 

 E. crista-galli, which is doubly appropriate. (See Proceedings Geol. 

 Soc. Lond., Nov. 20, 1872.) 



Among the specimens sent me up by Mr. Birtwell from Lancashire, 

 from the Ironstone of the Coal-measures (so rich in organic remains), 

 was one not referable to the Crustacea. 



(Jn examination it proves to be a new and very remarkable 

 Arachnide, referable to the same genus as one described by Mr. 

 Samuel Scudder, of Boston, U.S., from the Illinois Coal-field, under 

 the name of Architarhus (see Meek and Worthen's Eeport on the 

 Geology and Palasontology of Illinois). 



I have named it Architarhus suh-ovalis. (See Geol. Mag., 1872, 

 Vol. IX., p. 385, PL IX.) 



This is the second British Arachnide I have lately obtained from 

 the Ironstone of the Coal-measures. 



Tertiary Crustacea. — Some time since I described two new forms 

 of Crabs ^ from the Lower Eocene, Portsmouth, discovered by 

 Messrs. Meyer and Evans in the excavations for the New Docks 

 there. More recently I have received a fresh series, from which 

 I have heen enabled not only to re-figure and to fully describe the 

 species named by me (on December 21st, 1870) as Bhachiosortia 

 hispinosa, and to show both the upper and under side of the male 

 and female, but also to record two additional forms for which I pro- 

 pose the genus Litoricola, naming them respectively L. glabra and 

 L. dentata. These do not belong (like Bhachiosoma) to the Portunidce, 

 but to the Ocypodidcs, or true shore-crabs, their legs being adapted 

 for running, and their eyes furnished with long peduncles.^ (See 

 Proceedings Geol. Soc. Lond., November 20, 1870.) 



This series of Crustacea (though they are exceedingly brittle and 

 delicate) are remarkable for the perfect state of preservation in which 

 they occur, so that we are able, in each case, to restore nearly the entire 

 animal. Of the two new ones, it is interesting to record that they 

 afford evidence of unmistakable land conditions, both of them being 

 shore-dwellers, and adapted for running on the old muddy and 

 aandy beaches of the pre-Eocene Continent. The sections still, I 

 believe, open at Portsmouth, deserve an inspection from all who are 

 interested in the stratigraphical geology of this series of deposits. 



Miocene Crustacea. — Having been requested by Dr. A. Leith 



1 Ehachtosoma hispinosa and jR. echinata. See Quart. Joum. Geol. Soc, 1871, 

 Tol. xxvii., p. 91, pi. iv. 



^ Under the name of Gonioeypoda Edwardsii, I described a true Eocene shore- 

 Grab from the Red Marl of the Plastic Clay, High Cliff, Hampshire, in December, 

 1867. See Geol. Mag., Vol. IV., p. 629, PI. XXI., Fig. 1. 



