﻿50 MR. E. S. COBBOLD ON TRILOBITES VROM [Feb. I9IO, 



■ Mohicana clavata, gen. et sp. nov. — Uppermost band of the grey limestone, 



Comley. (See pp. 46-47.) 

 Fig. 5. Glabella and fixed cheek [586] : from above, from the left, and 



in section across the middle of the head X 3 ; and of the natural 



size from above. 



6. Surface of the test of the same specimen [586], enlarged to about 



10 diameters. 



7. Free cheek [584] X 3 and of the natural size. 



8. Surface of the test of the same specimen [584], enlarged 4 o about 



10 diameters. 



9. Fixed cheek and eye-lobe [582], doubtfully referred to this species, 



X 3 and of the natural size. 



Plate VII. 



Protoleniis latouchei, sp. nov. — Uppermost band of the grey limestone, 

 Comley. (See pp. 42-43.) 



Fig. 1. Part of left free cheek and genal spine [549]; X 3 and of the 

 natural size. 



2. Cranidium [524] : from above, from behind, and from the right X 3 ; 



and of the natural size from above. 



3. Right free cheek [438] ; X 3 and of the natural size. 



4. Part of cranidium [525], showing frontal limb: from above and from 



the right X 3 ; and of the natural size from above. 



5. Right fixed cheek [524], showing eye-lobe and facial suture : from 



above X 3 and of the natural size. 



6. Glabella, occipital ring, and frontal limb [533] : from above X 3 and 



of the natural size ; with enlargements (a) of front border, and (b) of 

 a glabellar lobe, to show the surface-characters. 



Trotolenus morpheas, sp. nov.— Uppermost band of the grey limestone, 

 Comley. (See p. 44.) 



Fig. 7. Cranidium [566] : from above, from behind, and from the right X 3 ; 

 and of the natural size from above. 



Micmacca (?) ellipsocephaloides, sp. nov. (see also PI. VIII). — Olenellus Lime- 

 stone, Comley. (See pp. 27-28.) 



Fig. 8. Cranidium [413], test well preserved : from above, from behind, and 

 from the right X 3 ; and of the natural size from above. 

 9. Cranidium [J 12905, Brit. Mus. (Nat. Hist.) Coll.], test a little 

 weathered, and presenting a beautiful white egg-shell appearance : 

 from above, from behind, and from the right X 3. 



Plate VIII. 



Micmacca ellipsocephaloides, sp. nov. and varieties. (See pp. 27 ct seqq.) 



Fig. 1. The type form [200], test partly destroyed : from above, from 

 behind, and from the right X 3; and of the natural size from above. 



2. Var. senior, nov. [J 12901, Brit. Mus. Coll.], all features much 



thickened, facial sutures convergent forwards, divergent backwards : 

 from above, from behind, and from the right X 3. (See p. 29.) 



3. Var. strenuelloides, nov. [J 12902, Brit. Mus. Coll.] ; frontal limb 



produced, facial sutures more convergent forwards and divergent 

 backwards: from above, from behind, and from the right X 3. 



4. Fixed cheek [J 12902, Brit. Mus. Coll.] : facial suture intermediate 



between the type and fig. 3 ; X 3. (See p. 29.) 



5. Var. spinosa, nov. [J 12900, Brit. Mus. Coll.] : frontal limb short, 



occipital ring produced to a short spine ; X 3. (See pp. 28-29.) 



6. Var. strenuelloides, nov. [J 12904, Brit. Mus. Coll.] : cranidium and 



traces of seven thoracic segments ; facial sutures somewhat con- 

 vergent forwards, glabella somewhat conical ; from above, from 

 the back of the head, and from the right X 3. (See p. 29.) 



