68 EXPLANATION OF PLATES. 



Plate 4. 



MONSTRILLA GRANDIS. , 



Fig. I. Male (somewhat distorted) X 4°- 



2. Foot of fourth pair X 84. 



3. Abdomen, a. a. testes X 84. 



HaRPACTICUS GRACILIS. 



4. Female seen from left side X 84. 



5. Abdomen and fifth pair of feet 5 



6. Antennule of female 



7. Posterior footjaw 



8. Foot of first pair 



9. ,, third pair 5 



10. ,, second pair 6 



11. ,, third pair J 



12. ,, fifth pair 5 



Paratachidius inermis. ? 



17. Foot of second pair ^ 



14. „ fifth pair j" ^ ^40. 



X 240. 



Postscript. 



Since the foregoing was in print I find that Mr. T. Scott has noted the 

 occurrence of Monstrilla in the Firth of Forth, and the same observer has 

 also found it — though not as yet recorded — in the Moray Firth. 



Paratachidius (p. 58). 



This generic name was proposed in 1873 (Ann. and Mag. Nat. Hist., 

 ser. iv. , vol. xii., p. 131) by Brady and Robertson, but was afterwards 

 withdrawn as being identical with Mesochra, Boeck. I now propose to 

 restore the name for an allied form — P. inermis. 



