ANCEUS MAXILLARIS. ]95 



We have no hesitation in referring the animals above 

 described to the Cancer maxillaris of Montagu. His 

 description is indeed very concise, and his figure very 

 rude, but an examination of the specimens preserved 

 in the British Museum Collection leave no doubt on 

 this point, all the males having the notch on the outer 

 edge of the mandibles, forming a small tooth. 



Our specimens, moreover, have been found in con- 

 siderable numbers along the Devonshire coast, in Mon- 

 tagu's localities. We are also able to state that Mr. 

 Montagu was acquainted with the fully developed female, 

 from an examination of his series of original drawings 

 now in the hands of Mr. Parfitt of Exeter ; whence we 

 further learn that Montagu's variety of his Oniscus 

 cceruleatus, having the body white, with the head, 

 pereion, and pleon maculated with yellow (which 

 Montagu shrewdly suggested might possibly be a sexual 

 variation), is a fully developed female. The name, there- 

 fore, of Praniza Montagui, which Professor Westwood 

 proposed for this variety, must sink into a synonym. 



Mr. W. P. Cocks found the males in crevices of 

 rocks at extreme low-water mark at Gwyllyn Yase, 

 and in trawl refuse, whilst the Praniza he took most 

 abundantly in the neighbourhood of Falmouth, and a 

 specimen in the British Museum, labelled P. flavus, 

 Bantham, Falmouth, is undoubtedly a female of this 

 species. Montagu only obtained two specimens of his 

 Oniscus caruleatus, which were found adhering to the body 

 of the Father lasher (Coitus scorpius) on the Devonshire 

 coast. The late Mr. W. Thompson's collection also con- 

 tains specimens of the males found amongst dredged 

 matter at Bangor, in Ireland, in the month of August, 

 and also upon Bangor oysters in the month of December. 

 Mr. Norman also communicated to Professor Bell speci- 



o 2 



