456 Mr. C. Spence Bate on the British Diastylidse. 



friend W. Webster, Esq., and have taken it myself from the 

 refuse of the trawlers in the neighbourhood of Plymouth. 



Genus Cuma. 

 Cancer, Montagu. 



Cuma, Edwards, Ann. Sc. Nat. ; Goodsir, Edin. New Phil. Journ. 

 1843; Kroyer, Voyages en Scand. 



Carapace with the lateral angles meeting in front of the con- 

 fluent eye and the antennal segments, but not produced ante- 

 riorly into a rostrum-like projection. The lower anterior margin 

 not generally receding. Four segments of the thorax complete, 

 and exposed behind the carapace. The upper antennce " single- 

 jointed and scalelike " {Goodsir) ; the loiver short and unimport- 

 ant, reaching not far in advance of the carapace. Abdomen 

 without appendages to the Jive anterior segments, sixth with 

 double branched stylets, seventh or telso?i absent. 



Cuma scorpioides. PI. XIV. fig. ii. 



Cancer scorpioides, Montagu, Linn. Trans, vol. ix. 



Cuma Audouinii, Edwards, Ann. Sc. Nat. ; Goodsir, Edin. New Phil. 



Journ. 1843. 

 Edwardsii, Goodsir, Edin. New Phil. Journ. 1843. 



This animal has been described by Edwards and Goodsir. I 

 have received but a single specimen, and that, taken in the 

 Moray Frith by the Rev. Geo. Gordon, from which the present 

 drawing was made *. Mr. Goodsir was more fortunate, having 

 captured many, some carrying spawn. He has imagined that 

 there were two species among them, but I am inclined to think 

 that neither his figures nor his descriptions support this conclu- 

 sion, and I believe them to have been mere varieties of the species 

 described in the ' Annales des Sciences Naturelles,^ vol. xiii., by 

 Dr. Milne-Edwards, and that the whole, as also the one from 

 which my own figure has been taken, are identical with the 

 species found by Montagu and figured by him in the Linnsean 

 Society's ' Transactions,' and still preserved in his collection in 

 the British Museum. 



Upper antennse "rhomboidal" {Goodsir); lower very short, 

 terminating but a little in advance of the carapace. The lateral 

 angles of the carapace meeting in front of the antennal segments, 

 but not culminating to a rostrum-like projection. A lateral ridge 

 extends on either side from the posterior margin nearly to a level 

 with the eye. Eyes confluent, and apparently a single organ. 

 Thoracic feet furnished with a palpe. Telson rudimentary. 



* Not wishing to destroy the only specimen that I have seen, I am not 

 enabled to examine the animal by dissection ; therefore my description is 

 taken from the perfect creature. 



