1,X|) C'OPEPOPA. 



ALTKUTHA INTERRUPT A (( ioodsir) . 



1880. Pt'ltiiUum iitterniptiim, Brady, vol. ii. p. 162, pl.lxxi. figs. 4-15. 

 1904. Alleutka wtemipt.it, G. 0. Sars, p. 02, pis. xxxvi., xxxvii. 



This is Altentlia lopyroides, Glaus, Alteutha norvegica, 

 Boeck, and Peltidium conoplion.mi, Poppe. 

 Not common ; Starcross and Plymouth. 



EUPELTE PURPUROCINCTA (Norman). 



1869. Alteutha purpurocincta, Norman, Brit. Assoc. Kept, for 1868, 



p. 298. 

 1880. Peltidium depression, Brady, vol. ii. p. 160, pi. Ixxn. 



figs. 1-5. 

 1904. Alteutha depressa, G. 0. Sars, p. 64, pi. xxxvm. 



Taken very sparingly at Starcross and Extnouth, and also 

 in Plymouth Sound. 



PELTIDIUM PURPUREUM, Philippi. 



1839. Peltidium purpurevm, Philippi, Archiv f. Naturgesch. Jahrg. 5, 

 p. 131, pi. iv. tigs. 12, 13. 



1904. Peltidium purpureum, G. 0. Sars, p. 66, pis. xxxix., xl. 



A single specimen of this rare species was obtained in a 

 tow-net gathering from Salcombe, collected July 2nd, 1875. 



PELTIDIUM CONSPICUUM, Norman & T. Scott. (Pis. XI. fig. 9 ; 

 XIV. fig. 11; XV. fig. 6; XIX. fig. 4.) 



1905. Peltidium conspicuum, Norman & Scott, Ann. & Mag. Nat. 

 Hist. ser. 7, vol. xv. p. 296. 



A single specimen of a Peltidium which appears to be 

 nndescribed was obtained in New Grimsby Harbour, Scilly 

 Islands, on 23rd May, 1903. It was of a uniform dark 

 purplish or ruby colour, and was therefore quite a con- 

 spicuous object in the gathering in which it occurred. 



P. conspicuum has a general resemblance to P. purpureum, 

 but is rather larger, and the carapace wants the pellucid areas 

 so characteristic of that species, but is on the contrary of a 

 uniformly dense colour. 



It measures about 1'3 mm. (^got an inch) in length. The 

 rostrum is broadly truncated, not much produced, and has 

 the anterior truncated edge obscurely tridentate. Figure 4, 

 PI. XIX., shows a dorsal view of the specimen. 



The antennules are short, moderately stout, and composed 

 of six joints ; the first three joints, which are subequal, are 

 together about twice the entire length of the last three ; the 

 penultimate joint is very small (PI. XV. fig. G). 



