The Cumace.a of the Puriiau Expedition. 413 



, . , , ,, T^ •. Species obtained by the Helga off 



Species obtamed by the Puntan near ^^^ ^^^^ ^^ ^^,^^^^^^ 



Capri. Depth 100-1200 metres. ^^^^^^ 50-382 fath. (about 90-700 metres). 



Diastylis insignis . . . . . . Diastylis insignis. 



capreensis n. sp. 



tuhulieauda. 



Diastyloides serrata Diastyloides serrata. 



biplicata. 

 sp. 



Leptostylis maci'ura Leptostylis macrura. 



loìigìniana. 

 Diastylopsis sp Diastijlopsis sp. 



It will be seen from this table tbat, of tbe 25 species reeorded 



from depths exceeding 100 metres iu tbe Mediterranean , 15 occur 



ut correspondiiig deptbs off tbe West of Ireland. Tbere is little 



doubt tbat furtber collecting will add considerably to tbe iiumber 



of species common to botb regious. At tbe same time tbe amouiit 



of collecting whicb bas been done off tbe Irisb coast is sufficient 



to make it probable tbat no very common and generally distributed 



species bas been overlooked. It is for tbis reason tbat 1 would 



attacb special importance to the cases of species occurring in tbe 



Mediterranean wbicb bave not been taken off' tbe Irisb coast. Of 



tbese, Leucon longirostris^ wbicb is one of tbe most abundant species 



in tbe present collection, bas previously been reeorded from off tbe 



coast of Portugal and from tbe entrance to Davis Straits. It bas 



not been found bitberto, bowever, at deptbs lesa than 500 fatboms 



(about 900 metres) and as the Helga collection s examined by me did 



not extend below 400 fatboms it is possible tbat its special habitat 



bad not been reached. Apart from tbis and from tbe new species, 



wbicb may be found bereafter to bave a wider distribution, tbe only 



species occurring in tbe Puritan but not in tbe Helga coUections are 



Nannastacus longirostris and Campylaspis macrophthalma. Neitber 



of tbese bas bitberto been found elsewbere than in the Mediterranean. 



Botb were obtained in comparatively sballow water (100 — 200 metres) 



and it is quite probable tbat they bave a less extensive ränge than 



bave tbe species from deeper vrater. 



Tbe types of the new species described in tbis paper bave been 

 presented by Dr. Anton Dohrn to tbe British Museum (Naturai 

 History). 



28* 



