4 BOVALLIUS, A NEW SAVEDISII ISOPOD. 



by the form of the moutli organ. The general habitus how- 

 ever, the waut of eycs, and the length of the walkiug Icgs 

 poiut to the new form 1 am going to dcscribe. 



Such l)eing the case it would perhaps be most rational 

 to establish a new genus for the animal in qucstion; but, as 

 in many of its essential characters it agrees with Rocinela, I 

 prefer to unite it with that genus, until we shall have got 

 further notices about Harponyx. 



Rocinela Lilljeborgii. u. sp. 



Diagii. (Jorpus leniter convexum, pereion dilatatuin, pleoii angustuin. 

 Fruns piosiliens, rostrum deplanaturn formans, dimidimn 



articuli basilaris antennarum primi paris obtegens. 

 Oculi desunt. 

 Antennce pjnmi paris breves, scapo triarticulato, flagello sex- 



articulato, segmentum primum pcreii vix attingentes. 

 Antennce secundi paris longsii, flagello XXI-articulato, dimi- 



dium segmenti tertii superantes. 

 iSegmentnm primum pereii sequentibus longius. 

 Epimera segmenti secundi, tertii, sexti atque septimi magna, 



epimera segmenti quarti et quinti parva. 

 Pedes prensorii fortissimi, breviusculi. 

 Pedcs gressorii longissimi, setis spinisque instructi. 

 Pleon angustum, lineare, pedibus magnis ciliatis, segmentum 



ultimum praicedcntibus longius. 

 Urus quam pleon longior, lingulatus, marginibus, sctibus in- 



structis, non serratis. 

 Uropoda laminis longis lanceolatis, setosis, non serratis. 



The body is not very convex, somewhat depressed. The 

 pereion is broader than the pleon, ovate; the pleon is narrow 

 and linear. The head wants any traces whatever of eyes; its 

 surface is exactly as smooth and of the same colour as the first 

 segment of the pereion. The front margin projects into a short 

 flattened rostrum, concealing the basal part of the lirst joint 

 of the upper antennas. The upper antennas are short, with 

 three-jointed pcduncle and six-jointed flagellum, reaching 

 backwards to the hinder margin of the head. The second 

 pair of antennas are much longer, reaching to the middle of 

 the third segment of the pereion; the llagcUum is uncom- 

 monly multiarticulate, the artides being twenty-one. The 

 first segment of the pereion is the longest, the two last ones 

 are longer than tlic prcceding ones. The epimerals of the 



