296 Dr. R. Koehler on the Littoral Fauna of the 



AlgfB in the neighbourhood of Elizabeth Castle. I will 

 mention further Chelura terebrans^ which is associated with 

 Liinnoria. 



The Lseraodipoda are represented bj ProteJla phasma^ Sp. 

 Bate, and Gaprella linearis^ Edw., two species very conunon 

 among plants. 



I must, lastly, cite, to complete the enumeration of the 

 higher Crustacea, Nehalia Geoffroyli^ Edw., common under 

 stones which lie upon mud rich in organic detritus. 



Insecta. 



The number of marine insects at present known is very 

 restricted. We hardly know more than ^pus marinus and 

 Rohinii^ Microlymma brevrpenne^ and Ochthebius Lejolisiij 

 which live on our coasts and really merit the name of marine 

 insects. To these Coleoptera we must add the Hemipteron, 

 jEpopihUas Bonnairei^ Sign., which was discovered only in 

 1879 at the island of Be. It is an extremely rare species, 

 and does not seem to have been luet with again since that 

 time ; nevertheless there is a specimen in the British Museum 

 bearino; "Cornwall" as an indication of orio-in. I have been 

 fortunate enough to find JEpophilus at Jersey, and I col- 

 lected several examples of it, which have enabled me to study 

 this interesting animal with care, and to rectify tlie incorrect 

 interpretation which Signoret had given of the external genital 

 organs. Moreover I have found the larva of this interesting 

 Hemipteron, not in Jersey but in the caves of Gouliot, in the 

 Isle of Sark. 



In November 1885, IMr. Sinel also found in Jersey this 

 same larva of JEpoiihilus^ of which he has sent me some 

 specimens. 



^pophiJus Bonnairei (PI. XI. figs. 6, 7) is 3 millim. in 

 length, its breadth is 1'5 millim. ; it colour is a rusty yellowish 

 brown. The body, especially the abdomen, is covered with 

 very fine and silky little hairs. According to Signoret the 

 external genital organs are situated above the abdomen in the 

 female and bene ath it in the male. Now I easily convinced 

 myself that this naturalist had mistaken the male for the 

 female and vice versa ; in fact, I was able easily to recognize 

 the presence of eggs in the individuals which he regards as 

 males. Moreover, the mere inspection of the genital arma- 

 tures enables one to recognize the sexes, for they correspond 

 well with the classical description of the copulatory organs in 

 the llemiptera. I had not at my disposal a sufficient number 

 of specimens to enable me to study the organs of copulation 

 in detail, but the figures which I give of these organs in tlie 



