222 CRUSTACEA oi' riii-:: chaxxkl islands. 



Melita g-ladiosa, Bate 



Msera g'POSSimana, ^[())l^. Abuudiint under stones ut all tide ranges. 



Eupystheus erythopthalmus, Lu. 



Amathilla Sabini, Leach. Abundant in toAv -nettings. 

 Gammarus marinus, Leach. Abundant. 



G. eampylops, Leach. 



G. pulex, Li)>. Abundant in streams, ponds and ditches. 



Amphitoe rubrieata, Leach. 

 A. littorina, Bate. 

 Podoeerus pulehellus, FAtc. 

 P. variegatus, Leach. 

 Cerapus abditus, Edw. 

 C. difformis, Eda-. 

 Siphonceeetes cpassieornis, Bate. 

 Noenia tubepeulosa, Bate. 



COPOphium longieOPne, Latr. Common in dry places in rock lissures. 

 ChelUPa tePebPanS, AUm. Common ; forms tunnels in submerged timber. 



Lestpigonus Kinahani, Bate. 



HypePia galba, Mont. Frequent in the subgenital pouches of the jelly- 

 fish Aarclia. 



Duliehia poppeeta, Bate. 



Cappella lineaPiS, Lin. Very common at all tide zones, among weeds, &c. 



C. aeutifPOns, Latr. Not common. Jersey. 



C, hystPix, Kroyer. Not common. 



C. aeanthifepa, Leach. Very common. 



C. typica, Kroyer. Not common. 



I have a micro-mount of a small specimen of Caprella ceqaihbra, Bate, 



but I am not certain whether it was taken in our waters. 



NiphaPgUS fontanus, Bate. Hogan's Pump Shrimp. Much interest 

 attaches to the " Pump Shrimps," for as far as is yet ascertained they 

 occur nowhere except in wells, even newly-bored ones, and often far 

 removed from any source of surface water. There are several species 

 knowai, but the only one found in these islands that I know of is the 

 present species. It is of typical natatorial amphipod form, very slender, 

 from six to seven- eighths of an inch long, and of a Avhite or nulky-white 

 colour. The eyes are rudimentary. All the specimens I have seen are 

 from Jersey. It is very possible that this species also occurs in Guernse}', 

 as small crustaceans have frequently been found in water from pumps, 

 but they have not been identified. In Jersey I have seen Xiphargus from 

 the following localities : 1° Regent Eoad, bored well 30 feet deep, passing 

 through compact yellow clay and gravel, down to granulitic rock 2° 

 Hastings Road, well 30 feet deep bored through clay gravel, and into 

 granulitic rock. 3° Valley des Vaux, on a hillside, well (? depth) bored 

 entirely into Felsitic (Eurite) rock. 4° St. Aubin's Road, well (? de^Dth) 

 in altered shale. It is remarkable that all these are closed wells, bricked 

 or cemented for some distance from the top, and certainly free from the 

 access of any surface water. In the numerous open wells in the country 

 parishes (the old windlass and bucket type) no specimens of this shrimp 

 are found. Nor do they occur in the water which accumulates in the 

 deeper part of quarries, nor in streams or ponds. Under what conditions 

 then were these crustaceans living prior to the boring of the wells ? It 

 is an interesting point. Certainly in cavities or fissures of some kind, 

 but the rocks are remarkably free from cleavage or other cracks, as every- 

 one knows who is acquainted with the geology of Jersey. And yet these 



