ON CRUSTACEA OF DUBLIN DISTRICT. 267 
number of species found on the shores, &c. of Great Britain, Ireland, and the 
Channel Islands. The families and genera not yet proved to be represented 
in Ireland are ¢éalicized. The following summary shows the contrast be- 
tween these several districts as regards the number of species and genera. 
Tasie.B.—Summary of number of species and genera. 
Eubranchiata, Anomobranchiata. 
Districts. a SS SSS 
Macroura. | Anomoura. | Brachyura. |Stomapoda. |Schizopoda.| Aploopoda. 
Dublin ........ iene 19 11 (1?) 25 (1 ?))  sccceee 3 (1?) 1 
Preland!.7..... <0. 30 tree dee or BS 6 4 
Not found in Great 
= ey chaghabianl \ eR sees, Td Bie ae Goes 2 
British sce.c.seee0. 47 20 40 2 ll 9 
91. 
47. 
Dublin 
Dublin 
Species, Irish ...... 
Genera, Irish 
59. 
30. 
British ., 
British 
The following is a detailed list of the species found hitherto in Dublin:— 
Tasixe C.—Species of Crustacea Podophthalmia inhabiting Dublin Districts, * 
ad 
* Common. ** Verycommon. ft Rare. { Very rare. L. local. 
Ratio 
Name of Species. é saiae Zone of distribution Remarks. 
rence ; 
Inachus Dorynchus ........., *  |Coralline. 
— Dorsettensis ............ ft |Coralline 
| Hyas araneus © ....ecccsceeess ** |Littoral—Laminarian. 
—— Coarctatus  .........0. ** |Laminarian—Coralline. 
Stenorhynchus phalangium | ** |Littoral—Coralline. 
Eurynome aspera .......0000 *  |Coralline. 
Pirimela denticulata .........| Dos sss cescisecscsas «+eee+.|One specimen only. 
Cancer pagurus ..........0000 #& | Littoral—Laminarian. 
. Pilumnus hirtellus.... t  |Laminarian—? littoral. 
Portunus puber ..........0064 +#* |Littoral—Laminarian. 
— corrugatus ........ seesf E (Hittoval ?. oc cee, enon tacts ...|One young specimen. 
—— arcuatus ...,...006 aaeaal oS DO He sasidaan- ease Do. 
—— depurator ..........0000 * Laminarian—Coralline. 
—— pusillus ......cecceeeees ..| #& |Laminarian—Coralline. 
— holsatus ....... Sdeedess * | Do. Do. ....--|Rather local. 
Carcinus meenas. .........06 ** | Littoral—Laminarian. 
Portumnus variegatus Reet beacuse eOadenasatevertss yesaena Never dredged 
Atelecyclus heterodon ...... Mem OGHORAL Seetseescaentecs ees =< Only young met 
Corystes Cassivelaunus....,.) *  |Littoral .....ss0cceeee Pe} Never dredged 
Gonoplax angulatus.........., TL. [Littoral .........ccssecsecees Never dredged 
Pinnotheres pisum............, ** |{Laminarian—Coralline 
Ebalia Pennantii .........++ t |Coralline 
—— Cranchii ...............1 25 WGnyisesrwackeuseruewecedse=¢ Obtained by R. Ball, LL.D. 
Bernhardus Streblonyx +** |Littoral—Coralline, 
—— Prideauxii.............+. Fo ee dcdddvduteuelee .-..{A single dead specimen. 
—— Thompsonii ............ * Coraline. 
—— Cuanensis...,.....00....| ** |fLaminarian—Coralline, 
