268 -REPORT—1858. 
, Table C (continued). 
RY rir eee er eee eer er Herre Pee Sere 
Ratio 
‘ of MR ve 
Name of Species. banat Zone of distribution. Remarks. 
rence. 
Bernhardus Ulidianus ...... xx |tLaminarian-—Coralline. 
—— Hyndmanni ....... weve] 7K Do. Do. 
Porcellana platycheles ......| | *L. |Littoral—Laminarian _ ...|/[xtremely local. 
longicornis ...see-ee0e. #* |Littoral—Coralline. 
Galathea squamifera ....... ..| t  |Laminarian........ seveee-| Never dredged. 
—— Andrewsii.........++ «ee. #* |Coralline, &c. 
StTIGOSA s..esesscseeeeeee t  |Laminarian ..............004. Never dredged. 
Palinurus vulgaris ...........- ¢  |Laminarian and Coralline. 
Astacus fluviatilis ......... «| *  |Fluviatile. 
Homarus vulgaris ..... pesca 4&  [Laminarian ......ceesesceeees Never dredged. 
Nephrops Norvegicus ...... x |Coralline, &c. 
Crangon vulgaris ........ ....| %¥& |Littoral—Laminarian ......|Also subfluviatile. 
Allmanni .......«0...06., * |Coralline. 
—— SCUIPtUS ..,.ccseereeees) * Do. 
—— fasciatus ..,............, ¢ | |Laminarian. 
—trispinosus ............] tT  |Coralline ...............e0e+e.|Robert Ball, LL.D. 
Hippolyte varians ............ «x |fLittoral—Laminarian — 
t+Coralline. 
—— Thompsoni .eeeee.sses. * |Laminarian—Coralline. 
—— Cranchii ...............| * —|Littoral—Laminarian. 
—— pusiola .........s00..0..., ** |Laminarian—Coralline. 
Pandulus annulicornis ......) ** |{Laminarian—Coralline. 
— leptorhynchus .........} $  |Laminarian ............. .»...(One specimen. 
| Palemon squilla ............/ #* |Littoral—Laminarian .,.|Never dredged. 
SEITAtUS cccreccccececss| +  (Coralline .....ss00.cecossscers Do. do. 
VaTians ....sscsceeeeees .-| *  |Littoral—Laminarian...... Do. do. 
Mysis Chamzleon............| ** |Littoral—Laminarian...... Also subfluviatile. 
—— vulgariS..........s0000++ ee Do. Dor} ccs. ce .-.| Do. do. 
me? one secccseveee| cee fLaminarian .........0. Sandycove. 
Diastylis Rathkii ............| t  |Coralline..... sabanees eeaaeee Robert Ball, LL.D. 
Xantho florida is stated also to have occurred, but needs confirmation ; it 
may possibly occur in Lambay Island. 
On River Steamers, their Form, Construction, and Fittings, with re- 
ference to the necessity for improving the present means of Shallow 
Water Navigation on the Rivers of British India. By ANDREW 
Henperson, 4.1.C.E., M.S.A., F.R.G.S. 
[A Communication ordered to be printed entire among the Reports. ] 
1. Comprehensive Objects aimed at.—The object of this paper is to offer 
some suggestions for the improvement and extension of steam navigation on 
the Ganges, Burhampootra, and Irrawaddy, in the east, and on the Indus and 
the Punjaub rivers on the west, now forming the river boundaries of England’s 
empire in India; the coasts and harbours affording a desirable field for 
maritime enterprise, and the employment of British shipping. The valleys, 
deltas, and upper aftluents of those rivers extend many thousand miles 
through some of the most populous and fertile regions in the world, the whole 
route from east to west traversing the most ancient sites of civilization and 
channels of trade, there being a probability that the navigation of the Indus 
