356 



REPORT — 1856. 



Families, 8(c. 



A. 



B. 



C. 



D. 



E. 



F. 



G. 



8 



5 



2 

 5 

 2 

 3 



9 



7 



41 

 13 

 31 



85 



10 



6 



101 



41 



142 



H. 



6 



1 

 3 



1 

 1 

 3 



2 



6 



6 



11 



1 

 11 



52 

 29 

 20 



101 



11 



6 



118 



47 



165 



I. 



3 



1 



"i 



"i 



"3 

 4 



1 

 4 



18 

 18 

 11 



47 

 8 

 1 



56 



40 



96 



K. 

 30 



"9 



*6 

 2 



1 



4 



14 



16 



82 

 47 

 31 



160 

 30 

 22 



212 



76 



288 



L. 



4 



1 



"4 

 1 



3 



1 



6 



6 



1 



14 



41 

 34 

 17 



92 

 9 

 1 



102 



62 



1 



165 



M. 



52 

 1 



3 



16 



1 



9 



5 



3 



12 



21 



30 



1 



45 



199 



118 



68 



385 

 61 

 31 



477 



189 



1 



667 



N. 



146 



1 



3 



27 



1 



15 



11 



10 



24 



29 



59 



1 



90 



417 

 213 

 140 



770 



148 



58 



976 



423 

 17 



1416 



(Proloscidifera, continued) 



Doliadse 



Cassidae 



Tritonidae 



81 



■3 



2 



3 



5 



4 



17 



28 



143 

 70 

 22 



235 

 63 

 15 



313 



141 

 16 



470 



9 

 "2 



"i 

 2 



"7 



6 



6 



1 



11 



45 

 30 

 15 



90 

 12 



4 



106 

 56 



162 



19 



2 

 2 



1 

 2 

 2 



1 

 9 

 7 

 7 

 1 

 14 



67 

 56 

 17 



140 



15 



3 



158 



83 

 1 



242 



4 



1 



2 



1 

 1 

 3 

 3 



1 

 7 



24 

 21 



8 



53 

 4 

 2 



59 



60 



1 



120 



1 

 2 



2 



"i 



1 

 4 



10 



8 



1 



19 

 5 

 2 



26 



"i 



... 



28 



105 



"2 



5 



1 



5 



2 



5 



18 



15 



24 



1 



50 



233 



131 



47 



411 

 91 

 23 



525 



266 

 17 



808 



Turbinellidae 



Mitrinse 



Olividse 











Total Proboscidifera 



Total Rostrifera 



Total Toxifera 



Total Pectinibranchiata 



Total Scntibranchiata, &c 



Total Opisthobranchiata and 

 Pulmonata. 



Total Gasteropoda 



CEPHALOPODA . 



Total Lamellibranchiata 



Total Palliobranchiata & Bryo- 

 zoa. 



Total Fauna, Gulf to Panama 



80. Now let it be carefully borne in mind that every column of this resume 

 is, without doubt, very far from the actual truth. Whatever may be learnt 

 from it must be estimated positively, and by no means negatively. E.g. not- 

 withstanding the scrutinizing researches of Cuming, C. B. Adams, Hinds, 

 Bridges and others in the Bay of Panama, and our almost complete ignorance 

 of all parts of the Gulf except its entrance, 808 species are quoted from the 

 latter and only 697 species from the former, giving a balance of 111 species 

 in favour of the northern station. Now when it is borne in mind that Panama 

 is in the central tropical region, that it receives both the North American 

 species as they travel southwards, and the South American as they move 

 upwards, besides (in all probability) a little nest of bay shells peculiar to its 

 own quiet haunts ; while the Gulf fauna receives scarcely any importations 

 from the north, and only those southern forms of life which are capable of 

 subsisting at the very borders or beyond the tropics; it must be evident that 

 much more has to be done before even the central portion has been brought 

 up to its proper standing. Then let it be remembered how many species 

 must be yet unknown in the Gulf district. Large as is our acquaintance 

 witrfi the minute species, as the whole of it has been obtained by ransacking 

 the worm-eaten passages of a few Chamce and Spondyli, and examining the 

 dirt on the backs of other shells, what may be expected when the shores and 

 sea-bed have been subjected to the minute examination of a Barlee, an Alder, 

 or a Bean! In the British fauna, 170 out of 511 species are minute. It 

 might have been thought that degeneration of size was a condition of high 

 latitudes ; but wherever attention has been paid, the tropical seas are found 



