Mactrida, xxvii., xxx., 77. 
Mangelia, 34. 
linearis, 54. 
nebula, 32. 
urpurea, 34, 
'revelliana, 34. 
Mangilia, xiv. 
attenuata, 32. 
brachystoma, 32. 
costata, 33. 
levigata, 33. 
var. minor, 33. 
nebula, xiv., 32. 
rufa, 35. 
striolata, 32. 
turricula, 33. 
Marginella, 38. 
levis, 38. 
Marsenia, xix. 
Meretrix, xxx. 
Mesodesmatia, xxvii., xxx. 
Mesoplacophora, xxiv. 
Modiola, xxix. 
adriatica, 69. 
barbata, 69. 
modiolus, 69. 
phaseolina, 69. 
rhombea, 70. 
tulipa, 69. 
Modiolaria, xxix., 69. 
costulata, 70. 
discors, 70. 
marmorata, 69. 
Modiolopsidx, xxvii. 
Molluscoida, 96. 
Monodonta, xxi., 56. 
labio, xxi. 
lineata, xxi., 56. 
Monotremata, viii., 2. 
Montacuta, xxix., 74. 
ferruginea, 74. 
bidentata, 74. 
substriata, 74. 
Murex. 
aciculatus, 37. 
costatus, 53. 
coralinus, 37. 
erinaceus, 37. 
gracilis, 34. 
reticulatum, 38. 
tubercularis, 39. 
104 
Muricide, xv., 37. 
Mya, xxxi. 
declivis, 94. 
pictorum, 71. 
preetenuis, 94. 
Myacea, xxvii., xxxi. 
Myide, xxvii., xxxi. 
Mytilacea, xxvii., xxix, 
Mytilide, 
xxix., 68. 
Mytilus, xxix., 68. 
cygneus, 71. 
discors, 69. 
edulis, 68. 
var. pellucida, 68. 
rugosus, 90. 
Xxvil.,  XXvVill., 
N. 
Nassa, xv., 36. 
incrassata, Xv. 36. 
pygmea, xv., 56. 
PF aeilate, XV. 56. 
Nasside, xv., 36. 
Natica, xix. 
monolifera, 50. 
Montagui, 51. 
Naticide, xv., 50. 
Naticina, xix. 
Alderi, 51. 
catena, 50. 
Montacuti, 51. 
Neptunea, xiv. 
antiqua, Xiv. 
Nerita, 41. 
pallidula, 41. 
Neritide, xxi., 56. 
Neritina, xxi., 56. 
fluviatilis, 56. 
Neritoides, xvii., 41. 
obtusata, 41. 
Notaspidea, xiii. 
Nucula, 65. 
nitida, 65. 
nucleus, 65. 
var. radiata, 65. 
Nuculidear, xxvii., xxviii., 65. 
Nudibranchiata, xii., 27. 
