INDEX TO MOLLUSCA OF NEW YORK 



Quadrula trigona, 93°. 

 tuberculata, 94 s . 

 undulata, 93*. 



Radix ampla, 52*. 



columella, 52 7 . 

 Retusa, 26". 



gouldi, 26 7 . 

 Rissoa, 19 1 . 



aculeus, 19 s . 



areolata, 19 6 . 



laevis, 19*. 



latior, 19 6 . 



minuta, 19 1 . 



stimpsoni, 19 8 . 

 Rissoidae, 18 6 . 

 Rissoinae, 19 1 . 



Sanguinolaria fusca, 68 4 . 



sordida, 68 6 . 

 Saxicava, 65 s . 



arctica, 65 7 . 



distorta, 65 7 . 



pholadis var. t 6s T . 

 Saxicavidae, 65 s . 

 Scala, io 7 . 



angulata, io 7 . 



humphreysii, io 8 . 



lineata, io 9 . 



multistriata, io 8 . 

 Scalaria angulata, io 7 . 



humphreysii, 10 s . 



lineata, io 9 , n 1 . 



multistriata, io 8 . 

 Scaphander, 25°. 



punctostriatus, 25°. 

 Scenea, 18 9 . 



planorbis, 18 9 . 

 Sceneinae, 18 8 . 



Scissula iris, see Tellina (Scissula) 

 iris. 



Scutibranchiata, 24 s . 

 Segmentina, 62*. 



armigera, 62 s . 

 Semelidae, 67 s . 

 Serripes, 78*. 



gronlandicus, 78 s . 

 Sigaretus, 9 3 . 



perspectivus, 9 s . 



Siliqua, 65 2 . 



costata, 65 2 . 

 Sinupalliata, 64 s . 

 Sipho, 5 a . 



islandicus, 5 s . 



pygmaeus, 5 s . 



stimpsoni, 5 s . 



ventricosus, 5*. 

 Siphonida, 64 2 . 

 Skenea planorbis, 18 8 . 



serpuloides, 18°. 

 Solariella, 25'. 



obscura planula, 25 2 . 

 Solariidae, io 8 . 

 Solecurtus bidens, 65 9 . 



caribaeus, 65*. 



gibbus, 65 s . 

 Solemya, 79 s . 



velum, 79 8 . 

 Solemyidae, 79 s . 

 Solen ensis, 64 s , 65 1 . 



siliqua, 65 1 . 



vagina, 64 s . 

 Solenidae, 64 s . 

 Soleninae, 65 s . 

 Somatogyrus, 22 3 . 



integer, 22*. 



isogonus, 22 8 . 



subglobosus, 22*. 

 Sphaerium, 70*. 



croceum, 74*. 



fabale, 72*. 



fabalis, 72 s . 



occidentale, 72 s . 



partumeium, 73 s . 



partumium, 73 s . 



rhomboideum, 70°. 



rosaceum, 73°. 



secure, 74 s . 



securis, 74 1 . 



simile, 70 5 . 



similis, 70 8 . 



solidulum, 71 8 . 



stamineum, 72 7 . 



striatinum, 71 3 . 



sulcatum, 70 5 . 



transversum, 72 s , 73 1 . 



truncatum, 73 6 . 



vermontanum, 72*. 



