INDEX 



This Index includes the names of species, genera and all other systematic 

 groups, and also the names of anatomical structures. Specific names begin with 

 a small letter and each is followed by the name of its genus in parentheses. All 

 other names and terms begin with capital letters. Specific and generic names 

 which appear in italics are synonyms. 



In the case of an anatomical structure the page referred to is the one on 

 which a definition or description of the structure will be found. 



In the case of a species, genus, or other systematic group the page referred 

 to is the one on which the principal description of it will be found. 



ABALONES, 531. 



abditum (Pisidiura), 587. 



Abdomen, in arthropods, 



323; in ascidians, 668. 

 Abdominalia, 362. 

 abdominalis (Phryxus), 



381. 



abietina (Abietinaria), 107. 

 Abietinaria, 107. 

 Aboral surface, 614. 

 Abothrium, 195. 

 Acalephae, 89. 

 Acanthobdella, 316. 

 Acanthocephala, 228. 

 Acanthochitidae, 489. 

 Acanthocystis, 23. 

 Acanthodoris, 502. 

 Acarina, 436. 

 Acartia, 345. 

 Acephala, 481. 

 Acephalina, 46. 

 acerosa (Gorgonia), 136. 

 Acetabulum, 179. 

 aceti (Anguillula), 217. 

 achetae-abbreviatae (Gre- 



garina), 44. 



acicula (Turritella), 548. 

 Aciculum, 283. 



Acineta, 68. 



Acinetidae, 68. 



Acmsea, 530. 



Acmseidae, 530. 



Accela, 158. 



Acontia, 133. 



Acotylea, 169. 



Acraspedote medusa, 88. 



Acrocyst, 104. 



Acroperus, 336. 



Acropora, 146. 



Acroporidae, 146. 



Acrosoma, 426. 



Acteon, 496. 



Acteonidae, 496. 



Actiniaria, 139. 

 Actinocephalidae, 45. 

 Actinodendron, 138. 

 actinoides (Thysanosoma). 



199. 



Actinololja, 144. 

 Actinometra, 622. 

 Actinophrys, 22. 

 Actinopoda, 648. 

 Actinosphaerium, 23. 

 Actinotrocha, 270. 

 actinotus (Hoplorhynchus), 



45. 



Actinozoa, 132. 

 Actinules, 103. 

 aculeata (Anomia), 570. 

 aculeata (Anursea), 239. 

 aculeata (Centropyxis), 18. 

 aculeata (Harmothoe), 285. 

 aculeata (Ophiopholis), 



636. 



aculeata (Pennatula), 137. 

 aculeata (Philodina), 235. 

 aculeus (Rissoa), 541. 

 acuminata (Candona), 355. 

 acuminata (Difllugia), 17. 

 acuminata (Metopidia), 



242. 



acus (Euglena), 32. 

 acuta (Hircinia), 85. 



Adamsia, 144. 



Adaptive gills, 495. 



Adinida, 39. 



^Ega, 375. 



^Egidae, 374. 



JEginella, 372. 



JEginidae, 121. 



^Eolidia, 503. 



^olididae, 503. 



^Eolidioidea, 503. 



JEolis, 503. 



^Eolosoma, 305. 



2Eolosomatidae, 305. 



705 



ffiqualis (Mediaster), 627. 

 ^Equorea, 116. 

 ^Equorea forskalea, 88. 

 /Equorea tenuis, 88. 

 -SSquoreidae, 116. 

 ^Esthetes, 485. 

 sestiva (Labidocera), 345. 

 (Bstivalis ( Dendryphantes ) , 



435. 



JEtea, 252. 

 ^Eteidae, 252. 

 affinis (Cambarus), 392. 

 afflnis (Cyclosalpa), 662. 

 afflnis (Diclidophora), 177. 

 affinis (Gebia), 389. 

 affinis (Trophonia), 300. 

 Agalmidae, 124. 

 agassizi (Gorgonocepha- 



lus, 638. 

 agassizi (Physcosoma), 



275. 



Agelena, 430. 

 Agelenidae, 430. 

 aggregata (Styela), 666. 

 agile (Nectonema), 228. 

 agilis (Caddo), 411. 

 agilis (Fredericia), 308. 

 agilis (Hahnia), 431. 

 agilis (Lumbricillus), 307. 

 agilis (Monocystis), 46. 

 agilis (Orchestia), 367. 

 Aglantha, 120. 

 Aglaura, 120. 

 Aglauridae, 119. 

 agrestis (Agriolimax), 527. 

 agricola (Geonemertes), 



210. 



Agriolimax, 527. 

 Akeridae, 497. 

 alarius (Phrurolithus), 



430. 



Alasmidonta, 582. 

 alata (Bolinopsis), 153. 



