274 RECOBD OF CUERENT RESEARCHES RELATDIG TO 



descriptions and illustrations of some in the " Deep-sea Medusa of 

 the ' Challenger ' Expedition," and of others in the author's forth- 

 coming ' Spicilegium Medusarum.' 



Supposing Gegenbaur's families of Craspedota amended and 

 extended, their equivalents in Hacckel's system may be thus shown. 

 Oceanidse correspond to Anthomedusa? ; Thaumantidfe, Eucopidas, and 

 iEquoridas to Leptomedusae (with the free gonophores of the Campa- 

 nularians) ; Geryonidse with Trachynemidaa to Trachomedusfe ; and 

 Mgmida& to Narcomedusae. 



The first two of Haeckel's orders compose the collective group 

 (sub-legion) of Leptolinse in opposition to the Trachomedusa9 and 

 Narcomedusae taken together, or Trachylinae (see p. 233). 



Since the Anthomedusfe include the free medusiform gonophores 

 of the Tubulariae of Agassiz, or Gymuoblastea of Allman, it may be 

 well to cite the corresponding families from the last-named writer's 

 monograph. His Syncorynidfe, Pennaridae, Corymorphidfe, and 

 Hybocodonidae belong to Haeckel's Codonidce ; his Turridae to 

 Tiaridce ; his Bougainvillidae, Podocorynidae, and Nemopsidae to 

 Margelidce ; while his Clavatellidte and CladonemidaB constitute but 

 one family in the systems of both Agassiz and Haeckel. The genus 

 Corynetes, according to Haeckel, has its place among the Tiaridaj. 



But the chief novelties in Haeckel's arrangement are his two 

 families Petasidae and Cannotidfe. The first includes Olmdias of 

 Fritz Miiller and the subfamily Petachnidse — made up of (a) the 

 same writer's Aglauropis, (b) Gossea of Agassiz (founded on Thau- 

 mantias corynetes of Gosse), and (c) four new genera containing 

 five species discovered by Haeckel, who here also describes a new 

 species belonging to each of the three genera just mentioned. In 

 Cannotidae the radiating canals either branch or have pinnately 

 disposed offsets. The types of its subfamilies are PolyorcMs, 

 Berenice, and Willia. The genitalia of the latter arise from the 

 canal-system, the apparent origin of the ovaries from the manubrial 

 wall being the result of secondary extension. 



Notable in a high degree is Haeckel's determination of the 

 affinities of Favonia and Limnorea, genera of Peron and Le Sueur, 

 which have puzzled all succeeding systematists. Agassiz suggested 

 for their reception a new family at the end of the Ehizostomi. 

 Haeckel, having consulted the original manuscripts of Peron and 

 examined some new Medusae (Thamnostoma and Thamnostylus) which 

 approach Limnorea in aspect, now assigns them places in his Margelidae. 

 The genus Limnorea is retained. Favonia is merged in Nemopsis. 



The new account given of the iEginidae contains much interesting 

 matter, into which we cannot now enter. We have said enough to 

 show that this book of Haeckel's is essentially to be valued as a work 

 of reference. 



New Hydroid Zoophytes.* — Dr. J. Armstrong describes and 



figures the following new species from the Indian coasts and seas : — 



Lafoea elongata, at Pigeon Island and Konkan coast, also at 



* ' Jouru. Asiat. Soc. Bengal,' xlviii. (1879) p. 98 (4 plates). 



