i8o Natural History Bulletin'. i 



or more, and are greatly expanded, the front edge of each 

 extending forward and upward over the one in front. Each 

 leaflet has a row of neniatophores along its free margin, a 

 strong double process at its base, and a series of distinct nar- 

 row ridges leading from these neniatophores directly toward 

 the base of each leaflet, giving a remarkably beautiful radiat- 

 ing style of ornamentation, making this the most ornate cor- 

 bula in the collection. 



Two species of unusual size represent the genus Cladocar- 

 piis. The first, C. parcidisea Allman. is well named. It is 

 hard to keep from using extravagant language when describ- 

 ing these surpassingly graceful and striking forms. The other 

 species was described by x^llman under the name Aglauphenia 

 signia from specimens destitute of the gonosome. Our series 

 shows the gonosome, and demonstrates the fact that it belongs 

 to Cladocarpiis, having the typical gonosome of that genus. 

 Both of these species attain a height of about two feet. 



One of the prizes encountered among the hydroids is a 

 species of Idia dredged from shallow water near Key West. 

 Only one species has hitherto been kno\\n which was so 

 unique that it was made the t\'pe of a new family by Allm^. 

 The original form was found near the Philippine Islands and 

 off Bahia. The characteristic urn-shaped gonangia were well 

 shown in our specimens. They are among the most beautiful 

 of all the various structures developed for the protection of 

 the reproductive zooids among the hydroids. 



No attempt has as vet been made to study the deep-water 

 sponges of the collection, nor can the general zoologist hope 

 to do anything with this difficult group. Judging from the 

 figures in Professor /Alexander Agassiz' •• Three Cruises of 

 the 'Blake,'" it appears that we secured among others the fol- 

 lowing species of silicious sponges belonging to the Hexac- 

 tinellid^: Farrea faciinda, a species formed of anastomos- 

 ing cylinders of the most delicate lace-work; AfhrocaUistes 

 bocagci. with an equally beautiful network of silicious spicules 

 forming series of prominences like finger tips; TisifJwnia 

 fenestrata, which usually assumes a more or less globular 



