INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 729 



RHEaMATODES TENUIS A. Agassiz. (p. 454.) 



In Agassiz, Coutributions, vol. iv, p. 361, 1862 ; Catalogue, p. 95, figs. 136-138. 

 Buzzard's Bay and Vineyard Sound. 



ZYaoDACTYLA Grgenlandica Agassiz. Plate XXXVII, fig. 275. (p. 

 449.) 



Contributions, vol. iv, p. 360, 1862 ; A. Agassiz, Catalogue, p. 103, figs. 153-156. 

 ^qnorea G-rcenlandica Peron and Lesueur, Ann. du Mus., vol. xiv, p. 27, 1809 

 (t. A. Agassiz). 



Buzzard's Bay to Greenland. Common in Vineyard Sound, in June 

 and July. 



J^QUOREA ALBIDA A. Agassiz. (p. 454.) 



In Agassiz, Contributions, vol. iv, p. 359, 1862 ; Catalogue, p. 110, figs. 160-162. 



Buzzard's Bay (A. Agassiz). 



TiMA F0R310SA Agassiz. (p. 449.) 



Contributions, vol. iv, p. 362, 1862 ; A. Agassiz, Catalogue, p. 113, figs. 164-172. 



Vineyard Sound, February and April. Massachusetts Bay (A. 



Agassiz). 



EUTDIA LIMPIDA A. Agassiz. (p. 454.) 



In Agassiz, Contributions, vol. iv, p. 363, 1862 ; Catalogue, p. 116, figs. 173-178. 

 - Buzzard's Bay, Naushon (A. Agassiz). 



Lapoea calcarata a. Agassiz. (p. 408. y 



Catalogue, p. 122, figs. 184-194. Lafcea cornuta Agassiz, Contr., vol. iv, p. 351 

 (7*0^ of Lamouroux). Laodicea calcarata A. Agassiz, in Agassiz, Contributions, 

 vol. iv, p. 350, 1862. Campaniilaria dumosa Leidy, op. cit., p. 138, 1855 (not of 

 Fleming). 



South' Carolina to Vineyard Sound; Buzzard's Bay and Vineyard 

 Sound. The hydrarium was abundant on floating Zostera and algne in 

 Vineyard Sound, creeping over Sertularia cornicina; also at low- water, 

 and in 6 to 8. fathoms on Fhyllophora ; Thimble Islands, in tide-pool, on 

 Yesicidaria. Charleston, South Carolina (McCready, described as a 

 constituent part of his JDynamena cornicina). 



Haleciux gracile Verrill, sp. nov. (p. 328.) 



Stems slender, flexible, clustered, compound, consisting of many very 

 slender, united tubes, light brown or yellowish, pinnately much branched ; 

 branches alternate, ascending, long, slender, tapering, similar to the main 

 stem, and usually similarly subdivided ; the branches and branchlets 

 mostly arise from opposite sides of the stem, so that they stand nearly 

 in one plane ; ends of branches and the branchlets simple, very slender, 

 translucent, whitish, divided into rather long segments; the articula- 

 tions not very conspicuous, somewhat oblique ; each segment usually 

 with a prominent cylindrical process, arising from near the upper end, 

 which, on the older branches, bears the hjdroid cell, but on the young 

 branchlets are themselves hydroid cells, furnished with a thin, slightly 



