[537] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 243 



scarcely longer than the segment itself. In these appendages the spini- 

 forni process from the base is long and simple, not biramous, as in the 

 adult, and the lamella) are small, much shorter than this process, and 

 the outer one has no articulated terminal portion. The terinhuil 

 meiit is as long as the four preceding segments, about as broad as long, 

 the lateral margins slightly convex in outline, and each armed with two 

 sharp teeth, while the posterior margin is concave in outline, with the 

 lateral angles projecting into sharp teeth, between which the edge is 

 armed with about twenty small arid equal slender spines. 



D. CATALOGUE OF THE MARINE INVETEBRATE ANIMALS 

 OF THE SOUTHERN COAST OF NEW ENGLAND, AND AD- 

 JACENT WATERS. BY A. E. YERRILL, S. I. SMITH, AND 

 OSCAR HARGER. 



In the following catalogue nearly all the marine invertebrates which 

 are known to inhabit the coast between Cape Cod and New York are in- 

 cluded, except those belonging to certain groups which have not yet 

 been studied by any one, sufficiently for their identification. Such are 

 chiefly minute or microscopic species, belonging to the Entomostraca, 

 Foraminifera, Ciliated Infusoria, &c., together with the intestinal worms 

 )f fishes and other animals. Our sponges, also, have hitherto received 

 rery little attention, and it has not yet been possible to identify but a 



lall number of the species. It is not to be supposed, however, that 

 list is complete in any group, for every season in the past has served 

 greatly increase the number of species in almost every class and 

 >rder, and this will doubtless be the case for many years to come. But 

 no attempt has hitherto been made to enumerate the marine aui- 



lals of this region, excepting the shells and radiates, it is hoped that 

 this catalogue will prove useful, both to show what is already known 



mcerning this fauna, and to serve as a basis for future work in the 



ime direction. 



In some instances species that have not actually been found on the 



irt of the coast mentioned, but which occur on the shores of Long 

 [sland and New Jersey, under such circumstances as to render it pretty 



jrtain that they will also be found farther north, have been included in 

 the catalogue, but the special localities have always been given in such 



ises. 



In order not to make the list too long, only those synonyms are given 



rhich are really necessary to make apparent the origin of the names, 

 md to refer the student to some of the best descriptions and figures in 

 the works that are generally most accessible, and in which more com- 

 plete synonymy may be found. 



For the same reason, in describing the new species, the descriptions 

 have been made as brief as seemed consistent with the purpose in view, 

 viz: to enable students and others who may not be experienced natu- 



