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



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

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

 adult, and the lamellae are small, much shorter than this process, and 

 the outer one has no articulated terminal portion. The terminal seg 

 ment 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 and equal slender spines. 



D. CATALOGUE OF THE MARINE INYETEBRATE 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 

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

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

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

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

 to greatly increase the number of species in almost every class and 

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

 as no attempt has hitherto been made to enumerate the marine ani 

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

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

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

 same direction. 



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

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

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

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

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

 cases. 



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

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

 and 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 w T ho may not be experienced natu- 



