JO CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Distribution: Woods Hole, Massachusetts; Newport, Rhode 

 Island ; Fishers Island, New York ; Fishers Island Sound ; Noank, 

 Connecticut. 



The species has been found from the surface to ii fathoms 

 in Fishers Island Sound. Professor Smith found the species ofif 

 Vineyard Sound and Buzzards Bay to a depth of 20-29 fathoms 

 on bottoms of fine compact mud and sand. 



Judd in Proceedings of the U. S. National Museum, vol. 18, 

 p. 596, 1896, describes the sexual differences of the species. 



HAUSTORIID^ 



Coxal plates of moderate size, usually fringed with setae; 

 fifth coxal plate bilobed. 



First antennas shorter than second, with accessory flagellum. 



Mandibles with cutting edge not dentate ; secondary incisive 

 plate and molar tubercle large, palp triarticulate. 



Gnathopods seldom powerful, weakly subchelate or chelate. 



Pereiopods often adapted for burrowing. 



Uropods all biramous. Telson flattened, more or less deeply 

 cleft. 



Haustorius Statins Miiller. 



First antennas with well developed accessory flagellum. 

 Second antenna; longer than the first; fourth joint of peduncle 

 laminarly expanded. 



Mandibles with rather large palp. First maxillae with densely 

 ciliated flap-like expansion outside outer plate ; palp well devel- 

 oped. Maxillipeds with inner and outer plates of nearly equal 

 size; palp with second joint produced at end interiorly to rounded 

 lobe, third joint bent to a right angle, fourth joint wanting. 



Gnathopods comparatively feeble; propodus of first simple; 

 that of second pair forming a minute chela. Two anterior perei- 

 opods with carpus having a rounded, lamellar expansion poste- 

 riorly. Three posterior periopods very wide. Dactyls wanting 

 in all pereiopods. 



Uropods, first pair with both rami coarsely spinous at trun- 

 cated tips ; second pair with rami setose ; last pair with rami 

 slender and linear, the outer biarticulate and longer than inner. 



Telson broad, slightly incised in middle. 



