No. 26.] ARTHROSTRACA OF CONNECTICUT. 163 



in female carpus produced to a lobe, which extends behind the 

 propodus nearly as far as the tip of the dactyl when closed, 

 armed near distal end with several spines and numerous setae; 

 propodus ovate, palm very oblique, provided with many short 

 setae and several large prehensile spines. 



First and second pereiopods short and provided with spinning 

 glands; basal joints large, subovate, more convex in front than 

 behind ; merus expanded and produced downwards in front ; 

 dactyl long and slender. Last pair considerably longer than the 

 preceding. 



Second and third uropods with margins acute and serrate; 

 terminal pair with a single subconical ramus which is curved and 

 shorter than the peduncle and has two or three short spines at 

 the tip. 



Telson emarginate, lobes armed with numerous very short, 

 hook-like spines. 



Color, on the back dark mottled gray ; coxal plates blackish. 



Length 9 mm. 



Distribution: Labrador; Grand Manan ; Bay of Fundy ; whole 

 coast of New England. It is more common north than south of 

 Cape Cod. Smith has reported it from Vineyard Sound. 



The species inhabits flexible tubes composed of sand or mud 

 stuck together with a small amount of adhesive material f r6m the 

 spinning glands. 



It is found usually in shallow water but may extend to depths 

 of 100 fathoms, according to Smith. 



Ericthonius brasiliensis (Dana). 

 1853. Pyctilus brasiliensis, Dana, U. S. Explor. Exped., vol. 

 13, pt. 2, p. 976, pi. 67, fig. 5 a-h. 



1874. Cerapus minax, Smith, Rep. U. S. Com. Fish., 1871-2, 



P- 565- 



1906, Ericthonius brasiliensis, Stebbing, Das Tierreich, Lief. 



21, p. 671. 



Eyes large, nearly round ; interantennal lobes broad with a 

 small apical point. 



Antennae of subequal length, more than one-half as long as 

 body. First antennae with last two joints of peduncle subequal 

 and about one and one-half times as long as first; flagellum as 



