No. 26.] ARTHROSTRACA OF CONNECTICUT. 43 



apparently only when a sudden disturbance renders the hold of 

 the male insecure. The male carries the female thus for several 

 days or probably much longer, and can with difficulty be 

 separated without injuring him. 



Deposition of the eggs and fertilization have been observed 

 rarely. Delia Valle has described the process fully in Gammarus 

 pungcns, a fresh-water species of Europe. Deposition of the 

 eggs takes place soon after molting and while the eggs are being 

 discharged the male slips around the female so that their two 

 heads are still pointing in the same direction but their ventral 

 sides are directed toward each other and the openings of the 

 vasa deferentia lie close to those of the oviducts. In this posi- 

 tion the spermatic fluid is discharged over the eggs and fertilizes 

 them. Immediately following the ejaculation the male returns 

 to his former position with reference to the female. 



LIST OF SPECIES. 

 In the following list an * indicates that a species is likely to 

 be met with in the State although up t9 this time it has been un- 

 reported. A f indicates that a species is found in fresh water. 

 Heavy-faced type indicates a species unreported hitherto from 

 New England. 



HYPERIIDEA A. spinipes Boeck 



Hyperia galba (Mont.) Byblis serrata Smith 



GAMMARIDEA i-iaustoriid^ 



LYSiANASSiDJS Haustorius arenarius (Slabber) 



Lysianopsis alba Holmes phoxocephalid^ 



Orchomenella pinguis (Boeck) Phoxocephalus holbblli (Kr.) 

 *Tmetonyx cicada (Fabr.) Paraphoxus spinosus Holmes 



T. quadratus sp. nov. *Harpinia plmnosa (Kr.) 



*Hippomedon serratus Holmes metopid^ 



*Anonyx nugax (Phipps) *Mctopa granlandica Hansen 



stegocephalid^ 



, , . „ ^ TT STENOTHOIDJi: 



*Stegocephalus miiatus Kr. ^ , ^ • tj^i^^o 



^ ^ Stenothoe cypns Holmes 



AMPELISCID^ , _y_ ^,^.,^^^^^ H„lj„e3 



Ampelisca macrocephala Lulj. 



*A. compressa Holmes lafystiid.e 



*A. agassizi (Judd) *Lafystius stunoms Kr. 



