THE MOUNT DESERT REGION 



249 



Orchomenella groenlandica and Metopa carinata, and the ab- 

 sence of southern elements, notably the genera Sfenothoe and 

 Microdeutopus, which are conspicuous forms at Woods Hole. 



The members of this order are abundant and form a nicely 

 graded series of sizes from 25 mm. down to about 2 mm. They 

 may be recommended, therefore, as excellent practice material 

 for dissection under the microscope and as objects for vital 

 staining experiments. 



The most valuable papers on New England species of this 

 order are: Holmes (1905), G. 0. Sars (1890-1895), and Shoe- 

 maker (1930). 



Suborder GAMMARIDEA 



Lysianassidae 



Anonyx Kroyer 

 A. NUGAX (Phipps). (Holmes, 1905, p. 472, pi. 3, fig. 3, text 

 fig.). A few were taken on bottoms of mud and gravel, depth 

 20 to 135 feet. Stations : D 32, 97, 109, 112. 



HiPPOMEDON Boeck 

 H. SERRATUs Holmes. (Holmes, 1905, p. 473, pi. 4, fig. 2, 

 text fig.) Taken twice on rock bottom, in 45 to 64 feet. Sta- 

 tions : D 27, 118. 



Orchomenella G. 0. Sars 



0. piNGuis (Boeck). (G. 0. Sars, 1890, p. 67, pi. 24.) The 

 most common member of its family in the region. Found on 

 various bottoms, from low water to 156 feet. Stations : D 13, 

 18, 21, 25, 28, 36, 39, 55, 96 ; S 6 ; P lOB. 



0. GROENLANDICA (Hauscu). (G. 0. Sars, 1891, p. 70, pi. 26.) 

 One specimen taken on rock bottom, in 70 feet of water, at 

 D 94. The species is new to New England. 



Ampeliscidae 

 Ampelisca Kroyer 

 A. MACROCEPHALA Lilljeborg. (G. 0. Sars, 1891, p. 172, pi. 

 60.) Found on various bottoms, but always in the presence 



