AUT. 1 



NEW BOPYRID ISOPODS PEAESE 



pairs of incubatory lamellae do not completely inclose the brood 

 pouch. The first pair are produced into a blunt lobe distally. The 

 posterior pair are setose along their distal margins. 



Male: Length of body, 1.2 mm.; width, 0.4 mm.; slightly concave 

 at the middle. First antennae 3-segmented, second antennae 2- 

 segmented. Eyes near posterolateral angles, rounded. There are 

 seven distinct thoracic metameres and seven pairs of subchelate 

 peraeopods. The first three segments of the abdomen are distinct; 

 the last three are fused into a tail piece, which bears three rounded, 

 distal lobes, the median one of which is much larger and projects 

 much beyond the others. Epimeral plates are larger on the right 

 than on the left later margins. There are no uropoda, and pleopods 



16 \ 



Figures 15-21. — Hemiarthrus achmitti, new species : 15, Female, without incubatory 

 pouch ; 16, head of male, dorsal view ; 17, male abdomen ; 18, young female ; 19, 

 first leg, male; 20, head of male, ventral view; 21, male abdomen 



are represented only by two pairs of tubercles on the first two ab- 

 dominal segments. 



The species is named for Dr. B. C. Chopra, of the Indian Museum. 



Type.—V.S.'^M. No. 64488. 



Genus HEMIARTHRUS Giard and Bonnier 



HEMIARTHRUS SCHMITTI, new species 



FlGUBES 15-21 



This isopod is a parasite on the ventral side of the abdomen of 

 Synalpheus hrooksi Coutiere at Tortugas, Fla. The host lives in 

 the loggerhead sponge, Speciospongia vespara (Lamarck) Marshall. 



Description. — Female : Body asymmetrical, greatlj^ swollen on one 

 side by outgrowth of marsupial pouch ; length of largest specimen, 4.6 

 mm. ; width, 2.5 mm. Head flat, somewhat wider than long, deeply 

 sunk into thorax; anterior margin nearly straight; a blunt lobe at 

 the anterolateral angle on the side opposite the marsupial pouch. 



