STOMATOPODA 



383 



M. stenolepis S. I. Smith (Fig. 613). Body cylindrical; carapace 

 with a short, blunt rostrum, and with its lower anterior margin extended 

 to form a sharp tooth; body bends between the first and second abdom- 

 inal segments; length, male, 

 23 mm.,, female, 30 mm.; 

 color white, with black stel- 

 late spots: coast of New 



England and southwards, 



Fig. 613 Mysis stenolepis (Paulmeier). 

 often common in eel grass. 



M. relicta Loven (Fig. 614). Body slender, 18 mm. long: 

 in Lakes Superior and Michigan; Europe and 

 Asia, in large fresh-water lakes. 



2. HETEROMYSIS S. I. Smith. First pair of thoracic 



legs larger than the others 

 and ending each with a 

 claw; antennal scale very 

 small; abdominal append- 

 ages rudimentary in both 

 male and female: one 



Fig. 614 Mysis relicta (Siissw. F. Deut.). 

 1, flagella of first antenna ; 2, scale of second 

 antenna ; 3, second antenna. 



species. 



H. formosa Smith. Length of male 6 mm., of female 8.5 mm.j 

 females rose-colored; males colorless: coast of New 

 England, in eel grass or often in dead mollusk shells, 

 sometimes in swarms. 



ORDER 2. STOMATOPODA.* 



Body large, with a small flat carapace which does 

 not cover the posterior thoracic somites, with a broad 

 elongated abdomen bearing gills on the appendages; 5 

 pairs of maxillipeds, the second pair being much larger 

 than the rest and subchelate, and 3 pairs of periopods; 

 heart long and tubular; liver, testes, and ovaries extend- 

 ing the length of the thorax and abdomen, the testes 

 being a pair of delicate tubes and the ovaries a broad 

 median band: 10 genera and about 90 species, all 

 marine; often used for food. 



SQUILLA Fabricius. Five posterior thoracic 

 somites not covered by the carapace, of which the first 

 is very small and the second has a lateral spur on each side and the last 

 3 bear the periopods : 21 species. 



Fig. 615 Squilla 

 empusa (Paul- 

 meier). 1, first an- 

 tenna ; 2, second 

 antenna ; 3, scale 

 of second antenna ; 

 4, second maxilli- 



ed ; 5, periopods ; 

 , uropod. 



* See "Report on the Crustacea of the Order Stomatopoda," etc., by R. P, Biglow, 

 Proc. U, S, N, Mus., Vol. 17, p. 489, 1891. 



