510 



BULLETIN OF THE BUREAU OF FISHERIES. 



Amphithoe rubricata (Montagu). 



Amphithoe maculata Stimpson, Marine Invert. Grand Manan. p. 53, 1853. 

 Amphithoi valida Smith, Rept. V. S. Fish Com. 1871-72, p. 563. 



A stout, robust species; eyes rather small, circular to oval in outline; first antenna; sometimes 

 exceeding half the length of body, especially in the female; second basal joint about as long as first 

 and twice as lung an third; flagellum generally longer than peduncle and slender. Second antenna; 

 st. nit, especially in the male, in which they may nearly equal the first pair in length; flagellum short 

 and thick, composed of few joints, often less than half the length of peduncle; coxal plates deeper 

 than their segments, the first strongly produced at anterior angle, which is narrowly rounded; second 

 coxal plate broad, produced, and very broadly rounded at anterior angle; first gnathopods in the male 

 stout, basal joint broad and produced into a prominent lobe at inferior angle; hand oblong, palm 

 oblique convex, posterior angle rounded and armed with a spine; second gnathopods with basal joint 

 broad, inferior lobe relatively smaller and more acute than in first pair; hand rather stout, with a 

 terminal tuft of plumose setae; palm oblique, proximally convex and distally somewhat concave, 

 posterior angle produced ; in female, carpus of first gnathopods shorter than in male, and hand narrower 

 but otherwise quite similar in form; hand of second gnathopods resembling that of male, but not so 



\ 



Amphithoe rubricata. Arichat Cape. 



densely setose at the tip, and the posterior end of the palm has a strong spine; posterior angles of 

 three anterior abdominal segments rounded; terminal uropods more than half the length of peduncle. 



Color varying from green to reddish; generally a row of light-colored spots along mid-dorsal line, 

 one spot to each segment. 



Length, 20 mm. 



Found under rocks and amongst seaweed at low tide; specimens are often found in tubes covered 

 with sand or bits of algae. Whole coast of Norway (Sars); England; France; Azores; Labrador; Bay 

 of Fundy; Grand Manan (Stimpson); Woods Hole; Newport, R. I. 



I have compared American forms with specimens of this species from England. Specimens sent 

 to the IT. S. National Museum by Professor Smith under the name Amphithoe valida, and which I have 

 examined, agree well with Professor Smith's description of that species, which is certainly identical 



with .1. rubricata. 



Grubia compta (Smith). 



Amphithoe compta Smith, Rept. U. S. Fish Corn. 1871-72, p. 5G4. 



Body more robust than in Amphithu'i limr/imana, but. less so than in A. rubricata; eyes round, red 

 in life; first antennae sometimes as long as body; second basal joint a little longer than first, and about 

 three times as long as third; flagellum slender, elongated; a small two-jointed secondary flagellum not 

 longer than last joint of peduncle; second antennae rather slender, nearly as long as first; flagellum slender 

 and elongate; anterior coxal plates oblong, much deeper than their segments, anterior pair not produced 

 forward so much as in preceding species; gnathopods in the male much elongated and with both 

 margins furnished with long plumose hairs; first pair about as large as second; merus produced 

 downward into a large triangular process, which is excavated anteriorly to receive carpus; carpus 

 considerably larger ami slightly broader than hand; hand oval; palm oblique, nearly straight, rounded 

 at posterior end, where it is armed with a strong spine; second gnathopod merus produced downward 



