384 



BULLETIN OF THE BUREAU OP FISHERIES. 



Synalpheus townsendi Couti^e. PL xxvi, fig. i. 



Synalpheus townsendi Coutifere, 1909, p. 32. 



Similar in form to S. longicarpus but with a much slenderer rostrum which considerably exceeds 

 the supra-orbital lobes and reaches slightly beyond the distal end of the basal article of the antennule. 

 The sides of the telson are not as strongly convergent and are slightly produced into little angles at 

 the distal end and the inner pair of spines are slender and about three times as long as the outer one on 



each side. The spine on the basal article of the antennule 

 reaches beyond the end of the article and slightly exceeds 

 the rostrum. The spine of the basal article of the antenna 

 extends to about the middle of the spine of the second arti- 

 cle, while the latter slightly exceeds the distal end of the 

 third article of the antennule. The smaller cheliped lacks 

 the brush of curled hairs on the movable finger and the 

 larger one has the upper margin of the movable finger ele- 

 vated into a thick crest. Second pair of legs with the car- 

 pus divided into five articles which have the approximate 

 proportions of 5, 1.5, i, i, 2. 



Length of a female, 16 mm.; carapace, 7 mm. 

 Color in life, body and legs a light pellucid pinkish red, 

 the large chela, pink changing to green on the fingers. 



Five specimens of a little snapping shrimp which have 

 been identified as this species were taken at the fishing 

 banks (station 7943) in 13K fathoms of water. Another 

 series was taken at the same locality (station 8293) from the 

 interior of a large sponge dredged in 16 fathoms. They do 

 not agree in all respects with Coutifere 's description and fig- 

 ures, but appear to stand about halfway between his variety 

 brevispinis and the typical form. The species has been 

 previously reported from the coast of North Carolina and its presence on the fishing banks is not 

 surprising. 



Genus CRANGON (=ALPHEUS of most authors). 



Crangon Weber, 179s, p. 94. 



Alpheus Fabricius, 1798. p. 380: Couti&re, 1899, p. 336. 



KEY TO THE SPECIES OF THE BEAUPORT REGION.<» 



a. Orbital lobes of carapace with a small spine in front .formosus. 



aa. Orbital lobes of carapace without a distinct spine. 

 6. Orbital lobes forming a toothlike projection; large hand with a groove above and below along 



outer margin and between these grooves a tooth packardii. 



bb. Orbital lobes rounded; hand broad and notched on both margins. 



c. Base of rostrum passing gradually into the lateral dorsal surface heterochcBlis. 



cc. Base of rostrum with its borders sharply defined armillatus. 



Crangon formosus (Gibbes). PI. xxvi, fig. 5. 



Alpheus formosus Gibbes, 1850, p. 196; Rathbun, 1901, p. 106. 

 Alpheus poeyi Gu&rin Meneville. 1857, p. 10. 



Carapace one-half as long as the abdomen, compressed, not grooved; rostrum beginning at pos- 

 terior line of the eyes and reaching, or nearly reaching, the second article of the antennule, flat above, 

 its margins concave at base but nearly parallel anteriorly and with scattered stiff hairs; the tip rounded, 

 with two or three minute spines; orbital lobes with an acute, anteriorly directed spine much shorter 

 than the rostrum. 



Fig. 7. — Synalpheus townsendi. 

 a. Front of carapace and appendages; b, telson; 

 , second leg; d. large cheliped. 



o In the account ot his trip to Bea>ifort, Stimpson (Amer. Jour. Sci. & Arts, ser. 2, vol. laax, p. 442-44S, i860) mentions 

 Alpheus inlermedius as a member of the Beaufort fauna. It has been impossible to ascertain what spedes he had in mind and 

 a thorough review of the literature has failed to bring to light any crustacean described under that tuune. 



