204 CALIFORNIA ACADEMY OF SCIENCES. 



sides parallel; peduncle not reaching the middle of the acicle. Maxillipeds 

 rather short. Auterior chelipeds scarcely reaching the tip of the antennal 

 peduncle. The three posterior pairs of legs are slender and have short 

 dactyls. Abdomen slender, the third joint rounded above but produced 

 backwards in the middle. Telson narrow and armed above with seven 

 pairs of minute spi miles. 

 Length, 25 mm. 



One specimen collected at Monterey by Dr. H. P. 

 Johnson. 



Easily distinguished from all the other species of 

 Heptacarpus by its very slender, elongated body and very 

 narrow rostrum. Collection University of California. 



Heptacarpus Herdmani (Walker). 



Spirontocaris Herdmani WALKER, Trans. Liverpool Biol. Soc., Vol. XII, 

 1898, p. 277, PI. XVI, fig. 2; Ann. Mag. Nat. Hist. (7), Vol. II, 1898, 

 p. 276. 



Carapace with a subocular spine and a small tooth at the antero-inferior 

 angle. Rostrum horizontal, a little shorter than the carapace, the dorsal 

 carina continued back upon the carapace nearly to the middle; "upper 

 margin with five teeth, of which two are on the thorax, the second, third 

 and fourth close together, the distance from the fifth to the point equal to 

 the length from the second to the fourth. Lower margin with one tooth 

 near the point." Maxiliipeds reaching considerably beyond the tip of the 

 acicle. First pair of legs reaching beyond the tip of the acicle, " the 

 propodus as wide and more than twice as long as the carpus." "Abdom- 

 inal segments having the lower margin rounded in the first four, acute in 

 the fifth." 



" One female with ova. Length, 30 mm." 



Heptacarpus? stylus (St.). 



Hippolyte stylus STIMPSOX, Proc. Acad. Nat. Sci. Phila., 1864, p. 154. 

 KINGSLEY, Bull. Essex Inst., Vol. X, 1878, p. 62. 



Body slender. Carapace smooth, not crested, except for a short distance 

 in front. Kostrum slender, styliform, perfectly straight and equal to the 

 carapace in length; the upper side is armed with four or five teeth near 

 the base, while the anterior two-thirds is devoid of teeth; lower side with 

 five or six teeth. An antennal spine present but no supraorbital or ptery- 

 gostomian spine. Antennal scale oblong, scarcely shorter than the rostrum 



