i 



184: Notes on North, American Crustacea. 



gcnere Huenia^ et maxime dentatis ; lateribus sublaminis perpendicu- 

 laribus. Orbitas completae, parvje et profundae, sed non tubulares, 

 Oculi retractiles et sese latentes. Rostrum et antennae externse eis 

 generis Microphryos similia. Rostrum longulum, bifidum. Antennarum 

 externarura spina articuli basalis longa acuta, cornum rostri valde simu- 

 lans ; pars mobilis aperta. Spina praeorbitalis saliens acuta; angulus 

 orbitae externus dentiformis, minutus; fissurae orbitales superiores apte 

 clausge, inconspicure. Maxillipedum externorum endognathi merus 

 latior quam longior, angulo externo acute prominens, angulo interno 

 sinuatus ad palpum recipiendum ; exognathus latus, intus dcnte valido 

 aperto arraatus. 



Anaptychus cornutiis, nov. sp. 

 Plate II. fig. 1. 



The upper surface of the carapax is nearly level, but the gastric, car- 

 diac, and inner part of the branchial region are slightly protuberant. 

 There are also nine low tubercles on the gastric region. Surface covered 

 with minute tufts of very short setae. Antero-lateral margin with three 

 large triangular sub-laminiform teeth behind the orbits, separated from 

 each other by regularly curved sinuses. Posterior margin with a crest, 

 interrupted on each side ; the middle portion being arcuated and fim- 

 bricated with four pencils of stout longish setae. Rostrum forming 

 nearly one-fourth the length of the carapax, and cleft nearly to its base ; 

 horns acute. Chelipeds a little longer than the first pair of ambulatory 

 feet, but scarcely thicker; mcros with five or six blunt, somewhat lamini- 

 form spines; carpus tuberculated above; hand unarmed, minutely granu- 

 lated ; fingers scarcely gaping, minutely toothed within, tips not spoon- 

 shaped. Inferior surface with stout setae. Abdomen as in allied forms, 

 widened near the base. Length of carapax in a male, 1.00; breadth, 

 1.24 inch. 



Found in Pinacate Bay, near Guayraas, Gulf of California, 

 by Capt. C. M. P. Stone. 



