24 Proceedings of the Biological Society of Washington. 



Description. — Carapace wider than in the allied species; no spine nor 

 tubercle present on the postero-lateral margin; above the margin a row 

 of two tubercles runs obliquely transversely backward from the spine 

 at the lateral angle; first two antero-lateral lobes rectangular. Rostral 

 sinus V-shaped, horns very wide. Two tubercles or blunt spines on an- 

 terior margin of arm. 



Microphrys antillensis, sp. nov. 



Holotype. — Male, Cat. No. 43017, United States National Museum. 

 Collected off Montego Bay Point, Jamaica, June 28, 1910, by Dr. E. A. 

 Andrews for the Museum. 



Measurements. — Male holotype, total length of carapace 14 mm., length 

 of horns 2.4 mm., width of carapace without spines 10.5 mm., with spines 

 11.6 mm. 



Description. — Two processes on the antero-lateral wall of the carapace, 

 the hepatic process having an anterior, outward-projecting tooth and the 

 branchial process not rimmed nor sharply defined. Two adjacent bran- 

 chial spines (paired), one near the lateral angle, the other in almost a 

 transverse line. No lobe on margin of basal antennal article behind the 

 antero-external spine. 



Microphrys interruptus, sp. nov. 



Holotype.— Male, Cat. No. 48753, United States National Museum. 

 Collected at Ensenada de Cajon, off Cape San Antonio, Cuba, Station 11, 

 May 22, 1914, by the Tomas Barrera Expedition, Henderson and Bartsch, 

 naturalists. 



Measurements. — Male holotype, total length of carapace 10.7 mm., 

 length of horns 1.4 mm., width of carapace without spines 8.2 mm., with 

 spines 8.4 mm. 



Description. — The branchial region bears a high oblique elevation, divided 

 in two, the anterior part elongate and bilobed at summit, the posterior 

 part small and conical; in the same line is a stout, curved, sharp spine 

 at the lateral angle of carapace; a conical tubercle in transverse line with 

 the spine; a granulated, raised areole on either side of the cardiac region; 

 a finely granulated, depressed areole at inner angle of branchial region. 

 Cardiac and mesogastric regions nodulose; a transverse curve of 5 tuber- 

 cles across the gastric region. An arch of 4 tubercles above the posterior 

 margin; below it 2 smaller tubercles side by side. Carapace wider an- 

 teriorly than usual, orbits more tubular; preorbital tooth not produced. 



Antero-lateral spine of basal article of antenna broad, flat, projecting 

 obliquely outward; it is followed on the outer margin by a tuberculiform 

 tooth; tubercle on ventral surface low, almost obsolete. 



