ISOPODS OF NORTH AMERICA. 147 



The clypeus is very narrow, partly concealed; the labrum is con- 

 cealed. 



The last segment of the abdomen is somewhat longer than in E. 

 quadricornis, being a fourth part wider than long, bare above, and 

 ornamented on the dorsal surface near the base with two large tuber- 

 cles, separated a little; the sublateral impressions are deep; the. apex 

 is furnished with two spines. 



The uropoda are wider than in E. quadricornis j the branches are 

 ornamented with some long hairs and a few spines; the peduncle 

 has the inner angle short, occupying about a third of the inner 

 branch. 



The color is dark black; the last segment of the abdomen and the 

 uropoda are brown, ornamented with branching black spots." 



Two specimens, both males, from Florida, in the collection of the 

 U. S. National Museum, I have referred to this species with some 

 hesitation, as they lack the two large tubercles at the base of the ter- 

 minal abdominal segment. They agree in other respects with Han- 

 sen's description of this species, but as Doctor Hansen's only speci- 

 men was a young specimen, very likely a female and taken in the 

 process of ecdysis, 1 would hesitate to make a new species until I had 

 more material. 



The above description is adapted from the following description of Hansen's: 



Diagn. Feminte Cor. quadricornis subsinrilis, tamen imprimis differt characteribus 

 sequentibus. Oculi leviter granulati. Antennularum articulus basalis pedunculi 

 pronus visus valde dilatatus, supinus visus ita prominens, ut articuli basales anten- 

 narum in riuia sat profunda inter antennulas et mandibulas positi sint. Segmentum 

 ultimum caudre dorso prope basin nodis duobus magnis, paulum distantibus ornata, 

 impressionibus sublateralibus profundis, apice spinis 2 instructo. Long. 4, 7 mm. 



Descr. Specimen singulum juvenile in mutatione cutis captum et ob earn causam 

 a speciebus ceteris habitu sat diversum vidi. Characteres prsecipui in diagnosi 

 exhibit! sunt; pneterea characteres sequentes commemorare possum. 



Frons ante in processum trigonum sat magnum producta. 



Lamina frontalis paulo longior quam latior, ad apicem versus nonnihil angustata, 

 apice rotundato, superficie excavate. 



Clypeus perangustatus, ex parte detectUs, labrum obtectum. Antennulee articulo 

 secundo pedunculi gracili, flagello c. 7-articulato. 



Segmentum ultimum caudae nonnihil longius quam in speciebus praecedentibus 

 (C. quadricornis), quarta parte latius quam longius, superne nudum. 



Uropoda fere latiora quam in speciebus pra'cedentibus; raini setis nonnihil longi- 

 oribus et spinis paucioribus ornati; scapus angulo interiore breviore, circiter tertiam 

 partein rami interioris occupans. 



Color fusco-piceus; segmentum ultimum caudee et uropoda brunnea, maculis rainosis 

 nigris ornata. HANSEN, Vidensk. Selsk. Skr. (6), V 7 , 1890, pp. 3S2-383. 



