2 University of Michigan 



vicinity of San Lorenzo, is more extensive than that from 

 British Guiana, made in the Demerara River region. No spe- 

 cies is common to the collections made in the two countries. 

 The species secured, separately listed for Colombia and British 

 Guiana, and for St. Croix, U. S. Virgin Islands, where a few 

 forms were also collected, are as follows : 



Colombia 

 Glnmcridcsmus porcellus Gervais and Goudot. 

 Siphonophora graciliccps, sp. nov. 

 Siphonophoni pcarsci, sp. nov. 

 Stcinmiulus major Carl. 

 Stcmuiiiihis craunis, sp. nov. 

 Stciniipitthis rutJivcni, sp. nov. 

 StcDiJiiiiilus, sp. 



EpU'aiuiolcnc lorcnzonus, sp. nov. 

 Epinannoleiic xcstiis, sp. nov. 

 Epin'annolctic ariiis, sp. nov. 

 Episfreptiis ciistriatiis, sp. nov. 

 Spirostrcptus atoponis. sp. nov. 

 Orthoporus gaigci, sp. nov. 

 Rhinocricus hrcvipcs. sp. nov. 

 Rhinocricus hylophilus, sp. nov. 

 Rhinocricus pycnus, sp. nov. 

 Rhinocricus aiublus, sp. nov. 

 Microspiroholus iridcns, sp. nov. 

 Pycnotropis colonibieiisis, sp. nov. 

 Pycnotropis cyliiidroidcs. sp. nov. 

 Polylcpiscus, sp. 



Trachclodcsmus anguhitus. sp. nov. 

 Trachclodesmus ancylophor, sp. nov. 

 Droniodcstnus longipcs, gen. et sp. nov. 

 Colonibodesmus catharns, gen. ct sp. nov. 

 Colombodesmus lygrus, sp. nov. 

 Cormodesmus hirsutcllus, gen. et sp. nov. 

 Alassodcsmus rcductus, gen. et sp. nov. 

 Trichoiiwrpha tuberculosa, sp. nov. 

 Trichomorpha rugosclla, sp. nov. 

 'rrichomorpha sctosior, sp. nov. 

 Trichoiiwrpha cutyla, sp. nov. 

 Trichomorpha cuscma, sp. nov. 

 Trichomorpha angulella, sp. nov. 

 Trichomorpha paurothrix, sp. nov. 



