Narrative of Bahama Expedition. i6i 



heterochclis cut another completely in two by a single blow, and 

 the victim is then quickly dismembered and literally torn to 

 fragments." 



Among the more aberrant forms of Crustaceans may be 

 inentioned a Goiiodactyhis found in shallow water near Key 

 West. A number of specimens of Pvcnogonida were col- 

 lected, a group characterized by exceedingly elongated legs 

 which are eight in number, and thus approach the spider type. 

 Attempts have been made to homologize the different append- 

 ages with those of the Arachnida, but this is considered 

 impossible by Mr. Edmund B. Wilson, who has studied this 

 group. 1 Several of our specimens show the egg-sacs attached 

 to the ovigerous legs of the male. They all came from com- 

 paratively deep w^ater, eighty to two hundred fathoms, and the 

 •eyes in all are either rudimentary or at least not well pig- 

 mented. To the non-specialist there appears to be three or 

 four species in our material from the Pourtales Plateau, one of 

 which is probablv an Ascorhynchus. 



Four or five species of barnacles were secured from this 

 region, — two of the Balanus type and two of the Lefas type- 

 One of the former seemed specially addicted to attaching itself 

 to the spines of a sea-urchin {^Dorocidan's papillafa). A very 

 large Lepas was dredged from a depth of one hundred and 

 twenty fathoms. Another and smaller form was found to be 

 very abundant on the body and appendages of the largest crab 

 taken in this region, Auaniathia crassa A. M. E. 



V^ery few worms were taken from the Pourtales Plateau, 

 and these were small, tube-dwelling forms. A number of 

 large Brachiopods were dredged from a depth of about one 

 hundred fathoms. They were apparently of two species, one 

 belonging to the genus Terebratida and closely resembling the 

 figure of T. cuhcnsis Davidson. It is by far the less abundant - 

 of the two, at least in the series secured bv us. The other 

 species appears to be Wtddheiniia foridaiia. The admirable 

 joint formed by the apposed margins of the two valves in this 

 species is shown by the fact that a specimen will hold alcohol 



1 Bulletin Mus. Comp. Zool., \'ol. \'III, No. 12, page 241. 



