LEODICID^ OF THE WEST INDIAN REGION. 



59 



collected in loose coquina rock near Gibbet Island. They were also collected in Tuckers- 

 town Bay and in Ely's Harbor. In the Tortugas two specimens were collected in 

 much-worn coral rock lying between tides at the steamer landing at Fort Jefferson. The 

 species also occurred in Buccoo Bay, Tobago. Verrill speaks of Marphysa regalis as the 

 commonest species in Bermuda. In my 1916 collections these were almost as abundant, 

 though found in slightly different localities. They are closely associated with the variety 

 brevibranchiata Treadwell. 



Text-figures 184 to 193. 

 Marphysa acicularum Webster. 



184. First parapodium x20. 



185. Tenth parapodium xl5. 



186. One-hundredth parapodium 



X16. 



187. Tip of ventral acicula x394. 



188. Maxilla xl2. 



189. Mandible xl2. 



190. Compound seta x394. 



191. Pectinate seta x394. 



192. Simple seta x394. 



193. Dorsal acicula x394. 



Ehlers (1887, p. 97) lists without further description a badly preserved specimen 

 of Marphysa from Key West as jirobably M. parishii of Baird (1870, p. 352). Baird's 

 description states that it is about 32 inches long, with articulated tentacles which are 

 scarcely as long as the head (prostomium). In the Museum of Comparative Zoology 

 at Cambridge is a specimen, apparently the one Ehlers saw, but it has longer, non- 

 articulated tentacles, and it seems to me to agree in all essential details with M. acicu- 

 larum. So far as I can tell, it is of this species, and M. parishii has not been described 

 from the Florida region. 



