126 H. J. HANSEN. 
opinion, and D. dilatata (Richardson) must, judging from 
the aberrant shape of the antennule, probably be established 
as the type for a new genus. 
(2) Neesicopea (Stebb.).—The type is Cymodoceabys- 
sorum (Bedd.). 
(3) Dynamenella (n. gen.).—As the type I take Dyna- 
mene perforata (Moore), of which I have examined an adult 
male and an immature male from the U. 8. National Museum. 
Besides, I have seen specimens of two undescribed species, 
respectively from St. Thomas and Valparaiso. On other forms 
perhaps belonging to this genus see my notes on Dynamene. 
Above (p. 117) it is stated that Spheroma perforatum 
(M.-Edw.) and Sph. globicauda (Dana) are not improb- 
ably species of Dynamenella. 
(4) Cymodocella (Pfeff.).—The genus has been established 
on C. tubicauda (Pfeff.). I have examined specimens from 
Dr. Chilton of his Spheroma? egregium. The twospecies 
are identical, and the type must, therefore, be named C. 
egregia (Chilt.). According to description and figures 
Spheroma algoense (Stebb.) belongs to the same genus. 
(5) Scutuloidea (Chilt.)—Only the typical species, S. 
maculata (Chilt.), is known. 
(6) Amphoroidea (M. Edw.).—This beautiful and easily 
recognisable genus was established on A. typa (M. Edw.). 
Two other species have been described, viz. A. austra- 
liensis (Dana) and A. falcifer (Thoms.). 
(7) Paracerceis (n. gen.).—The type is P. caudata (Say), 
referred by Say, Milne-Edwards, and White to the genus 
Nesa (Leach), by Ives to Cymodoce (Leach), by Moore and 
Harriet Richardson to Ciliczea (Leach). According to 
examination of a typical specimen from Say in the British 
Museum, material from Cuba in the Copenhagen Museum, 
and specimens from Florida sent me by U. 8. National 
Museum, at least some of the specimens referred by American 
authors to P. caudata (Say) belong to an unnamed and 
closely allied species. Dynamene bermudensis (Ives) is 
(see my notes on Dynamene) a female of that new species. 
